7Baggers

Fluence Energy, Inc.
(NASDAQ:FLNC) 

FLNC stock logo

Fluence Energy, Inc. provides energy storage products and services, and digital applications for renewables and storage applications worldwide. The company sells energy storage products with integrated hardware, software, and digital intelligence, as well as engineering and delivery services to supp...

Founded: 2018
CEO: Manuel Perez Dubuc  
Sector: Utilities
Industry: Utilities—Renewable

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At a glance:
Bull Thesis:
Bear Thesis:
Main Competitors:
Moat:
Income Statements:
Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 
                      
      revenue
    424,726,000 293,002,000 757,677,000 566,926,000 264,407,000 116,199,000 745,438,000 328,091,000 280,652,000 247,382,000 521,841,000 431,616,000 405,110,000 209,454,000 293,421,000 115,999,000 115,798,000 27,054,000 
      yoy
    60.63% 152.16% 1.64% 72.80% -5.79% -53.03% 42.85% -23.99% -30.72% 18.11% 77.85% 272.09% 249.84% 674.21%     
      qoq
    44.96% -61.33% 33.65% 114.41% 127.55% -84.41% 127.20% 16.90% 13.45% -52.59% 20.90% 6.54% 93.41% -28.62% 152.95% 0.17% 328.03%  
      revenue from related parties
    40,165,000 182,232,000 284,214,000 35,607,000 167,211,000 70,589,000 482,710,000 155,226,000 342,489,000 116,574,000 151,140,000 104,735,000 293,076,000 101,006,000 148,561,000 123,011,000 226,926,000 147,833,000 
      total revenue
    464,891,000 475,234,000 1,041,891,000 602,533,000 431,618,000 186,788,000 1,228,148,000 483,317,000 623,141,000 363,956,000 672,981,000 536,351,000 698,186,000 310,460,000 441,982,000 239,010,000 342,724,000 174,887,000 
      cost of goods and services
    418,261,000 452,185,000 898,988,000 513,434,000 389,036,000 165,587,000 1,070,679,000 400,272,000 558,961,000 327,570,000 596,699,000 514,531,000 667,373,000 298,420,000 431,243,000 244,207,000 357,472,000 228,036,000 
      gross profit
    46,630,000 23,049,000 142,903,000 89,099,000 42,582,000 21,201,000 157,469,000 83,045,000 64,180,000 36,386,000 76,282,000 21,820,000 30,813,000 12,040,000 10,739,000 -5,197,000 -14,748,000 -53,149,000 
      yoy
    9.51% 8.72% -9.25% 7.29% -33.65% -41.73% 106.43% 280.59% 108.29% 202.21% 610.33% -519.86% -308.93% -122.65%     
      qoq
    102.31% -83.87% 60.39% 109.24% 100.85% -86.54% 89.62% 29.39% 76.39% -52.30% 249.60% -29.19% 155.92% 12.11% -306.64% -64.76% -72.25%  
      gross margin %
    10.98% 7.87% 18.86% 15.72% 16.10% 18.25% 21.12% 25.31% 22.87% 14.71% 14.62% 5.06% 7.61% 5.75% 3.66% -4.48% -12.74% -196.46% 
      operating expenses:
                      
