Tecogen Inc. TGEN

What this company does

Tecogen Inc., a Delaware corporation (together with its subsidiaries "we", "our", "us", "Tecogen," or "Company") produces commercial and industrial, natural-gas-fueled engine-driven, combined heat and power (CHP) products that reduce energy costs, decrease greenhouse gas emissions and alleviate congestion on the national power grid. Our business operations are comprised of three business segments: •Products Segment - designs, manufactures and sells industrial and commercial cogeneration and chiller systems; •Services Segment - provides operations and maintenance ("O&M") services for our products under long term service contracts; and •Energy Production Segment - installs, operates and maintains distributed generation electricity systems that we own, and sells the energy generated by such systems in the form of electricity, heat, hot water and cooling to our customers under long-term energy sales agreements. We have shipped over 3,200 units, some of which have been operating for almost 35 years. On April 30, 2025, we announced that our common stock had been approved for listing on the NYSE American LLC ("NYSE American") stock exchange. Our Tecochill line of chillers are the only gas-engine-driven chillers available on the market. As of December 31, 2025, we employed 119 full-time employees and 1 part-time employee, including 4 sales and marketing personnel, 83 service personnel, 24 manufacturing personnel and 9 finance and administrative personnel.

Written from the business description in Tecogen Inc.'s annual report to the U.S. Securities and Exchange Commission, filed 19 March 2026. Every sentence was checked against that document before publication.