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REVENUE
 12 Months Ended
Dec. 31, 2022
Revenue from Contract with Customer [Abstract]  
REVENUE REVENUE
Disaggregation of Revenue
The following table provides information on the disaggregation of revenue as recorded in the consolidated statements of operations (in thousands):
Year ended December 31,
202220212020
Hardware revenue$310,837 $106,908 $20,662 
Services and other revenue52,143 20,463 15,645 
Total revenue
$362,980 $127,371 $36,307 
Within services and other revenue, the Company recorded revenue from project assets of $3.9 million for the year ended December 31, 2022. Partnership hardware and service revenue was $280.4 million, $107.1 million, and $20.7 million for the years ended December 31, 2022, 2021, and 2020, respectively.
The following table summarizes reportable revenue by geographic regions determined based on the location of the customers (in thousands):
Year ended December 31,
202220212020
United States$353,792 $127,230 $36,181 
Rest of the world9,188 141 126 
Total revenue$362,980 $127,371 $36,307 

Remaining Performance Obligations
Remaining performance obligations represent contracted revenue that has not been recognized, which includes contract liabilities (deferred revenue) and amounts that will be billed and recognized as revenue in future periods. As of December 31, 2022, the Company had $534.9 million of remaining performance obligations, and the approximate percentages expected to be recognized as revenue in the future are as follows (in thousands, except percentages):
Total remaining
performance
obligations		Percent Expected to be Recognized as Revenue
Less than
one year		Two to
five years		Greater than
five years

Services and other revenue
$322,645 17 %48 %35 %
Hardware revenue
212,270 100 %— %— %
Total revenue$534,915 
Contract Balances
Deferred revenue primarily includes cash received in advance of revenue recognition related to energy optimization services and incentives. The following table presents the changes in the deferred revenue balance during the years ended December 31, 2022, 2021, and 2020 (in thousands):
202220212020
Balance as of beginning of period$37,443 $52,410$20,728
Deferred revenue acquired upon business combination49,626 ——
Upfront payments received from customers206,868 89,95140,481
Upfront or annual incentive payments received5,797 6,614 8,015 
Revenue recognized related to amounts that were included in beginning balance of deferred revenue(22,669)(33,585)(9,764)
Revenue recognized related to amounts that were included in acquired balance of deferred revenue(3,338)— — 
Revenue recognized related to deferred revenue generated during the period(135,653)(77,947)(7,050)
Balance as of end of period$138,074 $37,443 $52,410