      research and development
    21,070,000 18,541,000 20,892,000 26,011,000 22,119,000 17,195,000 18,352,000 14,976,000 17,427,000 15,440,000 14,676,000 9,918,000 22,551,000 19,162,000 17,915,000 18,129,000 13,340,000 10,758,000 
      sales and marketing
    23,269,000 22,031,000 20,276,000 19,822,000 21,189,000 18,202,000 22,571,000 14,773,000 15,792,000 10,706,000 11,815,000 10,106,000 10,401,000 8,792,000 9,560,000 8,398,000 6,191,000 13,059,000 
      general and administrative
    37,226,000 41,848,000 49,346,000 35,603,000 41,412,000 36,707,000 46,095,000 45,106,000 44,067,000 37,728,000 35,118,000 38,145,000 31,778,000 31,267,000 32,939,000 27,334,000 25,237,000 31,201,000 
      depreciation and amortization
    4,275,000 3,749,000 3,962,000 3,628,000 2,943,000 2,815,000 2,837,000 3,624,000 2,482,000 2,483,000 2,475,000 2,267,000 2,669,000 2,424,000 2,216,000 1,972,000 1,493,000 1,427,000 
      interest expense
    2,762,000 1,372,000 3,377,000 1,083,000 391,000      -8,861,000 1,513,000 1,144,000 816,000 80,000 573,000 676,000 682,000 
      other expense
    -14,276,000 5,985,000 -1,078,750 -8,519,000 -1,547,000 5,751,000 -6,866,000 562,000 215,000          
      income before income taxes
    -27,696,000 -70,477,000 46,110,000 11,471,000 -43,925,000 -58,728,000 75,602,000 5,304,000 -14,542,000 -26,791,000 11,425,000 -36,363,000 -37,523,000 -37,807,000 -54,335,000 -61,808,000 -60,576,000 -111,102,000 
      income tax expense
    1,543,000  22,048,000 4,577,000   7,878,000 4,229,000   6,607,000 -1,318,000 -126,000 -614,000 1,850,000 -979,000 128,000 358,000 
      net income
    -29,239,000 -62,588,000 24,062,000 6,894,000 -41,932,000 -57,013,000 67,724,000 1,075,000 -12,876,000 -25,556,000 4,818,000 -35,045,000 -37,397,000 -37,193,000 -56,185,000 -60,829,000 -60,704,000 -111,460,000 
      yoy
    -30.27% 9.78% -64.47% 541.30% 225.66% 123.09% 1305.65% -103.07% -65.57% -31.29% -108.58% -42.39% -38.39% -66.63%     
      qoq
    -53.28% -360.11% 249.03% -116.44% -26.45% -184.18% 6199.91% -108.35% -49.62% -630.43% -113.75% -6.29% 0.55% -33.80% -7.63% 0.21% -45.54%  
      net income margin %
    -6.88% -21.36% 3.18% 1.22% -15.86% -49.06% 9.09% 0.33% -4.59% -10.33% 0.92% -8.12% -9.23% -17.76% -19.15% -52.44% -52.42% -411.99% 
      net loss attributable to non-controlling interest
    -8,312,000 -17,518,000   -10,886,000 -15,547,000   -3,707,000 -8,813,000 1,550,000 -11,655,000 -12,542,000 -12,551,000 -19,036,000 -41,482,000 -41,519,000  
      net loss attributable to fluence energy, inc.
    -20,927,000 -45,070,000   -31,046,000 -41,466,000   -9,169,000 -16,743,000 3,268,000 -23,390,000 -24,855,000 -24,642,000 -37,149,000 -19,347,000 -19,185,000 -28,805,000 
      weighted-average number of class a common shares outstanding:
                      
      basic
    132,542,675,000 131,522,223,000 130,307,162,000 130,723,258,000 129,985,932,000 129,482,668,000 126,180,011,000 127,910,081,000           
      diluted
    132,542,675,000 131,522,223,000 130,307,162,000 183,645,493,000 129,985,932,000 129,482,668,000 184,034,832,000 184,219,065,000           
      loss per share of class a common stock:
                      
      basic
    -0.16 -0.34   -0.24 -0.32             
      diluted
    -0.16 -0.34   -0.24 -0.32             
      income tax benefit
     -7,889,000   -1,993,000 -1,715,000   -1,666,000 -1,235,000         
      net income attributable to non-controlling interest
      6,116,000 642,000   19,881,000 290,000           
      net income attributable to fluence energy, inc.
      17,946,000 6,252,000   47,843,000 785,000           
      income per share of class a common stock:
                      
      basic
      0.14 0.05   0.38 0.01           
      diluted
      0.14 0.01   0.33            
      interest income
         -741,000 -1,122,000 -1,300,000 -1,261,000 -1,993,000         
      impact of foreign currency translation and cash flow hedges, net of tax
          -577.75 -2,343           
      total other comprehensive income
          -577.75 -2,343 -1,603 1,635 576 5,079 -1,469 -3,585 3,432 1,631 -20 299 
      total comprehensive loss
          -9,917 -1,268 -14,479 -23,921 5,394 -29,966 -38,866 -40,778 -52,753 -59,198 -60,724 -111,161 
      comprehensive loss attributable to non-controlling interest
          -3,227.75 -384 -4,170 -8,358 1,746 -9,963 -13,036 -13,761 -17,875 -40,367 -41,533 -82,570 
      total comprehensive loss attributable to fluence energy, inc.
          -6,689.25 -884 -10,309 -15,563 3,648 -20,003 -25,830 -27,017 -34,879 -18,831 -19,191 -28,591 
      weighted-average number of class a common shares outstanding
                      
      basic and diluted
            126,843,301,000 121,113,282,000 116,448,602,000 117,456,282,000 116,266,838,000 115,393,437,000 69,714,054,000 55,625,566,000 54,143,275,000 54,143,275,000 
      loss per share of class a common stock
                      
