Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2026

Accounting Policies [Abstract]

Schedule of Revenue from External Customers

Revenue from external customers (including, but not limited to homeowners) for each group of similar products and services is as follows (in thousands):

	Three Months Ended March 31,
	2026		2025
Customer agreements	$	447,102	$	381,360
Incentives	20,720		21,560
Customer agreements and incentives	467,822		402,920
Energy systems	212,215		40,068
Products	42,194		61,283
Energy systems and product sales	254,409		101,351
Total revenue	$	722,231	$	504,271

Schedule of Cash and Restricted Cash

The following table provides a reconciliation of cash and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows. Cash and restricted cash consists of the following (in thousands):

	Three Months Ended March 31,
	2026		2025
Beginning of period:
Cash	$	823,380	$	574,956
Restricted cash, current and long-term	413,608		372,460
Total	$	1,236,988	$	947,416
End of period:
Cash	$	679,552	$	604,874
Restricted cash, current and long-term	409,719		374,029
Total	$	1,089,271	$	978,903

Schedule of Cash and Restricted Cash

The following table provides a reconciliation of cash and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows. Cash and restricted cash consists of the following (in thousands):

	Three Months Ended March 31,
	2026		2025
Beginning of period:
Cash	$	823,380	$	574,956
Restricted cash, current and long-term	413,608		372,460
Total	$	1,236,988	$	947,416
End of period:
Cash	$	679,552	$	604,874
Restricted cash, current and long-term	409,719		374,029
Total	$	1,089,271	$	978,903

Schedule of Accounts Receivable, Net

Accounts receivable, net consists of the following (in thousands):

	March 31, 2026		December 31, 2025
Customer receivables	$	204,225	$	191,559
Third party system sales receivables	42,652		44,419
Grid services receivables	3,100		29,800
Other receivables	5,417		17,541
Allowance for credit losses	(22,886)		(20,692)
Total	$	232,508	$	262,627

Schedule of Deferred Revenue

Deferred revenue consists of the following (in thousands):

	March 31, 2026		December 31, 2025
Under Customer Agreements:
Payments received, net	$	1,047,600	$	1,047,929
Financing component balance	89,210		87,294
	1,136,810		1,135,223
Under SREC contracts:
Payments received, net	367,997		356,263
Financing component balance	25,579		21,847
	393,576		378,110
Total	$	1,530,386	$	1,513,333