In-State Geothermal Could Save California $44B Annually: CATF

Why It Matters

The potential cost and infrastructure savings could make California’s 100% clean‑energy target financially viable, while accelerating the adoption of baseload geothermal power.

Key Takeaways

• Next‑gen geothermal could cut CA electricity costs by $44 B annually
• Savings represent up to 52% reduction versus no‑geothermal scenario
• Deployment could lower transmission expansion needs by 28‑53%
• 30 GW EGS keeps solar build‑out at 3 GW/year
• Upfront drilling costs range $5‑$20 million per well

Pulse Analysis

California’s ambitious goal of delivering 100% carbon‑free electricity by 2045 hinges on affordable, reliable baseload power. Next‑generation geothermal—encompassing enhanced geothermal systems (EGS), closed‑loop, and hybrid designs—offers a way to tap the state’s abundant subsurface heat beyond the limited sites suitable for conventional geothermal. By creating engineered reservoirs and fluid pathways, these technologies can be sited in regions where land‑use constraints or lack of natural hydrothermal resources previously barred development, expanding the geographic footprint of clean firm generation.

The economic upside is striking. The Clean Air Task Force model projects up to $44 billion in annual electricity cost savings, a 52% reduction compared with a scenario lacking next‑gen geothermal. This translates into a 28‑53% drop in required interregional transmission upgrades, easing a major bottleneck for renewable integration. Moreover, adding 30 GW of EGS would allow California to maintain its current solar deployment rate of roughly 3 GW per year, avoiding the three‑fold increase that would otherwise be needed to meet demand. However, the capital intensity of drilling—costs ranging from $5 million to $20 million per well—creates a financing gap that could slow rollout without targeted risk mitigation.

Policy makers and utilities can bridge that gap by treating early subsurface data acquisition as a public good, similar to the DOE’s Frontier Observatory effort in Utah that spurred private‑sector projects like Fervo Energy’s Cape Station. State‑level incentives, loan guarantees, or joint‑venture structures could absorb initial exploration risk, encouraging developers to pursue larger EGS portfolios. As California continues to lead the nation in conventional geothermal capacity, unlocking the full potential of next‑generation geothermal could be the keystone for a cost‑effective, resilient, and fully decarbonized power grid.