<?xml version="1.0" encoding="utf-8"?>
<!--XBRL document created with Toppan Merrill Bridge  10.5.0.8 -->
<!--Based on XBRL 2.1-->
<!--Created on: 2/29/2024 8:49:33 PM-->
<!--Modified on: 2/29/2024 8:49:33 PM-->
<xsd:schema targetNamespace="http://www.plugpoweinc.com/20231231" attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:us-gaap="http://fasb.org/us-gaap/2023" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:srt-types="http://fasb.org/srt-types/2023" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2022-03-31" xmlns:plug="http://www.plugpoweinc.com/20231231" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:currency="http://xbrl.sec.gov/currency/2023" xmlns:us-roles="http://fasb.org/us-roles/2023" xmlns:sic="http://xbrl.sec.gov/sic/2023" xmlns:us-types="http://fasb.org/us-types/2023" xmlns:srt-roles="http://fasb.org/srt-roles/2023" xmlns:stpr="http://xbrl.sec.gov/stpr/2023" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:exch="http://xbrl.sec.gov/exch/2023" xmlns:naics="http://xbrl.sec.gov/naics/2023" xmlns:country="http://xbrl.sec.gov/country/2023" xmlns:attributeFormDefault="unqualified" xmlns:srt="http://fasb.org/srt/2023" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:ecd="http://xbrl.sec.gov/ecd/2023" xmlns:ecd-sub="http://xbrl.sec.gov/ecd-sub/2023">
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureStandardAndCustomAxisDomainDefaults" id="DisclosureStandardAndCustomAxisDomainDefaults">
        <link:definition>99900 - Disclosure - Standard And Custom Axis Domain Defaults</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/StatementConsolidatedBalanceSheets" id="StatementConsolidatedBalanceSheets">
        <link:definition>00100 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/StatementConsolidatedStatementsOfOperations" id="StatementConsolidatedStatementsOfOperations">
        <link:definition>00200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/StatementConsolidatedStatementsOfComprehensiveLoss" id="StatementConsolidatedStatementsOfComprehensiveLoss">
        <link:definition>00300 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/StatementConsolidatedStatementsOfCashFlows" id="StatementConsolidatedStatementsOfCashFlows">
        <link:definition>00500 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAcquisitionsAllocationOfPurchasePriceDetails" id="DisclosureAcquisitionsAllocationOfPurchasePriceDetails">
        <link:definition>40302 - Disclosure - Acquisitions - Allocation of Purchase Price (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInvestmentsContractualMaturityDetails" id="DisclosureInvestmentsContractualMaturityDetails">
        <link:definition>40404 - Disclosure - Investments - Contractual Maturity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInvestmentsCapitalCommitmentsDetails" id="DisclosureInvestmentsCapitalCommitmentsDetails">
        <link:definition>40406 - Disclosure - Investments - Capital commitments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInventoryDetails" id="DisclosureInventoryDetails">
        <link:definition>40701 - Disclosure - Inventory (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosurePropertyPlantAndEquipmentDetails" id="DisclosurePropertyPlantAndEquipmentDetails">
        <link:definition>40801 - Disclosure - Property, Plant and Equipment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEquipmentRelatedToPowerPurchaseAgreementsAndFuelDeliveredToCustomersNetComponentsDetails" id="DisclosureEquipmentRelatedToPowerPurchaseAgreementsAndFuelDeliveredToCustomersNetComponentsDetails">
        <link:definition>40901 - Disclosure - Equipment Related to Power Purchase Agreements and Fuel Delivered to Customers, net - Components (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIntangibleAssetsAndGoodwillGrossCarryingAmountDetails" id="DisclosureIntangibleAssetsAndGoodwillGrossCarryingAmountDetails">
        <link:definition>41001 - Disclosure - Intangible Assets and Goodwill - Gross Carrying Amount (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIntangibleAssetsAndGoodwillEstimatedAmortizationExpenseDetails" id="DisclosureIntangibleAssetsAndGoodwillEstimatedAmortizationExpenseDetails">
        <link:definition>41002 - Disclosure - Intangible Assets and Goodwill - Estimated Amortization Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAccruedExpensesDetails" id="DisclosureAccruedExpensesDetails">
        <link:definition>41101 - Disclosure - Accrued Expenses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureOperatingAndFinanceLeaseLiabilitiesFutureMinimumLeasePaymentsUnderOperatingAndFinanceLeasesDetails" id="DisclosureOperatingAndFinanceLeaseLiabilitiesFutureMinimumLeasePaymentsUnderOperatingAndFinanceLeasesDetails">
        <link:definition>41202 - Disclosure - Operating and Finance Lease Liabilities - Future minimum lease payments under operating and finance leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFinanceObligationFutureMinimumPaymentsUnderFinanceObligationsDetails" id="DisclosureFinanceObligationFutureMinimumPaymentsUnderFinanceObligationsDetails">
        <link:definition>41302 - Disclosure - Finance Obligation - Future minimum payments under finance obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureLongTermDebtPrincipalBalanceDueDetails" id="DisclosureLongTermDebtPrincipalBalanceDueDetails">
        <link:definition>41402 - Disclosure - Long-Term Debt - Principal Balance Due (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureConvertibleSeniorNotesComponentsDetails" id="DisclosureConvertibleSeniorNotesComponentsDetails">
        <link:definition>41503 - Disclosure - Convertible Senior Notes - Components (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureOperatingAndFinanceLeaseLiabilitiesFutureMinimumLeasePaymentsUnderOperatingAndFinanceLeasesDetailsCalc2" id="DisclosureOperatingAndFinanceLeaseLiabilitiesFutureMinimumLeasePaymentsUnderOperatingAndFinanceLeasesDetailsCalc2">
        <link:definition>41602 - Disclosure - Operating and Finance Lease Liabilities - Future minimum lease payments under operating and finance leases (Details) - Calc2</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureRevenueChangesInContractAssetsAndContractLiabilitiesDetails" id="DisclosureRevenueChangesInContractAssetsAndContractLiabilitiesDetails">
        <link:definition>41803 - Disclosure - Revenue - Changes in contract assets and contract liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" id="DisclosureIncomeTaxesEffectiveIncomeTaxRateReconciliationDetails">
        <link:definition>42002 - Disclosure - Income Taxes - Effective Income Tax Rate Reconciliation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails" id="DisclosureIncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails">
        <link:definition>42003 - Disclosure - Income Taxes - Deferred Tax Assets And Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureCommitmentsAndContingenciesPurchaseObligationsDetails" id="DisclosureCommitmentsAndContingenciesPurchaseObligationsDetails">
        <link:definition>42102 - Disclosure - Commitments and Contingencies - Purchase Obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DocumentDocumentAndEntityInformation" id="DocumentDocumentAndEntityInformation">
        <link:definition>00090 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/StatementConsolidatedBalanceSheetsParenthetical" id="StatementConsolidatedBalanceSheetsParenthetical">
        <link:definition>00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/StatementConsolidatedStatementsOfStockholdersEquity" id="StatementConsolidatedStatementsOfStockholdersEquity">
        <link:definition>00400 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/StatementConsolidatedStatementsOfStockholdersEquityParenthetical" id="StatementConsolidatedStatementsOfStockholdersEquityParenthetical">
        <link:definition>00405 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureNatureOfOperations" id="DisclosureNatureOfOperations">
        <link:definition>10101 - Disclosure - Nature of Operations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSummaryOfSignificantAccountingPolicies" id="DisclosureSummaryOfSignificantAccountingPolicies">
        <link:definition>10201 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFairValueMeasurements" id="DisclosureFairValueMeasurements">
        <link:definition>10501 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEarningsPerShare" id="DisclosureEarningsPerShare">
        <link:definition>10601 - Disclosure - Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInventory" id="DisclosureInventory">
        <link:definition>10701 - Disclosure - Inventory</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosurePropertyPlantAndEquipment" id="DisclosurePropertyPlantAndEquipment">
        <link:definition>10801 - Disclosure - Property, Plant and Equipment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEquipmentRelatedToPowerPurchaseAgreementsAndFuelDeliveredToCustomersNet" id="DisclosureEquipmentRelatedToPowerPurchaseAgreementsAndFuelDeliveredToCustomersNet">
        <link:definition>10901 - Disclosure - Equipment Related to Power Purchase Agreements and Fuel Delivered to Customers, net</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIntangibleAssetsAndGoodwill" id="DisclosureIntangibleAssetsAndGoodwill">
