Accounts Receivable

12 Months Ended

Dec. 31, 2022

Receivables [Abstract]

Accounts Receivable

Accounts Receivable

Accounts receivable consists of the following (in thousands):

	December 31,
	2022		2021
Accounts receivable	$	423,071	$	236,149
Less: allowance for credit losses	(1,888)		(140)
Accounts receivable, net	$	421,183	$	236,009

Included in accounts receivable are amounts retained by project owners that represent funds withheld by our customers until the products are installed by a third-party, arranged by the customer, and the project is declared operational. Such retention amounts were $47.4 million and $13.5 million as of December 31, 2022 and 2021, respectively. All retention amounts outstanding as of December 31, 2022 are collectible within the next 12 months.

The following is the activity of the reserve for credit losses on accounts receivable which includes trade accounts receivable and unbilled accounts receivable (in thousands):

	December 31,
	2022		2021
Beginning balance	$	(140)	$	(663)
Provision for credit losses	(2,599)		303
Collected	731		130
Written-off	120		90
Ending balance	$	(1,888)	$	(140)