Tecogen Inc. (TGEN) | The Buildout — AI Infrastructure
The Verdict
Tecogen designs and builds natural-gas engine-driven combined heat and power systems and chillers for commercial and industrial customers. Its data-center pitch is a dual-power-source chiller that pairs an electric drive with a gas engine, capping grid draw during peaks and providing cooling through an outage, plus modular power units that can shed load. It matters to the AI buildout only indirectly: Tecogen does not sell compute, and its equipment addresses the power, water, noise and emissions constraints around data centers rather than the computing itself.
| Market Cap | — |
| Revenue (TTM) | $31M |
| Revenue Growth | +17.5% |
| EBITDA Margin (TTM) | -34.3% |
| Net Cash | $4M |
| Earnings Beats | 2 of 5 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Twelve data-center product demonstrations over two months — six in person, six virtual — whose attendees collectively represent more than 8 GW of operating data-center capacity and multiple gigawatts under construction.
- Base-business backlog greater than $8M, with a further $2M-$3M of projects management expects to close over the next few months, and Q3 2026 product revenue guided higher.
- Product-segment gross margin rose to 48.5% in Q2 FY2026 from 29.3%, on price increases instituted in 2026 and a change in product mix.
- Services — the largest revenue segment — grew 10% year over year in Q2 FY2026, helped by higher billable activity and Aegis-acquired contracts.
- Vertiv approved purchasing 1 MW of cooling, to be installed permanently at one of its own power-constrained facilities as a showcase to prospective customers.
What We’re Watching
- No data-center order has been announced beyond Vertiv's 1 MW; management declined to update the Vertiv purchase order, the Master Partnership Agreement, or the previously referenced 25-50 MW spec-in on the Q2 call.
- The Services margin recovery is promised, not delivered: about $300K of one-time costs held Q2 margin flat, with the full benefit of mid-quarter cost cuts guided for Q3 2026.
- Cash is a first-order constraint — $6.8M of cash at June 30, 2026 — against an inventory build ahead of orders and a build-to-order model that requires buying components long before payment.
- Sole-source rare-earth components from a supplier in China feed the engine-driven power inverter systems on the dual-power growth product, with no second source or timeline disclosed.
The thesis is unproven, but the leading indicators keep expanding. Data-center engagement has escalated from a pipeline in the hundreds of chillers to 12 completed demonstrations, and the same power scarcity that drives the pitch is lifting the legacy base business. Against that, the reported business remains small and loss-making, no data-center order has been named, and management has deliberately gone quiet on Vertiv and on data-center timing. The key open question is whether a named, marquee order lands before cash and larger, integrated competitors close the window.
Earnings
Tecogen reported second-quarter FY2026 revenue of $12.1M at a 39.4% gross margin, with an EBITDA loss of $4.0M. The quarter's standout was the data-center program: management said it hosted 12 product demonstrations — six in person, six virtual — whose attendees collectively represent more than 8 GW of operating data-center capacity. Management also flagged roughly $300K of one-time service-site costs, which it said held service gross margin about 7 percentage points lower.
| Metric | Q2 FY2026 | Q1 FY2026 | Q2 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $12M | $6M | $7M | +65.8% |
| Gross margin | 39.4% | 40.9% | 33.8% | +560bps |
| EBITDA | −$4M | −$2M | −$1M | +233.3% |
| EPS | $-0.14 | $-0.07 | $-0.06 | +142.6% |
| Base-business backlog | >$8M | $8.2M | $9.5M | Backlog was $9.5M at 3/31/25; firm-PO share was 95.5% then versus 24.9% at 3/31/26 |
we feel confident enough to begin building some inventory of our dual power source chiller and Tecogen modules to get a head start— Abinand Rangesh, CEO, 2026-08-13
Management tone: Management's tone shifted between the two calls. In the Q1 2026 call it described an imminent Vertiv purchase order and a surge in projects. By the Q2 2026 call the CEO opened by naming the question of why orders have taken so long and asked investors to choose between two conclusions, while declining to update the Vertiv order, the Master Partnership Agreement or the 25-50 MW spec-in. The company restated its Q3 2026 service cost-reduction timing and cited continued management and board buying.
Management Guidance
Management guided product revenue to increase in Q3 2026, based on the recent increase in backlog and projects expected to close in the next few months. It said it expects a further $2M-$3M of projects to close over the next few months and to collect more deposits, improving cash flow. It restated that the full impact of mid-quarter service cost reductions would be seen beginning in Q3 2026, and that one-time costs in Q2 reduced service margin by around 7 percentage points. The company issues no formal quantitative annual guidance.
Trajectory
On the audited spine the trajectory is revenue growth alongside persistently negative earnings. Trailing-twelve-month revenue is $30.9M, up 17.5% year over year, while TTM EBITDA is -$10.6M (a -34.3% margin), TTM net income is -$12.5M and TTM free cash flow is -$11.8M. The latest quarter posted $12.1M of revenue at a 39.4% gross margin and an EBITDA loss of $4.0M. Underneath, the mix is shifting: the Services segment is the largest revenue source and grew 10% year over year in Q2, the Products segment's gross margin rose to 48.5% on 2026 price increases and mix, and Energy Production remains small and volatile.
The Model
The model projects FY+1 revenue of $26.08M with EBITDA of -$6M (-21.1%), and FY+2 revenue of $34.1M with EBITDA of -$3M (-7.8%). FY+1 revenue of $26.08M sits below the $30.9M trailing-twelve-month figure. Near term, the projection rests on the base-business backlog, expected project closings, and the guided Q3 product-revenue increase. The FY+2 step-up depends on demonstrations and the Vertiv relationship converting into data-center orders and on the promised Services margin recovery. EBITDA stays negative in both years on the model's numbers.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $27M | $26M | $34M |
| YoY Growth | — | −3.8% | +30.8% |
| EBITDA | −$6M | −$6M | −$3M |
| EBITDA Margin | -23.2% | -21.1% | -7.8% |
Projections are the median of 5 independent model runs. The model’s revenue sits 47.4% below analyst consensus.
