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ENERGY STORAGE SYSTEMS, NET - Schedule of Energy Storage Systems, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Less: accumulated depreciation	$ (60,586)	$ (58,782)
Total energy storage systems, net	87,750	90,757
Energy storage systems placed into service
Property, Plant and Equipment [Line Items]
Total energy storage systems, gross	141,975	143,154
Energy storage systems not yet placed into service
Property, Plant and Equipment [Line Items]
Total energy storage systems, gross	$ 6,361	$ 6,385

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