Organization and Operations	3 Months Ended
Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Operations	Organization and Operations Fluence Energy, Inc., a Delaware corporation (the “Company”), was formed on June 21, 2021. We conduct our business operations through Fluence Energy, LLC, and its direct and indirect subsidiaries. Fluence Energy, LLC was formed on June 30, 2017 as a joint venture between Siemens Industry, Inc. (“Siemens Industry”), an indirect subsidiary of Siemens AG (“Siemens”), and AES Grid Stability, LLC (“AES Grid Stability”), an indirect subsidiary of The AES Corporation (“AES”), and commenced operations on January 1, 2018. We refer to Siemens Industry and AES Grid Stability as the “Founders” in this Quarterly Report on Form 10-Q for the period ended December 31, 2024 (this “Report”). Fluence Energy, Inc. is a holding company whose sole material assets are the limited liability company interests (the “LLC Interests”) in Fluence Energy, LLC. All of our business is conducted through Fluence Energy, LLC, together with its subsidiaries, and the financial results of Fluence Energy, LLC are consolidated in our financial statements. Fluence Energy, LLC is taxed as a partnership for federal income tax purposes and, as a result, its members, including Fluence Energy, Inc., pay income taxes with respect to their allocable shares of its net taxable income. As of December 31, 2024, Fluence Energy, LLC had subsidiaries operating in Germany, Australia, Philippines, Chile, the Netherlands, the United States, India, Singapore, United Kingdom, Canada, Taiwan, Ireland, and Switzerland. Except where the context clearly indicates otherwise, “Fluence,” “we,” “us,” “our,” or the “Company” refers to Fluence Energy, Inc. and all of its direct and indirect subsidiaries, including Fluence Energy, LLC. The Company’s fiscal year begins on October 1 and ends on September 30. References to “fiscal year 2024” and “fiscal year 2025” refer to the twelve months ended September 30, 2024 and September 30, 2025, respectively. The Company’s chief operating decision maker (“CODM”) is its Chief Executive Officer. The Company’s CODM reviews financial information on a consolidated basis for purposes of making operating decisions, allocating resources, and evaluating financial performance. As such, the Company has determined that it operates in one operating segment, which corresponds to one reportable segment. Secondary Offering and AES Redemption On December 8, 2023, AES Grid Stability, Siemens Pension-Trust e.V. (“Siemens Pension Trust”), and Qatar Holding LLC (“QHL” and together with AES Grid Stability and Siemens Pension Trust in such context, the “Selling Stockholders”) closed an underwritten public offering (the “Offering”) of 18,000,000 shares of Class A common stock, par value $0.00001 per share of Fluence Energy, Inc. (“Class A common stock”). The Company did not sell any of its shares of Class A common stock in the Offering and the Company did not receive any proceeds from the Offering. Pursuant to the terms of the Company’s Registration Rights Agreement, dated as of November 1, 2021, by and among the Company and the Original Equity Owners (as defined therein), the Company paid $0.7 million in certain expenses of the Selling Stockholders related to the Offering, while the Selling Stockholders paid all applicable underwriting discounts and commissions. In conjunction with the Offering, AES Grid Stability exercised its redemption right pursuant to the terms of the Third Amended and Restated Limited Liability Agreement of Fluence Energy, LLC, dated October 27, 2021, as may be amended from time to time (the “Fluence Energy, LLC Agreement”) with respect to 7,087,500 LLC Interests held by AES Grid Stability, together with the corresponding cancellation of an equivalent number of shares of Class B-1 common stock, par value $0.00001 per share of the Company (the “AES Redemption”). The Company elected to settle the AES Redemption through the issuance of 7,087,500 shares of the Company’s Class A common stock. The AES Redemption settled on December 8, 2023. All of the 7,087,500 shares issued to AES Grid Stability in connection with the AES Redemption were sold in the Offering. The AES Redemption increased the beneficial ownership interest of the Company in Fluence Energy, LLC to 71.12% as of December 8, 2023. The impact of the change in ownership interest did not result in a change in control. The AES Redemption has been accounted for as an equity transaction and the carrying amount of the non-controlling interest has been adjusted. Refer to “condensed consolidated statements of changes in stockholders’ equity” included herein for more information on the impacts of the redemption to stockholder’s equity.