Management guided product revenue to increase in Q3 2026, based on the recent increase in backlog and projects expected to close in the next few months. It said it expects a further $2M-$3M of projects to close over the next few months and to collect more deposits, improving cash flow. It restated that the full impact of mid-quarter service cost reductions would be seen beginning in Q3 2026, and that one-time costs in Q2 reduced service margin by around 7 percentage points. The company issues no formal quantitative annual guidance.
What Could Go Right — and Wrong
- At least one named hyperscale or big-brand data-center pilot converts, turning the 12 demonstrations into a referenceable order.
- The Vertiv Master Partnership Agreement is signed and disclosed, and the previously referenced 25-50 MW of Vertiv-specced projects moves forward.
- Expected project closings land and the base-business backlog converts into revenue and collected deposits.
- Services gross margin recovers in Q3 2026 as guided, lifting the largest segment's profitability.
- Inventory pre-built ahead of orders ships quickly, compressing lead time for data-center customers.
- Demonstrations do not convert and no data-center order is named, decoupling the growth narrative from the financials while spending continues.
- Continued silence on Vertiv and the data-center pipeline erodes the only named relationship and the largest open question.
- The inventory build absorbs cash faster than deposits arrive, against a business that buys key components long before it is paid.
- The promised Q3 2026 Services margin recovery slips, leaving the largest segment under pressure.
- A disruption in the sole-source China rare-earth inverter components hits the dual-power product before it ramps.
Looking Ahead
Over the next 12 months the story turns on a handful of dated tests: Q3 FY2026 product revenue, Q3 services gross margin, and the expected project closings over the next few months. Against those, management has withheld timing on the Vertiv Master Partnership Agreement and on any data-center order, saying it is holding the approval process for something more substantial and prefers marquee names over speed. That preference implies the possibility of extended silence before any data-center revenue appears.
- Q3 2026Q3 product revenue — Tests management's guidance for higher product revenue from backlog
- Q3 2026Services margin recovery — Full impact of mid-Q2 service cost cuts, guided for Q3
- Next few monthsAdditional project closings — $2M-$3M of projects expected to close and convert to deposits
- Late 2026 to early 2027Inventory conversion — Pre-built dual-power chillers shipping on a data-center order
- No date givenVertiv MPA — Signed partnership agreement; management says to stay tuned
- No date givenFirst data-center order — Named hyperscale or big-brand pilot; priority is brand names
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $23M | $27M | $31M | +19.9% |
| Gross Margin | 43.7% | 36.3% | 37.2% | 735bps |
| EBITDA | −$4M | −$6M | −$11M | -61.5% |
| EBITDA Margin | -17.3% | -23.2% | -34.3% | 599bps |
| Net Income | −$5M | −$8M | −$12M | -76.6% |
| Free Cash Flow | $3M | −$10M | −$12M | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)37.2%
- EBITDA Margin (TTM)-34.3%
- Net Margin (TTM)-40.5%
- ROIC-67.3%
- SBC / Revenue0.6%
The Company
Tecogen designs and builds commercial and industrial, natural-gas-fueled, engine-driven combined heat and power products. The FY2025 10-K says these 'reduce energy costs, decrease greenhouse gas emissions and alleviate congestion on the national power grid.' The product line includes InVerde e+ and TecoPower cogeneration units that supply electricity and hot water; Tecochill air-conditioning and refrigeration chillers; the Tecochill hybrid-drive air-cooled chiller; Tecofrost gas engine-driven refrigeration compressors; and Ultera emissions control technology.
The company reports in three segments: Products, Services and Energy Production. The 10-K says the majority of customers are in regions with the highest utility rates, typically California, the Midwest and the Northeast. Headquarters and manufacturing sit in North Billerica, Massachusetts, in about 26,412 square feet of manufacturing, storage and office space. Service centers are in Piscataway, New Jersey; Valley Stream and Buchanan, New York; and Hayward, California, with parts depots in Easton, Massachusetts; Sterling Heights, Michigan; East Windsor, Connecticut; and Wellesley Chapel, Florida.
Business Segments
Competitive Landscape
The 10-K's competitive disclosure is narrow, stating that the company believes Capstone Turbine Corporation is the only microturbine manufacturer with a commercial presence in CHP — a CHP-niche statement, not a data-center cooling one. The source material describes a data-center power and cooling field where larger players are assembling integrated power-plus-cooling offerings, and where Tecogen's stated differentiators — closed-loop water savings, low noise, low emissions, dual-power redundancy — are being pursued in the same direction by bigger competitors.
- Capstone Turbine Corporation10-K: 'We believe that Capstone Turbine Corporation is the only microturbine manufacturer with a commercial presence in CHP.'
- Named as a partner and customer for a 1 MW cooling order; the wiring file also lists Vertiv as a competitor in data center cooling solutions, an ambiguity the source flags.
- Named only in generated wiring as a chiller competitor; not discussed in filings.
- Named only in generated wiring relationships; not discussed in filings.
- Named only in generated wiring relationships; not discussed in filings.
Supply Chain
Tecogen sits at the assembly end of the data-center cooling and power chain: it buys components from contract manufacturers and a limited supplier base and integrates them at its Massachusetts plant. No neighbor transcript names Tecogen; the only verified counterparty, Vertiv, did not mention it in its own quarter.
More on TGEN: Earnings recap