      basic and diluted
            -0.07 -0.14 0.03 -0.2 -0.21 -0.21 -0.27 -0.35 -0.35 -0.53 
      foreign currency translation gain, net of income tax expense of (0.2) million in the three months ended march 31, 2024, 0.1 million in the six months ended march 31, 2024, and 0.1 million in the three months ended march 31, 2023, and 0.4 million six months ended march 31, 2023
            -1,603          
      other income
             -1,187,000 4,146,500 3,766,000 207,000 12,614,000 20,750 -205,000 1,109,000 -826,000 
      foreign currency translation gain, net of income tax expense of 0.3 million in 2023 and 2022, respectively
             1,635         
      foreign currency translation gain, net of income tax expense of 0.0 million in the three months ended june 30, 2023, 0.4 million in the nine months ended june 30, 2023, and 0 in the three months and nine months ended june 30, 2022
              6.25 5,079       
      foreign currency translation gain, net of income tax expense of 0.1 million in the three months ended march 31, 2023, 0.4 million in the six months ended march 31, 2023, and 0 in the three months and six months ended march 31, 2022
                -1,469      
      foreign currency translation gain, net of income tax expense of 0.3 million in 2022, and 0 in 2021
                 -3,585     
      foreign currency translation gain, net of income tax benefit of 0 in each period
                  477.5 1,631 -20 299 
      net loss attributable to non-controlling interests
                     -82,655,000 
      weighted-average number of class a common shares outstanding:
                      
      basic and diluted
            126,843,301,000 121,113,282,000 116,448,602,000 117,456,282,000 116,266,838,000 115,393,437,000 69,714,054,000 55,625,566,000 54,143,275,000 54,143,275,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 
                        
        assets
                        
        current assets:
                        
        cash and cash equivalents
      387,299,000 452,563,000 690,768,000 436,322,000 568,622,000 607,356,000 448,685,000 388,242,000 411,798,000 317,614,000 345,896,000 297,709,000 194,357,000 286,735,000 357,296,000 676,951,000 651,948,000 632,143,000 
        restricted cash
      25,590,000 25,211,000 23,862,000 23,566,000 18,724,000 24,384,000 46,089,000 101,988,000 106,605,000 135,864,000 106,835,000 108,387,000 108,224,000 55,233,000 62,425,000 75,093,000 70,740,000  
        trade receivables
      180,132,000 288,900,000 272,820,000 152,557,000 148,964,000 146,956,000 216,458,000 93,497,000 86,798,000 172,021,000 103,397,000 153,156,000 337,535,000 108,591,000 86,770,000    
        unbilled receivables
      284,711,000 252,179,000 239,594,000 151,361,000 112,994,000 156,076,000 172,115,000 96,002,000 132,955,000 182,232,000 192,064,000 160,596,000 152,774,000 224,484,000 138,525,000 101,139,000 81,300,000 86,933,000 
        receivables from related parties
      137,534,000 223,029,000 200,748,000 158,376,000 233,837,000 252,302,000 362,523,000 100,945,000 63,639,000 75,427,000 58,514,000 58,971,000 88,385,000 56,678,000 112,027,000 49,318,000 37,034,000 48,388,000 
        advances to suppliers
      207,218,000 120,747,000 126,778,000 214,055,000 181,189,000 175,485,000 174,532,000 155,648,000 110,759,000 112,570,000 107,947,000 70,507,000 65,966,000 55,191,000 54,765,000 62,197,000 49,270,000 40,586,000 
        inventory
      764,158,000 540,638,000 455,015,000 654,301,000 698,277,000 543,415,000 182,601,000 469,934,000 309,059,000 564,466,000 224,903,000 513,551,000 763,215,000 1,083,607,000 652,735,000 453,713,000 351,985,000 442,356,000 
        other current assets
      95,850,000 83,462,000 54,671,000 59,158,000 68,714,000 77,654,000 46,519,000 42,453,000 45,867,000 50,054,000 31,074,000 26,592,000 27,922,000 29,747,000 26,635,000 39,140,000 47,409,000 74,793,000 
        total current assets
      2,082,492,000 1,986,729,000 2,064,256,000 1,849,696,000 2,031,321,000 1,983,628,000 1,680,443,000 1,503,960,000 1,322,731,000 1,665,499,000 1,194,960,000 1,389,469,000 1,808,401,000 2,010,128,000 1,601,533,000 1,550,747,000 1,415,920,000 1,381,335,000 
        non-current assets:
                        