        <link:definition>11001 - Disclosure - Intangible Assets and Goodwill</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAccruedExpenses" id="DisclosureAccruedExpenses">
        <link:definition>11101 - Disclosure - Accrued Expenses</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureLongTermDebt" id="DisclosureLongTermDebt">
        <link:definition>11401 - Disclosure - Long-Term Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureStockholdersEquity" id="DisclosureStockholdersEquity">
        <link:definition>11601 - Disclosure - Stockholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureWarrantTransactionAgreements" id="DisclosureWarrantTransactionAgreements">
        <link:definition>11701 - Disclosure - Warrant Transaction Agreements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEmployeeBenefitPlans" id="DisclosureEmployeeBenefitPlans">
        <link:definition>11901 - Disclosure - Employee Benefit Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIncomeTaxes" id="DisclosureIncomeTaxes">
        <link:definition>12001 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureCommitmentsAndContingencies" id="DisclosureCommitmentsAndContingencies">
        <link:definition>12101 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSubsequentEvents" id="DisclosureSubsequentEvents">
        <link:definition>12401 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" id="DisclosureSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>20202 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables" id="DisclosureSummaryOfSignificantAccountingPoliciesTables">
        <link:definition>30203 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAcquisitionsTables" id="DisclosureAcquisitionsTables">
        <link:definition>30303 - Disclosure - Acquisitions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFairValueMeasurementsTables" id="DisclosureFairValueMeasurementsTables">
        <link:definition>30503 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEarningsPerShareTables" id="DisclosureEarningsPerShareTables">
        <link:definition>30603 - Disclosure - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInventoryTables" id="DisclosureInventoryTables">
        <link:definition>30703 - Disclosure - Inventory (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosurePropertyPlantAndEquipmentTables" id="DisclosurePropertyPlantAndEquipmentTables">
        <link:definition>30803 - Disclosure - Property, Plant and Equipment (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEquipmentRelatedToPowerPurchaseAgreementsAndFuelDeliveredToCustomersNetTables" id="DisclosureEquipmentRelatedToPowerPurchaseAgreementsAndFuelDeliveredToCustomersNetTables">
        <link:definition>30903 - Disclosure - Equipment Related to Power Purchase Agreements and Fuel Delivered to Customers, net (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIntangibleAssetsAndGoodwillTables" id="DisclosureIntangibleAssetsAndGoodwillTables">
        <link:definition>31003 - Disclosure - Intangible Assets and Goodwill (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAccruedExpensesTables" id="DisclosureAccruedExpensesTables">
        <link:definition>31103 - Disclosure - Accrued Expenses (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFinanceObligationTables" id="DisclosureFinanceObligationTables">
        <link:definition>31303 - Disclosure - Finance Obligation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureConvertibleSeniorNotesTables" id="DisclosureConvertibleSeniorNotesTables">
        <link:definition>31503 - Disclosure - Convertible Senior Notes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureWarrantTransactionAgreementsTables" id="DisclosureWarrantTransactionAgreementsTables">
        <link:definition>31703 - Disclosure - Warrant Transaction Agreements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEmployeeBenefitPlansTables" id="DisclosureEmployeeBenefitPlansTables">
        <link:definition>31903 - Disclosure - Employee Benefit Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIncomeTaxesTables" id="DisclosureIncomeTaxesTables">
        <link:definition>32003 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureCommitmentsAndContingenciesTables" id="DisclosureCommitmentsAndContingenciesTables">
        <link:definition>32103 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureNatureOfOperationsDescriptionOfBusinessDetails" id="DisclosureNatureOfOperationsDescriptionOfBusinessDetails">
        <link:definition>40101 - Disclosure - Nature of Operations - Description Of Business (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureNatureOfOperationsLiquidityCapitalResourcesAndGoingConcernDetails" id="DisclosureNatureOfOperationsLiquidityCapitalResourcesAndGoingConcernDetails">
        <link:definition>40102 - Disclosure - Nature of Operations - Liquidity, Capital Resources and Going Concern (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesDetails">
        <link:definition>40201 - Disclosure - Summary of Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAcquisitionsFairValueOfConsiderationDetails" id="DisclosureAcquisitionsFairValueOfConsiderationDetails">
        <link:definition>40301 - Disclosure - Acquisitions - Fair value of consideration (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAcquisitionsGoodwillDetails" id="DisclosureAcquisitionsGoodwillDetails">
        <link:definition>40303 - Disclosure - Acquisitions - Goodwill (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAcquisitionsNarrativesDetails" id="DisclosureAcquisitionsNarrativesDetails">
        <link:definition>40304 - Disclosure - Acquisitions - Narratives (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAcquisitionsUnauditedProFormaResultsDetails" id="DisclosureAcquisitionsUnauditedProFormaResultsDetails">
        <link:definition>40305 - Disclosure - Acquisitions - Unaudited Pro Forma Results (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInvestmentsAvailableForSaleSecuritiesDetails" id="DisclosureInvestmentsAvailableForSaleSecuritiesDetails">
        <link:definition>40401 - Disclosure - Investments - Available-for-sale securities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInvestmentsAvailableForSaleSecuritiesUnrealizedLossDetails" id="DisclosureInvestmentsAvailableForSaleSecuritiesUnrealizedLossDetails">
        <link:definition>40402 - Disclosure - Investments - Available-for-sale securities, Unrealized Loss (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInvestmentsEquitySecuritiesDetails" id="DisclosureInvestmentsEquitySecuritiesDetails">
        <link:definition>40403 - Disclosure - Investments - Equity Securities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInvestmentsEquityMethodInvestmentsDetails" id="DisclosureInvestmentsEquityMethodInvestmentsDetails">
        <link:definition>40405 - Disclosure - Investments - Equity Method Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFairValueMeasurementsNarrativeDetails" id="DisclosureFairValueMeasurementsNarrativeDetails">
        <link:definition>40501 - Disclosure - Fair Value Measurements - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFairValueMeasurementsAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails" id="DisclosureFairValueMeasurementsAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails">
        <link:definition>40502 - Disclosure - Fair Value Measurements - Assets and liabilities measured at fair value on a recurring basis (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFairValueMeasurementsAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisThatHaveUnobservableInputsDetails" id="DisclosureFairValueMeasurementsAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisThatHaveUnobservableInputsDetails">
        <link:definition>40503 - Disclosure - Fair Value Measurements - Assets and liabilities measured at fair value on recurring basis that have unobservable inputs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFairValueMeasurementsLevel3InstrumentsReconciliationDetails" id="DisclosureFairValueMeasurementsLevel3InstrumentsReconciliationDetails">
        <link:definition>40504 - Disclosure - Fair Value Measurements - Level 3 Instruments Reconciliation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEarningsPerShareBasicAndDilutedComponentsDetails" id="DisclosureEarningsPerShareBasicAndDilutedComponentsDetails">
        <link:definition>40601 - Disclosure - Earnings Per Share - Basic and Diluted Components (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEarningsPerShareDilutivePotentialCommonSharesDetails" id="DisclosureEarningsPerShareDilutivePotentialCommonSharesDetails">
        <link:definition>40602 - Disclosure - Earnings Per Share - Dilutive Potential Common Shares (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEquipmentRelatedToPowerPurchaseAgreementsAndFuelDeliveredToCustomersNetDetails" id="DisclosureEquipmentRelatedToPowerPurchaseAgreementsAndFuelDeliveredToCustomersNetDetails">
        <link:definition>40902 - Disclosure - Equipment Related to Power Purchase Agreements and Fuel Delivered to Customers, net (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureOperatingAndFinanceLeaseLiabilitiesNarrativeDetails" id="DisclosureOperatingAndFinanceLeaseLiabilitiesNarrativeDetails">
        <link:definition>41201 - Disclosure - Operating and Finance Lease Liabilities - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFinanceObligationNarrativeDetails" id="DisclosureFinanceObligationNarrativeDetails">
