Tecogen Inc
Tecogen designs, manufactures, markets, and services natural-gas-fueled combined heat and power systems, chillers, heat pumps, and related distributed energy equipment. The company serves commercial, institutional, industrial, and multi-family customers in the United States through direct sales, distributors, and long-term service and energy contracts.
Fiscal year 2025 · change from previous year
Development 2020–2025
Business
Share of revenueCHP systems, chillers, heat pumps, and engineered accessories sold to end users.
Operations, maintenance, and support services for installed Tecogen equipment.
On-site electricity, heat, hot water, and cooling sold under long-term contracts.
Products
Reported · share of revenue- Services61.4 %
- Products33.7 %
- Energy Service4.9 %
Source: 10-K FY2025, revenue the company reports per product line (SEC XBRL). Shares are of the lines shown and add up to 100 %.
Customers
Tecogen sells to customers that need on-site energy, heating, cooling, or resiliency, including hospitals, universities, hotels, multi-unit residential buildings, and industrial facilities. Its installed base also supports recurring service relationships and energy sales to sites that prefer long-term, below-utility-cost energy supply.
Hospitals, universities, municipal buildings, and military sites buy CHP and cooling systems for reliability and energy savings.
Hotels, office and retail buildings, and multi-unit residential properties buy systems to reduce utility costs and improve resiliency.
Food and beverage processors, factories, laundries, and indoor growing facilities buy equipment for thermal loads and on-site power.
Sites under long-term energy agreements buy electricity, heat, hot water, and cooling from Tecogen-owned systems.
Strategy
Tecogen’s strategy centers on selling high-efficiency on-site energy systems that lower customer utility costs while improving resiliency and emissions performance. It also uses long-term service and energy contracts to deepen customer relationships and create recurring revenue around its installed base.
Data centers and industrial users need fast on-site capacity and lower grid dependence.
Customers facing decarbonization pressure may prefer systems with lower criteria pollutants and GHG intensity.
Service contracts and energy production contracts can stabilize revenue around installed equipment.
Geography
Tecogen is a U.S.-based business, and the disclosed customer and regulatory exposure is primarily domestic. The company’s sales and installed base are concentrated in U.S. markets, with particular sensitivity to local building-energy rules and utility constraints in major metropolitan areas.
Risks
Tecogen is exposed to demand swings in project-based equipment sales, regulatory shifts affecting fossil-fuel-based building systems, and execution risk in a capital-intensive, customized manufacturing model. It also faces supply-chain and component availability risk, internal control risk, and financing dependence given its history of losses and related-party funding.
- Project and demand volatilityImpact: HighLikelihood: High
Equipment sales are high-dollar and low-volume, so order timing can materially change quarterly results.
Exposure: Products segment
- Supply-chain and component availabilityImpact: HighLikelihood: High
Engines and other critical parts can be delayed, affecting production schedules and margins.
Exposure: Manufacturing and installation
- Liquidity and financing dependenceImpact: HighLikelihood: High
The company has relied on external financing and related-party support to fund operations.
Exposure: Corporate funding
- Internal control deficienciesImpact: HighLikelihood: High
Material weaknesses can impair timely and accurate reporting and reduce investor confidence.
Exposure: Financial reporting
- Anti-fossil-fuel regulation and sentimentImpact: High
CHP systems use natural gas, so building electrification policies can limit adoption in some cities.
Exposure: New York City and similar urban markets
Accounting
Judgemental itemsProducts, services, and energy sales are recognized differently and can shift reported mix.
Impact: Affects quarterly revenue timing and gross margin comparability
Custom equipment orders can take significant time to build and deliver.
Impact: Affects visibility into near-term revenue
Funding from insiders and note conversions can change debt, equity, and interest expense.
Impact: Affects capital structure and financing disclosures
Owned and operated energy sites may involve lease-like arrangements and long-term obligations.
Impact: Affects liabilities, depreciation, and operating costs
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Last updated: 24/09/2026