Fervo's First 33MW Unit Makes Cape Station the First Utility-Scale Enhanced Geothermal Plant

The Technical Details

The first unit synchronized to the grid on September 24 and began commercial operation six days later. Fervo plans two more 33MW blocks by January 1, 2027. The remaining 400MW, backed by a new agreement with Google, is under construction for 2028.

Fervo has run a 3.5MW pilot, Project Red, in Nevada since late 2023. It has not disclosed terms of its power purchase agreements (PPAs), which cover about 1,000MW of current and future projects.

• First unit: 33MW, grid sync September 24, 2026
• Next phase: two more 33MW blocks by January 1, 2027
• Final phase: 400MW, backed by Google, online 2028
• Total project: 500MW, about $2 billion
• Phase 1 cost: $7,000 per kW; Phase 2 cost: $5,500 per kW
• Comparison: average US gas plant build cost $2,157 per kW in 2025
• PPA pipeline: about 1,000MW (terms undisclosed)
• Geothermal share of US generation: 0.4%

Voltgrid Analysis: Infrastructure Implications

For AI data centers, the value is firm, carbon-free capacity that does not depend on weather. Google's backing of the 400MW phase shows hyperscalers will pay for that profile even at a cost premium.

The premium is large. At $7,000 per kW, Phase 1 costs more than three times the 2025 average for a new gas plant. Phase 2 at $5,500 per kW narrows that gap, and the learning curve will decide whether enhanced geothermal moves beyond niche deals.

Fervo's Dawn Owens points to two other options: flexible output timed to the evening solar drop, and behind-the-meter supply wired straight to data centers. The second would keep new capacity costs off utility customers' bills and sidestep the interconnection queue.

Looking Ahead

The next checkpoint is whether Fervo brings two more 33MW blocks online by January 1, 2027. The 400MW Google-backed phase in 2028 will show whether costs keep falling at scale.

Source: IEEE Spectrum, Canary Media.