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The agreement, described as the largest enhanced geothermal power purchase deal on record, includes an option for Google to expand its offtake to nearly 1 GW

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Fervo Energy signed a 396-megawatt power purchase agreement with Alphabet $GOOGL's Google on Tuesday, the largest enhanced geothermal power purchase agreement on record, to supply carbon-free electricity for a potential data center in Utah.

The deal covers output from Fervo's Cape Station enhanced geothermal systems project in southwestern Utah, which the company expects to come online in 2028. Under the agreement, Google also holds an option to expand its purchase by roughly 600 megawatts by June 2030, which would bring the total to nearly 1 gigawatt, the company said. Final data center plans remain subject to engineering feasibility reviews, state and local approvals, and commercial conditions.