        property and equipment
      41,766,000 45,891,000 50,320,000 46,321,000 19,914,000 18,845,000 15,350,000 13,586,000 13,512,000 13,427,000 12,771,000 12,781,000 13,403,000 15,167,000 13,755,000 9,292,000 8,496,000 8,567,000 
        intangible assets
      64,126,000 63,733,000 63,403,000 62,273,000 59,428,000 58,589,000 60,002,000 58,628,000 57,172,000 56,780,000 55,752,000 55,438,000 49,676,000 51,482,000 51,696,000 53,496,000 34,439,000 35,145,000 
        goodwill
      28,514,000 28,680,000 28,584,000 28,665,000 26,603,000 26,199,000 27,482,000 26,337,000 26,266,000 27,535,000 26,020,000 26,286,000 25,944,000 25,816,000 24,851,000 25,214,000 9,168,000 9,167,000 
        deferred income tax asset
      4,076,000 4,039,000 4,046,000 2,525,000 7,621,000 8,076,000 8,880,000 85,000 85,000 86,000 86,000 2,571,000 2,571,000 2,571,000 3,028,000 1,184,000 1,184,000 1,184,000 
        other non-current assets
      126,923,000 140,580,000 146,391,000 85,670,000 128,259,000 118,640,000 110,031,000 87,357,000 110,077,000 52,167,000 31,639,000 17,292,000 17,777,000 17,839,000 36,820,000 12,349,000 2,525,000 47,256,000 
        total non-current assets
      265,405,000 282,923,000 292,744,000 225,454,000 241,825,000 230,349,000 221,745,000 185,993,000 207,112,000 149,995,000 157,189,000 175,269,000 139,186,000 141,799,000 144,121,000 121,828,000 85,016,000 101,319,000 
        total assets
      2,347,897,000 2,269,652,000 2,357,000,000 2,075,150,000 2,273,146,000 2,213,977,000 1,902,188,000 1,689,953,000 1,529,843,000 1,815,494,000 1,352,149,000 1,564,738,000 1,947,587,000 2,151,927,000 1,745,654,000 1,672,575,000 1,500,936,000 1,482,654,000 
        liabilities and stockholders’ equity
                        
        current liabilities:
                        
        accounts payable
      189,078,000 135,246,000 321,004,000 255,645,000 232,932,000 101,858,000 436,744,000 321,880,000 244,191,000 318,548,000 62,899,000 165,990,000 399,991,000 505,620,000 304,898,000 220,586,000 121,620,000 92,802,000 
        deferred revenue
      805,530,000 804,489,000 640,457,000 545,222,000 648,090,000 572,735,000 274,499,000 409,612,000 398,639,000 382,832,000 273,164,000 452,069,000 584,425,000 469,098,000 273,073,000 371,030,000 222,815,000 145,765,000 
        deferred revenue with related parties
      66,379,000 58,615,000 79,916,000 47,790,000 34,774,000 33,169,000 38,162,000 36,742,000           
        personnel related liabilities
      35,410,000 27,109,000 31,850,000 22,546,000 25,848,000 25,538,000 58,584,000 41,435,000 25,784,000 18,783,000 52,174,000 40,097,000 27,234,000 14,410,000 21,286,000 17,462,000 15,935,000 22,990,000 
        accruals and provisions
      254,610,000 278,024,000 246,235,000 221,508,000 376,694,000 476,985,000 338,311,000 213,339,000 159,613,000 172,009,000 172,223,000 95,737,000 106,447,000 160,187,000 183,814,000 135,410,000 217,125,000 214,838,000 
        taxes payable
      11,252,000 14,302,000 30,317,000 7,019,000 13,255,000 40,273,000 57,929,000 32,619,000 22,023,000 30,994,000 29,465,000 26,127,000 17,295,000 7,898,000 11,114,000 11,743,000 17,275,000 17,764,000 
        other current liabilities
      89,066,000 21,730,000 20,590,000 25,104,000 13,883,000 10,809,000 24,246,000 15,365,000 11,150,000 12,087,000 16,711,000 13,764,000 12,819,000 9,441,000 7,198,000 4,374,000 3,334,000 2,175,000 
        total current liabilities
      1,451,325,000 1,339,515,000 1,370,369,000 1,124,834,000 1,345,476,000 1,261,367,000 1,258,835,000 1,124,706,000 973,113,000 1,251,922,000 745,663,000 954,219,000 1,344,965,000 1,526,354,000 1,109,463,000 994,038,000 774,777,000 702,355,000 
        non-current liabilities:
                        
        deferred income tax liability
      9,224,000 9,545,000 9,530,000 7,507,000 6,860,000 6,624,000 7,114,000 5,143,000 5,159,000 5,370,000 4,794,000 3,544,000 3,499,000 3,467,000 4,876,000    
        convertible senior notes
      391,707,000 391,254,000 390,804,000 390,356,000 389,912,000 389,096,000             
        other non-current liabilities
      37,458,000 41,114,000 37,449,000 31,609,000 31,835,000 27,590,000 29,100,000 21,927,000 19,835,000 19,047,000 17,338,000 10,147,000 7,679,000 1,279,000 1,096,000 7,454,000   
        total non-current liabilities
      438,389,000 441,913,000 437,783,000 429,472,000 428,607,000 423,310,000 36,214,000 27,070,000 24,994,000 24,417,000 50,156,000 65,070,000 34,627,000 26,556,000 6,983,000 7,454,000 702,000 2,199,000 
        total liabilities
      1,889,714,000 1,781,428,000 1,808,152,000 1,554,306,000 1,774,083,000 1,684,677,000 1,295,049,000 1,151,776,000 998,107,000 1,276,339,000 795,819,000 1,019,289,000 1,379,592,000 1,552,910,000 1,116,446,000 1,001,492,000 775,479,000 704,554,000 
        stockholders’ equity:
                        
