Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment, net

Property, Plant and Equipment, net

6 Months Ended

Jun. 30, 2023

Property, Plant and Equipment [Abstract]

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

Depreciation and amortization expense on property and equipment for the three and six months ended June 30, 2023 and 2022 was $161,701 and $279,193 and $123,818 and $250,610, respectively. During the six months ended June 30, 2023, we received proceeds of $16,863 from the disposition of certain assets and reversed $8,687 of accrued decomissioning costs from a former ADG energy site, realizing a gain of $19,950. During the six months ended June 30, 2022, we received proceeds of $67,169 from the disposition of certain assets, realizing a gain of $36,445.