Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2023

Property, plant and equipment at June 30, 2023 and December 31, 2022 consisted of the following:


	Estimated Useful Life (in Years)	June 30, 2023		December 31, 2022
Energy systems	1 - 15 years	$	2,810,232	$	2,810,232
Machinery and equipment	5 - 7 years	1,766,945		1,624,885
Furniture and fixtures	5 years	198,170		196,007
Computer software	3 - 5 years	192,865		192,865
Leasehold improvements	*	466,789		466,789
		5,435,001		5,290,778
Less - accumulated depreciation and amortization		(4,082,683)		(3,883,058)
		$	1,352,318	$	1,407,720

* Lesser of estimated useful life of asset or lease term