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of march 31, 2026 and september 30, 2025
                        
        class a common stock, 0.00001 par value per share...
      1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000  1,000   
        class b-1 common stock, 0.00001 par value per share...
                      1,000 1,000 
        class b-2 common stock, 0.00001 par value per share...
                        
        treasury stock
      -12,930,000 -12,568,000 -10,213,000 -9,950,000 -9,950,000 -9,856,000  -9,040,000 -7,885,000 -7,797,000  -6,632,000 -5,301,000 -5,301,000  -4,991,000   
        additional paid-in capital
      640,755,000 635,552,000  623,228,000 615,996,000 611,982,000  627,923,000 617,793,000 610,230,000  573,850,000 563,222,000 554,924,000  530,747,000 289,428,000 281,347,000 
        accumulated other comprehensive income
      6,052,000 9,835,000  11,813,000 6,083,000 222,000  1,572,000 3,241,000 4,382,000  2,822,000 -565,000 410,000  515,000  4,000 
        accumulated deficit
      -265,759,000 -244,832,000  -217,708,000 -223,960,000 -192,914,000  -199,291,000 -200,076,000 -190,907,000  -177,431,000 -154,041,000 -129,186,000  -67,337,000 -47,990,000 -28,805,000 
        total stockholders’ equity attributable to fluence energy, inc.
      368,119,000 387,988,000  407,384,000 388,170,000 409,435,000  421,165,000 413,074,000 415,909,000  392,610,000 403,316,000 420,848,000     
        non-controlling interests
      90,064,000 100,236,000  113,460,000 110,893,000 119,865,000  117,012,000 118,662,000 123,246,000  152,839,000 164,679,000 178,169,000    525,553,000 
        total stockholders’ equity
      458,183,000 488,224,000  520,844,000 499,063,000 529,300,000  538,177,000 531,736,000 539,155,000  545,449,000 567,995,000 599,017,000     
        total liabilities and stockholders’ equity
      2,347,897,000 2,269,652,000  2,075,150,000 2,273,146,000 2,213,977,000  1,689,953,000 1,529,843,000 1,815,494,000  1,564,738,000 1,947,587,000 2,151,927,000     
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of december 31, 2025 and september 30, 2025
                        
        current portion of notes receivable - pledged as collateral
            30,921,000 55,251,000 55,251,000 55,251,000 24,330,000        
        liabilities, and stockholders’ equity
                        
        current portion of borrowings against note receivable - pledged as collateral
            30,360,000 53,714,000 52,667,000 51,621,000 22,539,000        
        commitments and contingencies
                        
        preferred stock, 0.00001 per share, 10,000,000 share authorized; no shares issued and outstanding as of september 30, 2025 and 2024
                        
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of june 30, 2025 and september 30, 2024
                        
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of march 31, 2025 and september 30, 2024
                        
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of december 31, 2024 and september 30, 2024
                        
        note receivable - pledged as collateral
                30,921,000 55,251,000 24,330,000 24,330,000     
        borrowings against note receivable - pledged as collateral
                28,024,000 49,505,000 21,602,000 21,142,000     
        preferred stock, 0.00001 per share, 10,000,000 share authorized; no shares issued and outstanding as of september 30, 2024 and 2023
                        
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of june 30, 2024 and september 30, 2023
                        
        deferred revenue and payables with related parties
              59,046,000          
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of march 31, 2024 and september 30, 2023
                        
        payables and deferred revenue with related parties
               265,048,000 116,488,000 158,817,000 195,220,000 358,064,000 306,348,000 233,433,000 176,673,000 206,021,000 
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of december 31, 2023 and september 30, 2023
                        
        short-term investments
                  70,023,000 109,862,000 110,355,000    
        preferred stock, 0.00001 per share, 10,000,000 share authorized; no shares issued and outstanding as of september 30, 2023 and 2022
                        
        right of use asset - operating leases
                 3,289,000       
        debt issuance cost
                 2,361,000 2,361,000 2,590,000 2,818,000 2,793,000 2,954,000  
        current portion of operating lease liabilities
                 1,618,000 1,534,000 1,636,000 1,732,000    
        operating lease liabilities, net of current portion
                 1,874,000 1,847,000 668,000 1,011,000    
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of june 30, 2023 and september 30, 2022
                        
        rou asset - operating leases
                  3,124,000 2,004,000     
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of march 31, 2023 and september 30, 2022
                        