        <link:definition>41301 - Disclosure - Finance Obligation - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFinanceObligationOtherInformationDetails" id="DisclosureFinanceObligationOtherInformationDetails">
        <link:definition>41303 - Disclosure - Finance Obligation - Other information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureLongTermDebtDetails" id="DisclosureLongTermDebtDetails">
        <link:definition>41401 - Disclosure - Long-Term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureConvertibleSeniorNotesNarrativesDetails" id="DisclosureConvertibleSeniorNotesNarrativesDetails">
        <link:definition>41501 - Disclosure - Convertible Senior Notes - Narratives (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureConvertibleSeniorNotesConversionDetails" id="DisclosureConvertibleSeniorNotesConversionDetails">
        <link:definition>41502 - Disclosure - Convertible Senior Notes - Conversion (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureConvertibleSeniorNotesExpensesAndInterestDetails" id="DisclosureConvertibleSeniorNotesExpensesAndInterestDetails">
        <link:definition>41504 - Disclosure - Convertible Senior Notes - Expenses and Interest (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureConvertibleSeniorNotesCappedCallAndCommonStockForwardDetails" id="DisclosureConvertibleSeniorNotesCappedCallAndCommonStockForwardDetails">
        <link:definition>41505 - Disclosure - Convertible Senior Notes - Capped Call and Common Stock Forward (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureStockholdersEquityCommonStockAndWarrantsDetails" id="DisclosureStockholdersEquityCommonStockAndWarrantsDetails">
        <link:definition>41601 - Disclosure - Stockholders' Equity - Common Stock and Warrants (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureStockholdersEquityAccumulatedOtherComprehensiveIncomeLossDetails" id="DisclosureStockholdersEquityAccumulatedOtherComprehensiveIncomeLossDetails">
        <link:definition>41602 - Disclosure - Stockholders' Equity - Accumulated Other Comprehensive Income (Loss) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureWarrantTransactionAgreementsAmazoncomIncTransactionAgreementDetails" id="DisclosureWarrantTransactionAgreementsAmazoncomIncTransactionAgreementDetails">
        <link:definition>41701 - Disclosure - Warrant Transaction Agreements - Amazon.com, Inc. Transaction Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureWarrantTransactionAgreementsWalmartStoresIncTransactionAgreementDetails" id="DisclosureWarrantTransactionAgreementsWalmartStoresIncTransactionAgreementDetails">
        <link:definition>41702 - Disclosure - Warrant Transaction Agreements - Walmart Stores, Inc. Transaction Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureRevenueDisaggregationOfRevenueDetails" id="DisclosureRevenueDisaggregationOfRevenueDetails">
        <link:definition>41801 - Disclosure - Revenue - Disaggregation of Revenue (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureRevenueContractBalancesDetails" id="DisclosureRevenueContractBalancesDetails">
        <link:definition>41802 - Disclosure - Revenue - Contract balances (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureRevenueEstimatedFutureRevenueDetails" id="DisclosureRevenueEstimatedFutureRevenueDetails">
        <link:definition>41804 - Disclosure - Revenue - Estimated future revenue (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEmployeeBenefitPlansAssumptionsForEstimatingFairValueDetails" id="DisclosureEmployeeBenefitPlansAssumptionsForEstimatingFairValueDetails">
        <link:definition>41901 - Disclosure - Employee Benefit Plans - Assumptions For Estimating Fair Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEmployeeBenefitPlansStockActivityWeightedAverageExercisePriceDetails" id="DisclosureEmployeeBenefitPlansStockActivityWeightedAverageExercisePriceDetails">
        <link:definition>41902 - Disclosure - Employee Benefit Plans - Stock Activity, Weighted Average Exercise Price (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEmployeeBenefitPlansRestrictedCommonStockAndRestrictedStockUnitAwardsDetails" id="DisclosureEmployeeBenefitPlansRestrictedCommonStockAndRestrictedStockUnitAwardsDetails">
        <link:definition>41903 - Disclosure - Employee Benefit Plans - Restricted Common Stock and Restricted Stock Unit Awards (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureEmployeeBenefitPlans401KSavingAndRetirementPlanDetails" id="DisclosureEmployeeBenefitPlans401KSavingAndRetirementPlanDetails">
        <link:definition>41904 - Disclosure - Employee Benefit Plans - 401(K) Saving And Retirement Plan (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIncomeTaxesComponentsOfIncomeTaxDetails" id="DisclosureIncomeTaxesComponentsOfIncomeTaxDetails">
        <link:definition>42001 - Disclosure - Income Taxes - Components of Income Tax (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIncomeTaxesChangeInValuationAllowanceDetails" id="DisclosureIncomeTaxesChangeInValuationAllowanceDetails">
        <link:definition>42004 - Disclosure - Income Taxes - Change In Valuation Allowance (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIncomeTaxesUnrecognizedTaxBenefitsDetails" id="DisclosureIncomeTaxesUnrecognizedTaxBenefitsDetails">
        <link:definition>42005 - Disclosure - Income Taxes - Unrecognized Tax Benefits (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIncomeTaxesNarrativeDetails" id="DisclosureIncomeTaxesNarrativeDetails">
        <link:definition>42006 - Disclosure - Income Taxes - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureCommitmentsAndContingenciesConcentrationsOfCreditRiskDetails" id="DisclosureCommitmentsAndContingenciesConcentrationsOfCreditRiskDetails">
        <link:definition>42101 - Disclosure - Commitments and Contingencies - Concentrations of Credit Risk (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSegmentAndGeographicAreaReportingDetails" id="DisclosureSegmentAndGeographicAreaReportingDetails">
        <link:definition>42201 - Disclosure - Segment and Geographic Area Reporting (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureRelatedPartyTransactionsDetails" id="DisclosureRelatedPartyTransactionsDetails">
        <link:definition>42301 - Disclosure - Related Party Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSubsequentEventsDetails" id="DisclosureSubsequentEventsDetails">
        <link:definition>42401 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/StatementConsolidatedStatementsOfCashFlowsParenthetical" id="StatementConsolidatedStatementsOfCashFlowsParenthetical">
        <link:definition>00505 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureAcquisitions" id="DisclosureAcquisitions">
        <link:definition>10301 - Disclosure - Acquisitions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInvestments" id="DisclosureInvestments">
        <link:definition>10401 - Disclosure - Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureOperatingAndFinanceLeaseLiabilities" id="DisclosureOperatingAndFinanceLeaseLiabilities">
        <link:definition>11201 - Disclosure - Operating and Finance Lease Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureFinanceObligation" id="DisclosureFinanceObligation">
        <link:definition>11301 - Disclosure - Finance Obligation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureConvertibleSeniorNotes" id="DisclosureConvertibleSeniorNotes">
        <link:definition>11501 - Disclosure - Convertible Senior Notes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureRevenue" id="DisclosureRevenue">
        <link:definition>11801 - Disclosure - Revenue</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSegmentAndGeographicAreaReporting" id="DisclosureSegmentAndGeographicAreaReporting">
        <link:definition>12201 - Disclosure - Segment and Geographic Area Reporting</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureRelatedPartyTransactions" id="DisclosureRelatedPartyTransactions">
        <link:definition>12301 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureInvestmentsTables" id="DisclosureInvestmentsTables">
        <link:definition>30403 - Disclosure - Investments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureOperatingAndFinanceLeaseLiabilitiesTables" id="DisclosureOperatingAndFinanceLeaseLiabilitiesTables">
        <link:definition>31203 - Disclosure - Operating and Finance Lease Liabilities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureLongTermDebtTables" id="DisclosureLongTermDebtTables">
        <link:definition>31403 - Disclosure - Long-Term Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureRevenueTables" id="DisclosureRevenueTables">
        <link:definition>31803 - Disclosure - Revenue (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSegmentAndGeographicAreaReportingTables" id="DisclosureSegmentAndGeographicAreaReportingTables">
        <link:definition>32203 - Disclosure - Segment and Geographic Area Reporting (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureSummaryOfSignificantAccountingPoliciesAccrualForLossContractsDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesAccrualForLossContractsDetails">
