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Solar Energy Systems, net | 12 Months Ended
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Dec. 31, 2022
Solar Energy Systems Disclosure [Abstract] |
Solar Energy Systems, net | Solar Energy Systems, net Solar energy systems, net consists of the following (in thousands):
|  | December 31,
|  | 2022 |  | 2021
Solar energy system equipment costs |  | $ | 10,529,852 |  |  | $ | 9,018,788 |
Inverters and batteries |  | 1,384,776 |  |  | 1,127,014 |
Total solar energy systems |  | 11,914,628 |  |  | 10,145,802 |
Less: accumulated depreciation and amortization |  | (1,682,296) |  |  | (1,267,932) |
Add: construction-in-progress |  | 756,029 |  |  | 581,826 |
Total solar energy systems, net |  | $ | 10,988,361 |  |  | $ | 9,459,696 |
All solar energy systems, including construction-in-progress, have been leased to or are subject to signed Customer Agreements with customers. The Company recorded depreciation expense related to solar energy systems of $426.7 million, $368.0 million and $225.9 million for the years ended December 31, 2022, 2021 and 2020, respectively. The depreciation expense was reduced by the amortization of deferred grants of $8.3 million, $8.3 million and $8.2 million for the years ended December 31, 2022, 2021 and 2020, respectively.

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