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of december 31, 2022 and september 30, 2022
                        
        operating lease right of use assets
                    2,403,000    
        liabilities, mezzanine equity, and stockholders’/members’ equity
                        
        borrowing from line of credit
                        
        borrowing from related parties
                        
        mezzanine equity
                        
        total mezzanine equity
                        
        stockholders’ equity/members’ equity
                        
        members’ capital contributions
                        
        current assets
                        
        trade receivables, net of allowance
                     93,196,000 126,234,000 56,136,000 
        non-current assets
                        
        liabilities, stockholders’ equity, members’ deficit, and mezzanine equity
                        
        current liabilities
                        
        non-current liabilities
                        
        stockholders’ equity / members’ deficit
                        
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of june 30, 2022
                        
        total stockholders’ equity attributable to fluence energy, inc./ members’ deficit
                     458,935,000 241,437,000 252,547,000 
        non-controlling interest
                     212,148,000 484,020,000  
        total stockholders’ equity and members’ deficit
                     671,083,000 725,457,000 778,100,000 
        total liabilities, stockholders’ equity, members’ deficit, and mezzanine equity
                     1,672,575,000 1,500,936,000 1,482,654,000 
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of march 31, 2022
                        
        accumulated other comprehensive loss
                      -2,000  
        preferred stock, 0.00001 per share, 10,000,000 shares authorized; no shares issued and outstanding as of december 31, 2021.
                        
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 
                          
          operating activities
                          
          net loss
        -29,239,000 -62,588,000  6,894,000 -41,932,000 -57,013,000  1,075,000 -12,876,000 -25,556,000 4,818,000 -35,046,000 -37,397,000 -37,193,000 -56,185,000 -60,828,000 -60,704,000 -111,460,000 
          adjustments to reconcile net loss to net cash from operating activities:
                          
          depreciation and amortization
        10,732,000 8,794,000 10,414,000 8,255,000 6,189,000 4,485,000 4,087,000 4,424,000 3,088,000 2,883,000 2,926,000 2,646,000 2,669,000 2,424,000 2,216,000 1,972,000 1,493,000 1,427,000 
          amortization of debt issuance costs
        1,151,000 1,148,000 1,145,000 1,128,000 1,127,000 817,000 1,671,000 383,000 355,000 682,000 457,000 228,000 229,000 228,000 207,000 206,000 137,000 
          inventory provision
        18,000 -7,053,000 7,770,000 -337,000 -2,757,000 2,283,000 8,505,000 1,497,000 13,672,000 298,000  -675,000 -92,000 -330,000 -10,800,000   3,517,000 
          stock-based compensation
        3,942,000 5,288,000 4,081,000 6,367,000 3,826,000 5,266,000 5,469,000            
          deferred income taxes
        -175,000 28,000 537,000 5,369,000 511,000 -66,000 -7,014,000 295,000 3,818,000 -325,000 -951,000     
          changes in operating assets and liabilities:
                          
