TECOGEN INC/WALTHAM MA Business Summary

Tecogen Inc. (TGEN) operates a diversified clean energy business model focused on three primary revenue segments: Products, Services, and Energy Production. The Products segment generates revenue through the sale of proprietary, ultra-clean combined heat and power (CHP) systems, high-efficiency water heaters, and its hybrid-drive air-cooled chillers specifically engineered for the data center cooling market. The Services segment provides high-margin, recurring revenue via long-term maintenance contracts across a national footprint, while the Energy Production segment sells electricity, heat, and cooling directly to customers under long-term power purchase agreements. Tecogen distinguishes itself in the sub-1MW distributed generation market through its patented Ultera emissions control technology, which meets the world's most stringent air quality standards. Its primary direct competitors include Mainspring Energy, 2G Energy AG, Capstone Green Energy, and Clarke Energy; Tecogen maintains a unique market position by offering a hybrid-drive solution that allows data centers to switch between natural gas and electric power to optimize for grid constraints and operational costs. The company’s leadership is anchored by a pedigree of high-tech thermal engineering, having been co-founded by brothers George and John Hatsopoulos, the former of whom also founded Thermo Electron (now Thermo Fisher Scientific). As of February 2026, the executive team is led by Chief Executive Officer Dr. Abinand Rangesh, a Cambridge-educated engineer who previously served as the company's CFO and has been instrumental in pivoting the firm toward the high-growth data center infrastructure sector. He is supported by President and Chief Operations Officer Robert A. Panora, a 40-year veteran of the company who led the development of the core InVerde and TECOCHILL platforms, and Chief Financial Officer Roger Deschenes, who brings over 30 years of experience from firms like L3 Harris Technologies. The board is chaired by Angelina M. Galiteva, a prominent renewable energy policy expert, with co-founder John N. Hatsopoulos continuing to serve as Lead Director, providing strategic continuity and deep industry ties.