        <link:definition>40202 - Disclosure - Summary of Significant Accounting Policies - Accrual for loss contracts (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureIntangibleAssetsAndGoodwillCarryingAmountOfGoodwillDetails" id="DisclosureIntangibleAssetsAndGoodwillCarryingAmountOfGoodwillDetails">
        <link:definition>41003 - Disclosure - Intangible Assets and Goodwill - Carrying Amount of Goodwill (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureOperatingAndFinanceLeaseLiabilitiesOtherInformationRelatedToOperatingLeasesDetails" id="DisclosureOperatingAndFinanceLeaseLiabilitiesOtherInformationRelatedToOperatingLeasesDetails">
        <link:definition>41203 - Disclosure - Operating and Finance Lease Liabilities - Other information related to the operating leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.plugpoweinc.com/role/DisclosureOperatingAndFinanceLeaseLiabilitiesOtherInformationRelatedToFinanceLeasesDetails" id="DisclosureOperatingAndFinanceLeaseLiabilitiesOtherInformationRelatedToFinanceLeasesDetails">
        <link:definition>41204 - Disclosure - Operating and Finance Lease Liabilities - Other information related to the finance leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:type="simple" xlink:href="plug-20231231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="plug-20231231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="plug-20231231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="plug-20231231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:import namespace="http://xbrl.sec.gov/ecd/2023" schemaLocation="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2023" schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-roles-2023.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2023" schemaLocation="https://xbrl.sec.gov/country/2023/country-2023.xsd" />
  <xsd:import namespace="http://fasb.org/srt/2023" schemaLocation="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/ecd-sub/2023" schemaLocation="https://xbrl.sec.gov/ecd/2023/ecd-sub-2023.xsd" />
  <xsd:element name="CustomersMember" id="plug_CustomersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ConcentrationRiskNumberOfCustomers" name="ConcentrationRiskNumberOfCustomers" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element name="CommonStockWarrantAccountingPolicyTextBlock" id="plug_CommonStockWarrantAccountingPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockIssuedDuringPeriodSharesExerciseOfWarrants" id="plug_StockIssuedDuringPeriodSharesExerciseOfWarrants" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ClassOfWarrantOrRightExercised" name="ClassOfWarrantOrRightExercised" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="SoftwareMachineryAndEquipmentMember" id="plug_SoftwareMachineryAndEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ClassOfWarrantOrRightIssued" name="ClassOfWarrantOrRightIssued" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="FinancingTransactionFinanceObligationAmount" id="plug_FinancingTransactionFinanceObligationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="plug_FinancingTransactionFinanceObligationAmountCurrent" name="FinancingTransactionFinanceObligationAmountCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_StockIssuedDuringPeriodValueExerciseOfWarrants" name="StockIssuedDuringPeriodValueExerciseOfWarrants" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element name="NetOperatingLossCarryforwardGeneratedExpired" id="plug_NetOperatingLossCarryforwardGeneratedExpired" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="plug_StockOptionAndIncentivePlan2011Member" name="StockOptionAndIncentivePlan2011Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_EmployeesMember" name="EmployeesMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfDaysAfterInvoiceIssuanceWhenAccountsReceivableIsDueMinimum" id="plug_NumberOfDaysAfterInvoiceIssuanceWhenAccountsReceivableIsDueMinimum" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfDaysAfterInvoiceIssuanceWhenAccountsReceivableIsDueMaximum" id="plug_NumberOfDaysAfterInvoiceIssuanceWhenAccountsReceivableIsDueMaximum" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DeferredTaxAssetsCapitalizedResearchAndDevelopmentExpenditures" id="plug_DeferredTaxAssetsCapitalizedResearchAndDevelopmentExpenditures" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="DeferredTaxAssetsOperatingLossCarryforwardsSubjectToLimitation" id="plug_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToLimitation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="ForeignEarningsNotRepatriated" id="plug_ForeignEarningsNotRepatriated" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfPropertyPlantAndEquipmentUsefulLivesTableTextBlock" id="plug_ScheduleOfPropertyPlantAndEquipmentUsefulLivesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="plug_SeriesJuniorParticipatingCumulativePreferredStockMember" name="SeriesJuniorParticipatingCumulativePreferredStockMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_NonEmployeeDirectorMember" name="NonEmployeeDirectorMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_NonEmployeeDirectorCompensationAbstract" name="NonEmployeeDirectorCompensationAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NatureOfOperationsAbstract" id="plug_NatureOfOperationsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="plug_AccruedAccountsPayableCurrent" name="AccruedAccountsPayableCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element name="ComponentsOfIncomeLossBeforeIncomeTaxesAndProvisionForIncomeTaxesAbstract" id="plug_ComponentsOfIncomeLossBeforeIncomeTaxesAndProvisionForIncomeTaxesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ComponentsOfLossBeforeIncomeTaxesAndProvisionForIncomeTaxesTableTextBlock" id="plug_ComponentsOfLossBeforeIncomeTaxesAndProvisionForIncomeTaxesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ComponentsOfU.s.AndForeignDeferredIncomeTaxesTableTextBlock" name="ComponentsOfU.s.AndForeignDeferredIncomeTaxesTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_PowerPurchaseAgreementsMember" name="PowerPurchaseAgreementsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PrepaidRentAndSecurityDeposit" id="plug_PrepaidRentAndSecurityDeposit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToLimitation" id="plug_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToLimitation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="WalmartCustomerMember" id="plug_WalmartCustomerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationCommonStocksWarrantLiability" id="plug_EffectiveIncomeTaxRateReconciliationCommonStocksWarrantLiability" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ProvisionForLossContractsRelatedToService" name="ProvisionForLossContractsRelatedToService" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_FinancingTransactionFinanceObligationMember" name="FinancingTransactionFinanceObligationMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfWarrantLiabilityActivityTableTextBlock" id="plug_ScheduleOfWarrantLiabilityActivityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SavingsAndRetirementPlan401KMember" id="plug_SavingsAndRetirementPlan401KMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element id="plug_AmortizationOfWarrantCost" name="AmortizationOfWarrantCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_ClassOfWarrantOrRightNumberOfSecuritiesVestedByWarrantsOrRights" name="ClassOfWarrantOrRightNumberOfSecuritiesVestedByWarrantsOrRights" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="plug_WarrantIssuedWithAmazon.comIncTransactionAgreementInApril2017Member" name="WarrantIssuedWithAmazon.comIncTransactionAgreementInApril2017Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_TrancheOneOfWarrantIssuedWithAmazon.comIncTransactionAgreementInApril2017Member" name="TrancheOneOfWarrantIssuedWithAmazon.comIncTransactionAgreementInApril2017Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_AmazonCustomerMember" name="AmazonCustomerMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_TrancheTwoOfWarrantIssuedWithAmazon.comIncTransactionAgreementInApril2017Member" name="TrancheTwoOfWarrantIssuedWithAmazon.comIncTransactionAgreementInApril2017Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_TrancheThreeOfWarrantIssuedWithAmazon.comIncTransactionAgreementInApril2017Member" name="TrancheThreeOfWarrantIssuedWithAmazon.comIncTransactionAgreementInApril2017Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_CashReceiptsForGoodsAndServicesWarrantTransactionAgreement" name="CashReceiptsForGoodsAndServicesWarrantTransactionAgreement" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_NumberOfInstallments" name="NumberOfInstallments" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_ClassOfWarrantOrRightNumberOfSecuritiesVestedPerInstallment" name="ClassOfWarrantOrRightNumberOfSecuritiesVestedPerInstallment" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_ProvisionForCommonStockWarrants" name="ProvisionForCommonStockWarrants" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_EquityProvisionForCommonStockWarrants" name="EquityProvisionForCommonStockWarrants" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_TrancheOneOfWarrantIssuedWithWalmartStoresIncTransactionAgreementInJuly2017Member" name="TrancheOneOfWarrantIssuedWithWalmartStoresIncTransactionAgreementInJuly2017Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_WarrantsAndRightsWalmartStoresIncTransactionAgreementNoteDisclosureAbstract" name="WarrantsAndRightsWalmartStoresIncTransactionAgreementNoteDisclosureAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_WarrantIssuedWithWalmartStoresIncTransactionAgreementInJuly2017Member" name="WarrantIssuedWithWalmartStoresIncTransactionAgreementInJuly2017Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_TrancheTwoOfWarrantIssuedWithWalmartStoresIncTransactionAgreementInJuly2017Member" name="TrancheTwoOfWarrantIssuedWithWalmartStoresIncTransactionAgreementInJuly2017Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_TrancheThreeOfWarrantIssuedWithAmazon.comIncTransactionAgreementInJuly2017Member" name="TrancheThreeOfWarrantIssuedWithAmazon.comIncTransactionAgreementInJuly2017Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_WarrantIssuedWithAmazonAndWalmartStoresIncTransactionAgreementIn2017Member" name="WarrantIssuedWithAmazonAndWalmartStoresIncTransactionAgreementIn2017Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_DeferredTaxAssetsTaxDeferredExpenseNonCompensatoryWarrants" name="DeferredTaxAssetsTaxDeferredExpenseNonCompensatoryWarrants" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="plug_ChangesInContractAssetsAndContractLiabilitiesTableTextBlock" name="ChangesInContractAssetsAndContractLiabilitiesTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_SalesOfFuelCellSystemsMember" name="SalesOfFuelCellSystemsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_SaleOfHydrogenInstallationsAndOtherInfrastructureMember" name="SaleOfHydrogenInstallationsAndOtherInfrastructureMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ServicesPerformedOnFuelCellSystemsAndRelatedInfrastructureMember" name="ServicesPerformedOnFuelCellSystemsAndRelatedInfrastructureMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_OtherProductAndServicesMember" name="OtherProductAndServicesMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ContractWithCustomerAssetIncreaseDecreaseForCashReceived" name="ContractWithCustomerAssetIncreaseDecreaseForCashReceived" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_ConvertibleSeniorNotesAbstract" name="ConvertibleSeniorNotesAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ConvertibleSeniorNotesTextBlock" name="ConvertibleSeniorNotesTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_EstimatedProceedsFromConvertibleSeniorNotesTableTextBlock" name="EstimatedProceedsFromConvertibleSeniorNotesTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_InitialPurchasersDiscount" name="InitialPurchasersDiscount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_NumberOfBusinessDays" name="NumberOfBusinessDays" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_NumberOfConsecutiveTradingDay" name="NumberOfConsecutiveTradingDay" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_PercentageOfProductOfLastReportedSalePriceOfCommonStockAndConversionRate" name="PercentageOfProductOfLastReportedSalePriceOfCommonStockAndConversionRate" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_PercentageOfPremium" name="PercentageOfPremium" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_PurchaseOfCappedCallAndCommonStockForward" name="PurchaseOfCappedCallAndCommonStockForward" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_PaymentTermsForFuelCellsAndServices" name="PaymentTermsForFuelCellsAndServices" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_ExtensionPeriodOfMaintenanceContract" name="ExtensionPeriodOfMaintenanceContract" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_WarrantDisclosureAmazon.comIncAndWalMartStoresIncTransactionTextBlock" name="WarrantDisclosureAmazon.comIncAndWalMartStoresIncTransactionTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_ConvertibleSeniorNotesPolicyTextBlock" name="ConvertibleSeniorNotesPolicyTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_DerivativeCapPricePerShare" name="DerivativeCapPricePerShare" nillable="true" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="plug_ContractWithCustomerAssetRevenueRecognizedAndUnbilled" name="ContractWithCustomerAssetRevenueRecognizedAndUnbilled" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_NetTransfersBetweenInventoryLeaseAssetsAndPropertyPlantAndEquipment" name="NetTransfersBetweenInventoryLeaseAssetsAndPropertyPlantAndEquipment" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_ScheduleOfOperatingLeasesOtherInformationTableTextBlock" name="ScheduleOfOperatingLeasesOtherInformationTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_ScheduleOfFinanceLeasesOtherInformationTableTextBlock" name="ScheduleOfFinanceLeasesOtherInformationTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfaction" name="RevenueRemainingPerformanceObligationExpectedTimingOfSatisfaction" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_IncreaseDecreaseInCustomerLiability" name="IncreaseDecreaseInCustomerLiability" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_DeferredTaxLiabilitiesConvertibleDebt" name="DeferredTaxLiabilitiesConvertibleDebt" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_DeferredTaxAssetsInterestExpense" name="DeferredTaxAssetsInterestExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="plug_InventoryRawMaterialsAndSuppliesProductionLocationsNetOfReserves" name="InventoryRawMaterialsAndSuppliesProductionLocationsNetOfReserves" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="plug_InventoryRawMaterialsAndSuppliesCustomerLocationsNetOfReserves" name="InventoryRawMaterialsAndSuppliesCustomerLocationsNetOfReserves" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="plug_DebtInstrumentDiscountCost" name="DebtInstrumentDiscountCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_DebtInstrumentOtherIssuanceCosts" name="DebtInstrumentOtherIssuanceCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_LeasedPropertyPolicyTextBlock" name="LeasedPropertyPolicyTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_LetterOfCredit" name="LetterOfCredit" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_LoanAndSecurityAgreementMember" name="LoanAndSecurityAgreementMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_NumberOfVotesPerShare" name="NumberOfVotesPerShare" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_LesseeLeaseDescriptionAxis" name="LesseeLeaseDescriptionAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_LesseeLeaseDescriptionDomain" name="LesseeLeaseDescriptionDomain" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_LongTermDebtNonCurrentExcludingConvertibleNotes" name="LongTermDebtNonCurrentExcludingConvertibleNotes" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_ProceedsPaymentsFromStockOptionsExercised" name="ProceedsPaymentsFromStockOptionsExercised" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_AtmarketissuancesalesagreementMember" name="AtmarketissuancesalesagreementMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_PublicOfferingsMember" name="PublicOfferingsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_DeferredTaxAssetsRightOfUseAsset" name="DeferredTaxAssetsRightOfUseAsset" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="plug_DeferredTaxLiabilitiesLeaseLiability" name="DeferredTaxLiabilitiesLeaseLiability" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_OperatingLeaseMaximumAllowedExtensionPercentage" name="OperatingLeaseMaximumAllowedExtensionPercentage" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_GinerElxIncMember" name="GinerElxIncMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_UnitedHydrogenGroupIncMember" name="UnitedHydrogenGroupIncMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ScheduleOfFairValueOfConsiderationPaidUnderBusinessCombinationTableTextBlock" name="ScheduleOfFairValueOfConsiderationPaidUnderBusinessCombinationTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_BusinessCombinationContingentConsiderationPaid" name="BusinessCombinationContingentConsiderationPaid" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_DebtInstrumentTradingDaysPrecedingRedemptionNotice" name="DebtInstrumentTradingDaysPrecedingRedemptionNotice" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_DebtInstrumentRepurchaseAggregateConsideration" name="DebtInstrumentRepurchaseAggregateConsideration" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_BusinessCombinationContingentConsiderationLiabilityAchievementOfRevenueTargets" name="BusinessCombinationContingentConsiderationLiabilityAchievementOfRevenueTargets" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_ThreePointSevenFivePercentOfConvertibleSeniorNotesMember" name="ThreePointSevenFivePercentOfConvertibleSeniorNotesMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_FivePointFivePercentOfConvertibleSeniorNotesMember" name="FivePointFivePercentOfConvertibleSeniorNotesMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_StockIssuedDuringPeriodValueConversionOfConvertibleSeniorNotes" name="StockIssuedDuringPeriodValueConversionOfConvertibleSeniorNotes" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_StockIssuedDuringPeriodSharesConversionOfConvertibleSeniorNotes" name="StockIssuedDuringPeriodSharesConversionOfConvertibleSeniorNotes" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_IncreaseDecreaseInFairValueOfContingentConsideration" name="IncreaseDecreaseInFairValueOfContingentConsideration" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_FairValueOfWarrantsPerShare" name="FairValueOfWarrantsPerShare" nillable="true" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_SubsidiaryOfSkHoldingsCoLtdMember" name="SubsidiaryOfSkHoldingsCoLtdMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_WorkingCapital" name="WorkingCapital" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_BusinessCombinationContingentConsiderationLiabilityFairValueDisclosure" name="BusinessCombinationContingentConsiderationLiabilityFairValueDisclosure" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_TrancheThreeOfWarrantIssuedWithAmazonMember" name="TrancheThreeOfWarrantIssuedWithAmazonMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_WarrantTransactionsDecreaseInRevenueDueToWaivingOfVestingConditions" name="WarrantTransactionsDecreaseInRevenueDueToWaivingOfVestingConditions" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_WarrantIssuedWithAmazonMember" name="WarrantIssuedWithAmazonMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_FiniteLivedIntangibleAssetsAmortizationExpenseNet" name="FiniteLivedIntangibleAssetsAmortizationExpenseNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="plug_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionNonvestedWeightedAverageRemainingContractualTerm" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionNonvestedWeightedAverageRemainingContractualTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionNonvestedIntrinsicValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionNonvestedIntrinsicValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="plug_PropertyPlantAndEquipmentLessorAssetUnderOperatingLeaseAfterAccumulatedDepreciation" name="PropertyPlantAndEquipmentLessorAssetUnderOperatingLeaseAfterAccumulatedDepreciation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="plug_OperatingAndFinanceLeaseLiabilityToBePaidYearTwo" name="OperatingAndFinanceLeaseLiabilityToBePaidYearTwo" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_OperatingAndFinanceLeaseLiabilityToBePaidYearThree" name="OperatingAndFinanceLeaseLiabilityToBePaidYearThree" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_OperatingAndFinanceLeaseLiabilityToBePaidYearFour" name="OperatingAndFinanceLeaseLiabilityToBePaidYearFour" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_OperatingAndFinanceLeaseLiabilityPaymentDueTotal" name="OperatingAndFinanceLeaseLiabilityPaymentDueTotal" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount" name="OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_OperatingAndFinanceLeaseLiability" name="OperatingAndFinanceLeaseLiability" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_OperatingAndFinanceLeaseLiabilityPaymentDueAbstract" name="OperatingAndFinanceLeaseLiabilityPaymentDueAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_FinanceObligationsAbstract" name="FinanceObligationsAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_FinanceObligationsTextBlock" name="FinanceObligationsTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_LeasedPropertyAndEquipmentTableTextBlock" name="LeasedPropertyAndEquipmentTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_PropertyPlantAndEquipmentLessorAssetUnderOperatingLeaseBeforeAccumulatedDepreciation" name="PropertyPlantAndEquipmentLessorAssetUnderOperatingLeaseBeforeAccumulatedDepreciation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="plug_PropertyPlantAndEquipmentLessorAssetUnderOperatingLeaseAccumulatedDepreciation" name="PropertyPlantAndEquipmentLessorAssetUnderOperatingLeaseAccumulatedDepreciation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="plug_ExtendedMaintenanceContractsPolicyPolicyTextBlock" name="ExtendedMaintenanceContractsPolicyPolicyTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_AccrualForLossContractsRollforwardTableTextBlock" name="AccrualForLossContractsRollforwardTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_LossContingencyAccrualPaymentsRelatedToServiceCostOfSales" name="LossContingencyAccrualPaymentsRelatedToServiceCostOfSales" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_LossContingencyAccrualPaymentsRelatedToProvisionForWarrants" name="LossContingencyAccrualPaymentsRelatedToProvisionForWarrants" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_LeaseDisclosureTextBlock" name="LeaseDisclosureTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_PropertyPlantAndEquipmentLessorAssetUnderOperatingLeaseDepreciation" name="PropertyPlantAndEquipmentLessorAssetUnderOperatingLeaseDepreciation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_WarrantAssumptionsExpectedAverageTerm" name="WarrantAssumptionsExpectedAverageTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_ContingentConsiderationMember" name="ContingentConsiderationMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_FairValueAssetsAndLiabilitiesTransfersBetweenLevel1Level2Level3Amount" name="FairValueAssetsAndLiabilitiesTransfersBetweenLevel1Level2Level3Amount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_TwoCustomersMember" name="TwoCustomersMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ThreeCustomersMember" name="ThreeCustomersMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_PercentageOfThresholdWeightedAverageSharePrice" name="PercentageOfThresholdWeightedAverageSharePrice" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_PaymentsToAcquireEquitySecuritiesFvni" name="PaymentsToAcquireEquitySecuritiesFvni" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_ContractTerminationCosts" name="ContractTerminationCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_CostOfRevenueFuelDeliveredToCustomersMember" name="CostOfRevenueFuelDeliveredToCustomersMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_OneCustomersMember" name="OneCustomersMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_StockIncentivePlan2021Member" name="StockIncentivePlan2021Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_HyviaMember" name="HyviaMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_PlugPowerFranceMember" name="PlugPowerFranceMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_RenaultMember" name="RenaultMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_LeaseOriginationCosts" name="LeaseOriginationCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_DebtSecuritiesAvailableForSalePolicyPolicyTextBlock" name="DebtSecuritiesAvailableForSalePolicyPolicyTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_RecognitionOfRightOfUseAssetFinanceLeases" name="RecognitionOfRightOfUseAssetFinanceLeases" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_RecognitionOfRightOfUseAssetOperatingLeases" name="RecognitionOfRightOfUseAssetOperatingLeases" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="plug_StockOptionsVestingBasedOnServiceMember" name="StockOptionsVestingBasedOnServiceMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_StockOptionsVestingBasedOnPerformanceMember" name="StockOptionsVestingBasedOnPerformanceMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageStockPriceThresholdTradingDays" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageStockPriceThresholdTradingDays" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="plug_StockIncentivePlan2011And2021Member" name="StockIncentivePlan2011And2021Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="plug_NumberOfStockPriceHurdles" name="NumberOfStockPriceHurdles" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="plug_IncomeTaxBenefit" name="IncomeTaxBenefit" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="plug_PercentOfOptionsExercisableRange" name="PercentOfOptionsExercisableRange" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="BusinessCombinationContingentConsiderationLiabilityAchievementOfCertainCostTargets" id="plug_BusinessCombinationContingentConsiderationLiabilityAchievementOfCertainCostTargets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="JouleProcessingLlcMember" id="plug_JouleProcessingLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FramesHoldingB.v.Member" id="plug_FramesHoldingB.v.Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAccruedExpensesAndOtherLiabilities" id="plug_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAccruedExpensesAndOtherLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="JointVentureOwnershipPercentage" id="plug_JointVentureOwnershipPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="AccionaPlugS.l.Member" id="plug_AccionaPlugS.l.Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PlugPowerSpainMember" id="plug_PlugPowerSpainMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AccionaMember" id="plug_AccionaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="JointVentureWithSKMember" id="plug_JointVentureWithSKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SkESCo.Ltd.Member" id="plug_SkESCo.Ltd.Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NonoperatingInterestIncome" id="plug_NonoperatingInterestIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ExecutoryContractTerm" id="plug_ExecutoryContractTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAsset" id="plug_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractLiability" id="plug_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SaleOfHydrogenInfrastructureMember" id="plug_SaleOfHydrogenInfrastructureMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SaleOfElectrolyzersMember" id="plug_SaleOfElectrolyzersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SaleOfCryogenicEquipmentMember" id="plug_SaleOfCryogenicEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherCountriesExcludingNorthAmericaMember" id="plug_OtherCountriesExcludingNorthAmericaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SettlementOfIntercompanyLiabilityFromAcquisition" id="plug_SettlementOfIntercompanyLiabilityFromAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceLeaseRightOfUseAssetAmortizationAndInterestExpense" id="plug_FinanceLeaseRightOfUseAssetAmortizationAndInterestExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MasterLeaseAgreementWithWellsForgoMember" id="plug_MasterLeaseAgreementWithWellsForgoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PaymentsOfCashForNonConsolidatedAffiliatesAndNonMarketableEquitySecurities" id="plug_PaymentsOfCashForNonConsolidatedAffiliatesAndNonMarketableEquitySecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVolumeWeightedAveragePrice" id="plug_ShareBasedCompensationArrangementByShareBasedPaymentAwardVolumeWeightedAveragePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="CommissionFeeAmortizationTerm" id="plug_CommissionFeeAmortizationTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="BusinessCombinationContingentConsiderationHeld" id="plug_BusinessCombinationContingentConsiderationHeld" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ConversionOfConvertibleSeniorNotesToCommonStock" id="plug_ConversionOfConvertibleSeniorNotesToCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationOnProvisionToReturnAndDeferredTaxAdjustmentsPercent" id="plug_EffectiveIncomeTaxRateReconciliationOnProvisionToReturnAndDeferredTaxAdjustmentsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationSection162MDisallowanceTaxCutsAndJobsActOf2017Percent" id="plug_EffectiveIncomeTaxRateReconciliationSection162MDisallowanceTaxCutsAndJobsActOf2017Percent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NoncashOrPartNoncashAcquisitionValueOfAssetsLiabilitiesAcquiredAssumedTotal" id="plug_NoncashOrPartNoncashAcquisitionValueOfAssetsLiabilitiesAcquiredAssumedTotal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="FuelDeliveredToCustomersAndRelatedEquipmentMember" id="plug_FuelDeliveredToCustomersAndRelatedEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CollateralRelatedToAcquisitionsMember" id="plug_CollateralRelatedToAcquisitionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DryStackElectrolyzerTechnologyMember" id="plug_DryStackElectrolyzerTechnologyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StockIssuedDuringPeriodValueStockOptionsExercisedAndRestrictedStockAwardIssuance" id="plug_StockIssuedDuringPeriodValueStockOptionsExercisedAndRestrictedStockAwardIssuance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodSharesStockOptionsExercisedAndRestrictedStockAwardIssuance" id="plug_StockIssuedDuringPeriodSharesStockOptionsExercisedAndRestrictedStockAwardIssuance" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RestrictedCashPeriodIncreaseDecreaseTotal" id="plug_RestrictedCashPeriodIncreaseDecreaseTotal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RepaymentsForFinanceObligationsAndFinanceLeases" id="plug_RepaymentsForFinanceObligationsAndFinanceLeases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AmortizationOfDebtIssuanceCost" id="plug_AmortizationOfDebtIssuanceCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ValuationTechniqueScenarioBasedMethodMember" id="plug_ValuationTechniqueScenarioBasedMethodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ValuationTechniqueMonteCarloSimulationMember" id="plug_ValuationTechniqueMonteCarloSimulationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MeasurementInputRevenueVolatilityMember" id="plug_MeasurementInputRevenueVolatilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MeasurementInputGrossProfitVolatilityMember" id="plug_MeasurementInputGrossProfitVolatilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BusinessCombinationOneMember" id="plug_BusinessCombinationOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BusinessCombinationTwoMember" id="plug_BusinessCombinationTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BusinessCombinationThreeMember" id="plug_BusinessCombinationThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SaleAndLeaseBackTransactionSaleOfFutureRevenueDebtMember" id="plug_SaleAndLeaseBackTransactionSaleOfFutureRevenueDebtMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SaleAndLeaseBackFinancingMember" id="plug_SaleAndLeaseBackFinancingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FinancingTransactionFinanceObligationAmountNoncurrent" id="plug_FinancingTransactionFinanceObligationAmountNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceObligationFiscalYearMaturityAbstract" id="plug_FinanceObligationFiscalYearMaturityAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FinanceObligationDueInNextTwelveMonths" id="plug_FinanceObligationDueInNextTwelveMonths" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceObligationDueInSecondYear" id="plug_FinanceObligationDueInSecondYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceObligationDueInThirdYear" id="plug_FinanceObligationDueInThirdYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceObligationDueInFourthYear" id="plug_FinanceObligationDueInFourthYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceObligationPaymentsDue" id="plug_FinanceObligationPaymentsDue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceObligationImputedInterest" id="plug_FinanceObligationImputedInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="FinanceObligationsPayments" id="plug_FinanceObligationsPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceObligationsWeightedAverageRemainingTerm" id="plug_FinanceObligationsWeightedAverageRemainingTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="FinanceObligationsWeightedAverageDiscountRate" id="plug_FinanceObligationsWeightedAverageDiscountRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="CustomsRelatedLettersOfCredit" id="plug_CustomsRelatedLettersOfCredit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LossContingencyAccrualRelatedToForeignCurrencyTranslationAdjustment" id="plug_LossContingencyAccrualRelatedToForeignCurrencyTranslationAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NumberOfHydrogenProductionPlant" id="plug_NumberOfHydrogenProductionPlant" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="SaleOfEngineeredEquipmentMember" id="plug_SaleOfEngineeredEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MinimumPercentageOfWarrantsVestedAndExercisableAutomatically" id="plug_MinimumPercentageOfWarrantsVestedAndExercisableAutomatically" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AmazonTransactionAgreement2022Member" id="plug_AmazonTransactionAgreement2022Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageRemainingContractualTerm" id="plug_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageRemainingContractualTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PlugPowerLaJvLlcMember" id="plug_PlugPowerLaJvLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NilocoHydrogenHoldingsLlcMember" id="plug_NilocoHydrogenHoldingsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="HidrogeniMember" id="plug_HidrogeniMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ConstructionCapacityPerDay" id="plug_ConstructionCapacityPerDay" type="dtr-types:massItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="WarrantsExercisedDuringPeriod" id="plug_WarrantsExercisedDuringPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePriceCalculationPeriod" id="plug_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePriceCalculationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightExercisable" id="plug_ClassOfWarrantOrRightExercisable" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightExercisableOnVestingThresholdTradingDays" id="plug_ClassOfWarrantOrRightExercisableOnVestingThresholdTradingDays" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="VestingOfFirstWarrantsSharesMember" id="plug_VestingOfFirstWarrantsSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="VestingOfRemainingWarrantsSharesMember" id="plug_VestingOfRemainingWarrantsSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WarrantChargeCapitalized" id="plug_WarrantChargeCapitalized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ShareBasedCompensationAwardTrancheOneToThreeMember" id="plug_ShareBasedCompensationAwardTrancheOneToThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationAwardTrancheFourMember" id="plug_ShareBasedCompensationAwardTrancheFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AvailableForSaleSecuritiesDebtMaturitiesAfterTwelveMonthsAmortizedCost" id="plug_AvailableForSaleSecuritiesDebtMaturitiesAfterTwelveMonthsAmortizedCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AvailableForSaleSecuritiesDebtMaturitiesAfterTwelveMonthsFairValue" id="plug_AvailableForSaleSecuritiesDebtMaturitiesAfterTwelveMonthsFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="OperatingAndFinanceLeaseLiabilityToBePaidNextTwelveMonths" id="plug_OperatingAndFinanceLeaseLiabilityToBePaidNextTwelveMonths" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AlloyCustomProductsLlcAndWesmorCryogenicsLlcMember" id="plug_AlloyCustomProductsLlcAndWesmorCryogenicsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