          trade receivables
        108,573,000 -16,013,000 -121,476,000 2,851,000 1,767,000 60,143,000 -119,388,000 -4,942,000 80,303,000 -70,550,000 52,639,000 178,397,000 -222,612,000 -21,821,000 17,182,000 33,227,000 -70,098,000 -9,472,000 
          unbilled receivables
        -31,488,000 -11,822,000 -90,402,000 -34,202,000 45,834,000 10,725,000 -72,329,000 37,207,000 47,974,000 11,895,000 -33,188,000 -8,559,000 77,203,000 -85,959,000 -37,386,000 -19,839,000 5,633,000 15,042,000 
          receivables from related parties
        85,493,000 -22,280,000 -42,378,000 75,488,000 18,472,000 110,198,000 -261,539,000 -44,365,000 18,823,000 -16,882,000 -1,821,000 31,749,000 -31,666,000 55,349,000 -62,710,000 -12,284,000 11,354,000 -15,026,000 
          advances to suppliers
        -86,590,000 6,072,000 87,528,000 -29,095,000 -3,727,000 -5,593,000 -17,259,000 -10,495,000 -39,720,000 3,216,000 -28,348,000 -4,349,000 -11,826,000 8,033,000 7,432,000 13,323,000 -34,934,000 -30,845,000 
          inventory
        -222,261,000 -77,365,000 190,965,000 50,543,000 -151,474,000 -368,763,000 279,647,000 -161,534,000 240,026,000 -336,408,000 286,785,000 249,446,000 327,077,000 -430,541,000 -188,222,000 -115,057,000 93,888,000 -56,086,000 
          other current assets
        -12,664,000 -28,506,000 -111,000 17,374,000 10,790,000 -7,640,000 24,395,000 12,509,000 819,000 -48,709,000 -42,020,000 2,044,000 6,655,000 -3,507,000 1,482,000 7,273,000 -7,257,000 -134,000 
          other non-current assets
        12,427,000 3,222,000 -63,315,000 -842,000 -11,080,000 -11,582,000 -20,071,000 -22,366,000 -12,122,000 26,459,000 14,352,000 -30,692,000 -667,000 375,000 -17,652,000 -17,691,000 35,506,000 -35,371,000 
          accounts payable
        54,750,000 -182,749,000 61,614,000 22,018,000 130,733,000 -333,593,000 113,860,000 75,122,000 -74,205,000 255,347,000 -103,314,000 -232,296,000 -107,275,000 200,722,000 84,313,000 98,580,000 28,818,000 -59,244,000 
          deferred revenue with related parties
        7,768,000 -21,301,000 32,127,000 12,974,000 1,583,000 -4,959,000 1,363,000            
          deferred revenue
        2,259,000 163,257,000 97,405,000 -118,622,000 66,397,000 316,723,000 -140,869,000 16,505,000 15,517,000 99,051,000 -174,958,000 -131,983,000 103,981,000 196,026,000 -97,958,000 147,536,000 77,050,000 74,400,000 
          accruals and provisions
        -24,114,000 33,761,000  -159,087,000 -98,336,000 139,064,000             
          taxes payable
        -2,993,000 -16,141,000 28,296,000 -17,271,000 -31,382,000 -7,534,000 20,886,000 11,559,000 -8,208,000 -1,438,000 3,749,000 8,302,000 6,918,000 -3,216,000 -629,000 -5,533,000 -489,000 4,872,000 
          other current liabilities
        4,433,000 -6,294,000 7,312,000 -1,280,000 3,017,000 -67,354,000 -4,240,000 20,782,000 7,139,000 -5,496,000 14,874,000 14,082,000 15,317,000 -4,806,000 8,031,000 -2,042,000 5,167,000 -4,794,000 
          other non-current liabilities
        -3,135,000 3,750,000 5,396,000 -2,390,000 4,258,000 3,161,000 2,564,000 1,522,000 1,432,000 -28,792,000 6,692,000 3,361,000 8,369,000 -298,000 -1,688,000 -352,000 -1,497,000 -182,000 
          net cash from operating activities
        -121,113,000 -226,792,000 265,743,000 -153,865,000 -46,184,000 -211,232,000 10,529,000 -21,092,000 70,885,000 19,363,000 48,560,000 2,924,000 -74,513,000 -88,898,000 -221,442,000 80,053,000 50,555,000 -191,551,000 
          capital expenditures
        -2,482,000 -5,827,000 -4,860,000 -3,562,000 -4,353,000 -2,109,000 -3,277,000 -2,365,000 -1,005,000 -1,468,000 -1,112,000 -790,000 1,409,000 -2,496,000 -5,259,000 -1,404,000 -401,000 -870,000 
          free cash flows
        -123,595,000 -232,619,000 260,883,000 -157,427,000 -50,537,000 -213,341,000 7,252,000 -23,457,000 69,880,000 17,895,000 47,448,000 2,134,000 -73,104,000 -91,394,000 -226,701,000 78,649,000 50,154,000 -192,421,000 
          investing activities
                          
          capital expenditures on software and other
                          
          purchase of property and equipment
        -2,482,000 -5,827,000 -4,860,000 -3,562,000 -4,353,000 -2,109,000 -3,277,000 -2,365,000 -1,005,000 -1,468,000 -1,112,000 -790,000 1,409,000 -2,496,000 -5,259,000 -1,404,000 -401,000 -870,000 
          net cash from investing activities
        -6,758,000 -9,348,000 -9,752,000 -7,287,000 -7,574,000 -5,186,000 -5,531,000 -5,953,000 -4,895,000 -2,596,000 -3,063,000   -6,331,000 -115,403,000 -30,619,000 -1,525,000 -870,000 
          financing activities
                          
          class a common stock withheld related to settlement of employee taxes for stock-based compensation awards
        -362,000 -2,355,000 -263,000 -94,000 -396,000 -420,000 -1,155,000           
          proceeds from issuance of 2030 convertible senior notes
          400,000,000             
          purchases of capped calls related to 2030 convertible senior notes
          -29,000,000             
          payment for debt issuance costs
                          
          purchases under supply chain financing arrangements
                          
          proceeds from exercise of stock options
        873,000 1,506,000 403,000 527,000 818,000 422,000 963,000 2,724,000 532,000 1,116,000 1,173,000 3,074,000 558,000 2,398,000 1,870,000    
          distribution to aes grid stability
                        
