Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2023

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


	Estimated Useful Life (in Years)	September 30, 2023		December 31, 2022
Energy systems	1 - 15 years	$	2,810,232	$	2,810,232
Machinery and equipment	5 - 7 years	1,758,601		1,624,885
Furniture and fixtures	5 years	206,865		196,007
Computer software	3 - 5 years	192,865		192,865
Leasehold improvements	*	466,789		466,789
		5,435,352		5,290,778
Less - accumulated depreciation and amortization		(4,180,696)		(3,883,058)
		$	1,254,656	$	1,407,720

* Lesser of estimated useful life of asset or lease term