Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment, net

Property, Plant and Equipment, net

9 Months Ended

Sep. 30, 2022

Property, Plant and Equipment [Abstract]

Property, plant and equipment at September 30, 2022 and December 31, 2021 consisted of the following:


	Estimated Useful Life (in Years)	September 30, 2022		December 31, 2021
Energy systems	1 - 15 years	$	3,478,824	$	3,556,488
Machinery and equipment	5 - 7 years	1,596,827		1,463,153
Furniture and fixtures	5 years	196,006		193,698
Computer software	3 - 5 years	192,865		192,865
Leasehold improvements	*	466,789		466,789
		5,931,311		5,872,993
Less - accumulated depreciation and amortization		(4,269,617)		(4,090,049)
		$	1,661,694	$	1,782,944

* Lesser of estimated useful life of asset or lease term

Depreciation and amortization expense on property and equipment for the three and nine months ended September 30, 2022 and 2021 was $125,755 and $376,365, and $144,181 and $450,195, respectively. During the nine months ended September 30, 2022, we received proceeds of $72,655 from the disposition of certain assets, realizing a gain of $41,931 and disposed of machinery and equipment with a cost of $93,988 and no net book value.