CyrogenicIndustrialSolutionsLlcAlloyCustomProductsLlcAndWesmorCryogenicsLlcMember" id="plug_CyrogenicIndustrialSolutionsLlcAlloyCustomProductsLlcAndWesmorCryogenicsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NumberOfSubsidiaries" id="plug_NumberOfSubsidiaries" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="FinanceObligationDueInFifthYear" id="plug_FinanceObligationDueInFifthYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceObligationDueInSixthYearAndThereafter" id="plug_FinanceObligationDueInSixthYearAndThereafter" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SkPlugHyverseCoLtdMember" id="plug_SkPlugHyverseCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CapacityOfElectrolyzerSystem" id="plug_CapacityOfElectrolyzerSystem" type="dtr-types:energyItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccruedExpensesOnCapitalProjects" id="plug_AccruedExpensesOnCapitalProjects" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="UnrestrictedCash" id="plug_UnrestrictedCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="GainsAndLossesOnDebtSecuritiesAvailableForSaleSecuritiesMember" id="plug_GainsAndLossesOnDebtSecuritiesAvailableForSaleSecuritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncreaseDecreaseInValuationAllowanceForCurrentYearIncreaseInNetOperatingLosses" id="plug_IncreaseDecreaseInValuationAllowanceForCurrentYearIncreaseInNetOperatingLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncreaseDecreaseInValuationAllowanceForCurrentYearNetIncreaseInDeferredTaxAssetsOtherThanNetOperatingLosses" id="plug_IncreaseDecreaseInValuationAllowanceForCurrentYearNetIncreaseInDeferredTaxAssetsOtherThanNetOperatingLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncreaseDecreaseInValuationAllowanceDueToChangeInTaxRates" id="plug_IncreaseDecreaseInValuationAllowanceDueToChangeInTaxRates" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SalesOfEquipmentAndRelatedInfrastructureMember" id="plug_SalesOfEquipmentAndRelatedInfrastructureMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BuildingsAndLeaseholdImprovementsMember" id="plug_BuildingsAndLeaseholdImprovementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LettersOfCreditPledgedAsSecurity" id="plug_LettersOfCreditPledgedAsSecurity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ProvisionForLoanLeaseAndOtherLoss" id="plug_ProvisionForLoanLeaseAndOtherLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SharesIssuedDuringPeriodValueEarnoutsFromPriorAcquisitionsPaidInStock" id="plug_SharesIssuedDuringPeriodValueEarnoutsFromPriorAcquisitionsPaidInStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SharesIssuedDuringPeriodSharesEarnoutsFromPriorAcquisitionsPaidInStock" id="plug_SharesIssuedDuringPeriodSharesEarnoutsFromPriorAcquisitionsPaidInStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PaymentsOfContingentConsideration" id="plug_PaymentsOfContingentConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CustomerRelationshipsTradeNameOtherMember" id="plug_CustomerRelationshipsTradeNameOtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GregoryL.KenausisMember" id="plug_GregoryL.KenausisMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TrdArrExpirationDate" id="plug_TrdArrExpirationDate" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RestrictedCommonUnitsBasedOnPerformanceMember" id="plug_RestrictedCommonUnitsBasedOnPerformanceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WarrantsAndRightsOutstandingAsset" id="plug_WarrantsAndRightsOutstandingAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ContractWithCustomerAssetIncreaseDecreaseRelatedToWarrants" id="plug_ContractWithCustomerAssetIncreaseDecreaseRelatedToWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ContractWithCustomerLiabilityIncreaseDecreaseRelatedToWarrants" id="plug_ContractWithCustomerLiabilityIncreaseDecreaseRelatedToWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OperatingAndFinanceLeaseLiabilityToBePaidYearFive" id="plug_OperatingAndFinanceLeaseLiabilityToBePaidYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OperatingAndFinanceLeaseLiabilityToBePaidAfterYearfive" id="plug_OperatingAndFinanceLeaseLiabilityToBePaidAfterYearfive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PaymentsRelatedToGuarantorObligations" id="plug_PaymentsRelatedToGuarantorObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OutstandingObligationsLeaseAgreements" id="plug_OutstandingObligationsLeaseAgreements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SanjayK.ShresthaMember" id="plug_SanjayK.ShresthaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GeorgeC.McnameeMember" id="plug_GeorgeC.McnameeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CleanH2InfraFundMember" id="plug_CleanH2InfraFundMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AppliedCryoTechnologiesIncMember" id="plug_AppliedCryoTechnologiesIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UndesignatedPreferredStockMember" id="plug_UndesignatedPreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BuildingAndLeaseholdImprovementsMember" id="plug_BuildingAndLeaseholdImprovementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="HydrogenProductionPlantsMember" id="plug_HydrogenProductionPlantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ScheduleOfCapitalCommitmentsRelatedToEquityMethodInvestmentsTableTextBlock" id="plug_ScheduleOfCapitalCommitmentsRelatedToEquityMethodInvestmentsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EquityMethodInvestmentCapitalCommitmentDueNextTwelveMonths" id="plug_EquityMethodInvestmentCapitalCommitmentDueNextTwelveMonths" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EquityMethodInvestmentCapitalCommitmentDueYearTwo" id="plug_EquityMethodInvestmentCapitalCommitmentDueYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ImpairmentOfOtherCurrentAssetsAndLongLivedAsset" id="plug_ImpairmentOfOtherCurrentAssetsAndLongLivedAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisclosureOfAccountingPolicyForRecognizingAndMeasuringImpairmentOfOtherCurrentAssetsAndLongLivedAssets." id="plug_DisclosureOfAccountingPolicyForRecognizingAndMeasuringImpairmentOfOtherCurrentAssetsAndLongLivedAssets." type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OtherCurrentAssetImpairmentCharge" id="plug_OtherCurrentAssetImpairmentCharge" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DeferredTaxAssetsThatDoNotRequireReserve" id="plug_DeferredTaxAssetsThatDoNotRequireReserve" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ExistingStockTradingPlanOneMember" id="plug_ExistingStockTradingPlanOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ExistingStockTradingPlanTwoMember" id="plug_ExistingStockTradingPlanTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EquityMethodInvestmentCapitalCommitmentDue" id="plug_EquityMethodInvestmentCapitalCommitmentDue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FinanceLeasePaymentsOperatingCashFlow" id="plug_FinanceLeasePaymentsOperatingCashFlow" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="Mr.McnameeMember" id="plug_Mr.McnameeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ImpairmentOfOtherCurrentAssetsAndLongLivedAssetsMember" id="plug_ImpairmentOfOtherCurrentAssetsAndLongLivedAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfSecuritiesChangeInUnrealizedGainLossOnAvailableForSaleSecurities" id="plug_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleOfSecuritiesChangeInUnrealizedGainLossOnAvailableForSaleSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AtmAgreementMember" id="plug_AtmAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PeriodOfArrangement" id="plug_PeriodOfArrangement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MaximumCommitmentAdvancePurchaseAmount" id="plug_MaximumCommitmentAdvancePurchaseAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MaximumCommitmentAdvancePurchaseAmountCap" id="plug_MaximumCommitmentAdvancePurchaseAmountCap" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MarketCapitalization" id="plug_MarketCapitalization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="R.baileyMember" id="plug_R.baileyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IfMarketCapitalizationIsLessThan1.0BillionMember" id="plug_IfMarketCapitalizationIsLessThan1.0BillionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IfMarketCapitalizationIsNotLessThan1.0BillionMember" id="plug_IfMarketCapitalizationIsNotLessThan1.0BillionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TaxCutsAndJobsActChangeInTaxRateDeferredTaxAsset" id="plug_TaxCutsAndJobsActChangeInTaxRateDeferredTaxAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PurchaseAmountAllowedPerTradingDayMember" id="plug_PurchaseAmountAllowedPerTradingDayMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PurchaseAmountAllowedPerCalendarWeekMember" id="plug_PurchaseAmountAllowedPerCalendarWeekMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TermOfAgreement" id="plug_TermOfAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="MarketCapitalizationAxis" id="plug_MarketCapitalizationAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MarketCapitalizationDomain" id="plug_MarketCapitalizationDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContractAssetImpairmentLoss" id="plug_ContractAssetImpairmentLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
</xsd:schema>