Fluence Energy, Inc., a Delaware corporation (the “Company”), was formed on June 21, 2021. We conduct our business operations through Fluence Energy, LLC, and its direct and indirect subsidiaries. Fluence Energy, LLC was formed on June 30, 2017 as a joint venture between Siemens Industry, Inc. (“Siemens Industry”), an indirect subsidiary of Siemens AG (“Siemens”), and AES Grid Stability, LLC (“AES Grid Stability”), an indirect subsidiary of The AES Corporation (“AES”), and commenced operations on January 1, 2018. We refer to Siemens Industry and AES Grid Stability as the “Founders” in this Quarterly Report on Form 10-Q for the period ended December 31, 2024 (this “Report”).

Fluence Energy, Inc. is a holding company whose sole material assets are the limited liability company interests (the “LLC Interests”) in Fluence Energy, LLC. All of our business is conducted through Fluence Energy, LLC, together with its subsidiaries, and the financial results of Fluence Energy, LLC are consolidated in our financial statements. Fluence Energy, LLC is taxed as a partnership for federal income tax purposes and, as a result, its members, including Fluence Energy, Inc., pay income taxes with respect to their allocable shares of its net taxable income. As of December 31, 2024, Fluence Energy, LLC had subsidiaries operating in Germany, Australia, Philippines, Chile, the Netherlands, the United States, India, Singapore, United Kingdom, Canada, Taiwan, Ireland, and Switzerland. Except where the context clearly indicates otherwise, “Fluence,” “we,” “us,” “our,” or the “Company” refers to Fluence Energy, Inc. and all of its direct and indirect subsidiaries, including Fluence Energy, LLC.

The Company’s fiscal year begins on October 1 and ends on September 30. References to “fiscal year 2024” and “fiscal year 2025” refer to the twelve months ended September 30, 2024 and September 30, 2025, respectively.

The Company’s chief operating decision maker (“CODM”) is its Chief Executive Officer. The Company’s CODM reviews financial information on a consolidated basis for purposes of making operating decisions, allocating resources, and evaluating financial performance. As such, the Company has determined that it operates in one operating segment, which corresponds to one reportable segment.

On December 8, 2023, AES Grid Stability, Siemens Pension-Trust e.V. (“Siemens Pension Trust”), and Qatar Holding LLC (“QHL” and together with AES Grid Stability and Siemens Pension Trust in such context, the “Selling Stockholders”) closed an underwritten public offering (the “Offering”) of 18,000,000 shares of Class A common stock, par value $0.00001 per share of Fluence Energy, Inc. (“Class A common stock”). The Company did not sell any of its shares of Class A common stock in the Offering and the Company did not receive any proceeds from the Offering. Pursuant to the terms of the Company’s Registration Rights Agreement, dated as of November 1, 2021, by and among the Company and the Original Equity Owners (as defined therein), the Company paid $0.7 million in certain expenses of the Selling Stockholders related to the Offering, while the Selling Stockholders paid all applicable underwriting discounts and commissions.

In conjunction with the Offering, AES Grid Stability exercised its redemption right pursuant to the terms of the Third Amended and Restated Limited Liability Agreement of Fluence Energy, LLC, dated October 27, 2021, as may be amended from time to time (the “Fluence Energy, LLC Agreement”) with respect to 7,087,500 LLC Interests held by AES Grid Stability, together with the corresponding cancellation of an equivalent number of shares of Class B-1 common stock, par value $0.00001 per share of the Company (the “AES Redemption”). The Company elected to settle the AES Redemption through the issuance of 7,087,500 shares of the Company’s Class A common stock. The AES Redemption settled on December 8, 2023. All of the 7,087,500 shares issued to AES Grid Stability in connection with the AES Redemption were sold in the Offering.

The AES Redemption increased the beneficial ownership interest of the Company in Fluence Energy, LLC to 71.12% as of December 8, 2023. The impact of the change in ownership interest did not result in a change in control. The AES Redemption has been accounted for as an equity transaction and the carrying amount of the non-controlling interest has been adjusted. Refer to “condensed consolidated statements of changes in stockholders’ equity” included herein for more information on the impacts of the redemption to stockholder’s equity.