Enhanced Geothermal Is Now a Commercial Power Plant
Fervo Energy declared commercial operation at the first power plant of its Cape Station project in Beaver County, Utah, one day ahead of its contractual deadline. The plant synchronized to the grid on September 24 and now delivers 33 MW of net power, with future growth expected. The company describes it as the first greenfield enhanced geothermal development to reach contractual commercial operation, which means the industry now has a revenue-generating reference plant rather than a collection of pilots.
Enhanced geothermal systems do not depend on finding natural reservoirs of hot water, which exist in only a few places. Fervo instead drills horizontal wells with techniques adapted from oil and gas, and fractures hot dry rock to create an engineered reservoir, so the resource can be built where the rock is hot rather than found where water happens to flow. The output is firm, carbon-free power that runs around the clock, which complements intermittent wind and solar. The first unit took 23 months to build and commission, and Fervo says it expects future units to take 18 months.
The commercial commitments are specific. Southern California Edison signed 15-year agreements in 2024 for 320 MW from Cape Station. Google signed a 396 MW agreement that supports the project’s 400 MW expansion, with an option to grow its purchase to nearly 1 GW by June 2030. Fervo reports more than 1 GW of binding power purchase agreements overall. The remaining two 33 MW units of the first phase are due at year end, and the full 500 MW project is expected to be complete in 2028.
The caveats deserve equal attention. Geothermal supplied about 0.4% of US utility-scale electricity in 2025, so the US Department of Energy (DOE) projection that next-generation geothermal could provide 90 GW by 2050, requires steep growth from a small base. Canary Media reports Phase I capital costs near $7,000 per kilowatt, with a $5,500 target for the next phase. On October 6, short seller Morpheus Research published a report disputing Fervo’s reservoir performance data, water losses and cost trajectory, but Fervo has maintained that performance is consistent with its expectations. Practitioners evaluating firm-power procurement should treat this milestone as real, monitor for the timely completion of the next two units, and track the reported capital costs before assuming they will fall as projected.
Sustainable Aviation Fuel Reality Check with ICF’s Helen Giles: https://www.youtube.com/watch?v=vAvfZOU7Xtg
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