          principal payments on finance leases
        -1,448,000 -938,000 -1,905,000                
          net cash from financing activities
        68,400,000 -1,787,000 -1,765,000 -468,000 -1,718,000 360,831,000 -2,909,000 864,000 -272,000 -6,359,000 7,000 28,778,000 558,000 23,252,000 1,593,000 -12,584,000 -5,443,000 833,487,000 
          effect of exchange rate changes on cash and cash equivalents
        -5,414,000 1,071,000 516,000 11,493,000 11,082,000 -8,710,000 3,309,000 -1,993,000 -793,000 3,418,000 1,131,000 9,816,000 -7,266,000 -5,776,000 2,928,000 2,507,000 -314,000 280,000 
          net increase in cash, cash equivalents, and restricted cash
        -64,885,000 -236,856,000  -150,127,000 -44,394,000 135,703,000  -28,174,000 64,925,000 13,826,000  103,515,000       
          cash, cash equivalents, and restricted cash as of the beginning of the period
        714,630,000 518,706,000 462,731,000 429,721,000 1,000 -1,000 38,069,000 
          cash, cash equivalents, and restricted cash as of the end of the period
        -64,885,000 477,774,000 254,742,000 -150,127,000 -44,394,000 654,409,000 5,398,000 -28,174,000 64,925,000 476,557,000 46,635,000 103,515,000 -39,387,000 351,968,000 -332,323,000 39,356,000 43,273,000 679,415,000 
          supplemental cash flows information
                          
          interest paid
        1,565,000 6,236,000  5,806,000 1,150,000 920,000 844,000 1,080,000 376,000 722,000 1,381,000 444,000 237,000 274,000   503,000 
          cash paid on income taxes
        6,970,000 3,664,000                 
          capital expenditures on software
         -3,521,000 -4,892,000 -3,725,000 -3,221,000 -3,077,000 -2,254,000 -3,588,000 -3,890,000 -1,128,000 -1,951,000        
          net income
                          
          adjustments to reconcile net income to net cash from operating activities:
                          
          current accruals and provisions
                -12,406,000 -455,000 71,354,000 -2,517,000 -54,801,000 -20,907,000 20,655,000 -90,259,000 14,216,000 23,027,000 
          proceeds from maturities of short-term investments
                  70,071,000 40,425,000 1,178,000     
          payments for purchase of investment in joint venture
                  -5,013,000     
          proceeds from borrowing against note receivable - pledged as collateral
                  27,034,000 21,142,000     
          payments of debt issuance costs
                          
          payments for acquisitions
              -3,892,000         
          net increase in cash and cash equivalents
                     -77,753,000 -332,324,000 39,357,000 43,273,000 641,346,000 
          cash (refund) paid on income taxes
                          
          payment for debt issuance costs on 2030 convertible senior notes
            -622,000 -10,000,000             
          payment for debt issuance costs on revolving facilities
            -785,000 -195,000             
          cash paid for income taxes
            5,290,000 5,707,000 942,000 410,000 393,000 916,000 312,000   284,000 770,000 684,000 605,000 9,000 
          insurance proceeds received
                         
          purchase of equity securities
                        
          purchases of short-term investments
                          
          payments for acquisition of businesses, net of cash acquired
                         
          repayment of promissory notes – related parties
                      -50,000,000 
          repayment of line of credit
                          
          payment of transaction costs related to issuance of class b membership units
                          
          proceeds from issuance of class a common stock sold in an ipo, net of underwriting discounts and commissions
                      12,229,000    
          payments of deferred equity issuance cost
                          
          supplemental disclosure of cash flow information
                          
          debt issuance costs
               -705,000           
          stock-based compensation expense
                6,636,000 5,630,000 5,480,000 5,677,000 7,286,000 8,477,000 17,771,000    
          deferred revenue and payables with related parties
                          
          provision on loss contracts
                 -524,000 2,449,000   -2,720,000 27,750,000   5,668,000 
          payables and deferred revenue with related parties
                 148,417,000 -38,252,000 -40,082,000 -164,302,000 51,716,000 72,915,000 56,759,000 -29,348,000 -21,904,000 
          repurchase of class a common stock placed into treasury
                  -1,166,000 -1,330,000 -288,000 -22,000    
          payment of debt issuance costs
                 -3,583,000      177,000 -578,000 -2,719,000 
          inventory (recovery) provision
                          
          capital contribution from founders
                          
          proceeds from issuance of class b membership units
                          
          borrowing from promissory notes – related parties
                          
          borrowing from line of credit
                          
          payment of equity issuance costs
                          
          other
                          
          payment of transaction cost related to issuance of class b membership units
                          
          payments of deferred equity issuance costs
                          
          benefit on loss contracts
                          
          net cash from (used) in investing activities
                          
          payment of ipo costs
                        -4,865,000 -5,465,000 
          purchase of short-term investments
                          
          cash settled for stock based compensation
                       14,434,000   
          capital contributions from founders
                          
          repayment to line of credit
                       -50,000,000 
          stock based compensation expense
                        2,728,000 24,877,000 
          cash paid for business acquisition
                          
          proceeds from issuance of class a common stock sold in the ipo, net of underwriting discounts
                        947,991,000 
          payment of transaction cost related to issuance of membership units
                        -6,320,000 
          supplemental cash flows information:
                          
          non-cash financing activities
                          
          reclassification of deferred offering costs to additional paid-in capital
                         6,764,000 
          ipo costs included in accounts payable
                         4,865,000