Property, plant and equipment (Tables)

12 Months Ended

Dec. 31, 2024

Property, plant and equipment at December 31, 2024 and 2023 consisted of the following:


	Estimated Useful Life (in Years)	2024		2023
Energy systems	10 - 15 years	$	2,810,232	$	2,810,232
Machinery and equipment	5 - 7 years	1,598,538		1,744,596
Furniture and fixtures	5 years	224,868		212,963
Computer software	3 - 5 years	192,865		192,865
Leasehold improvements	*	906,739		466,789
		5,733,242		5,427,445
Less - accumulated depreciation and amortization		(3,995,206)		(4,264,868)
Net property, plant and equipment		$	1,738,036	$	1,162,577

* Lesser of estimated useful life of asset or lease term