SCE Just Signed a 320 MW Geothermal Deal for 24/7 Clean Power
Here's Why It Signals a Major Shift in How California Thinks About Energy

Southern California Edison recently announced a 320-megawatt geothermal power purchase agreement — one of the largest geothermal contracts in California history. The deal, which will draw on geothermal resources in the Salton Sea region of Southern California, is noteworthy not just for its scale but for what it signals about the direction of California's energy strategy. Geothermal power is fundamentally different from solar and wind: it generates electricity 24 hours a day, 7 days a week, regardless of weather or time of day. It's renewable, emissions-free, and — crucially — dispatchable. The utility can ramp it up or down as needed, like a gas plant but without the carbon. For California's clean energy transition, 24/7 clean power is the golden standard. And for homeowners watching the transition unfold, SCE's geothermal bet tells an important story about where California thinks the grid needs to go — and what that means for the value of residential solar-plus-storage.

The Problem Geothermal Is Solving

California has been spectacularly successful at deploying solar energy. The state generates enormous amounts of clean electricity during sunny afternoons — so much that grid-scale curtailment (wasting generated power because the grid can't absorb it) has become a regular occurrence.

The problem: the sun sets. California's evening demand peak — driven by returning workers, air conditioning, cooking, and laundry — arrives just as solar generation drops. Filling that evening gap with clean energy has been California's defining clean energy challenge. Solar can help — especially when paired with batteries that store afternoon generation for evening dispatch. But batteries have duration limits, and truly reliable 24/7 clean power requires generation sources that aren't dependent on the sun. Geothermal fills this role precisely. The Salton Sea region in Southern California sits above some of the most productive geothermal resources in North America — underground heat sources that enable continuous, low-cost clean power generation. SCE's 320 MW deal is a bet that geothermal can anchor California's clean firm power supply as solar and batteries handle the intermittent generation component.

What This Means for Grid Rates

The geothermal contract will add to SCE's contracted clean energy portfolio and, over time, contribute to reducing the utility's dependence on expensive natural gas peaking plants. That's a long-run rate benefit — but the transition cost (financing the geothermal development, integrating new generation into the grid, managing the transmission infrastructure to move power from the Salton Sea to load centers) flows through rates before the full cost savings materialize. For the near-to-medium term, large clean energy contracts like the geothermal deal are part of the portfolio of investments that the CPUC is incorporating into rate cases — which means they're contributing to the sustained upward rate pressure California homeowners are experiencing. The broader point: California's energy transition is real, necessary, and happening at significant scale. But the costs of that transition are being socialized across the ratepayer base in ways that will continue driving rates upward for the next decade or more — regardless of how much cheaper renewable energy becomes at the generation level.

The Parallel for Residential Homeowners

The logic behind SCE's geothermal deal — commit to clean, reliable power now to reduce future exposure to volatile fossil fuel markets — maps directly onto the logic behind residential solar-plus-battery. A homeowner who installs solar panels and a battery system is committing to a known, fixed (or modestly escalating) energy cost for 20–25 years. They're reducing their future exposure to utility rates that are being driven up by the same kind of large infrastructure investments SCE is making in geothermal, battery storage, and transmission. SCE is buying 24/7 geothermal power to serve the grid. You can generate 70–80% of your household power with solar and serve your evening demand with batteries — creating your own version of the clean, reliable power supply that SCE is paying hundreds of millions of dollars to secure at scale. The scale is different. The logic is identical.

The Salton Sea Context

The Salton Sea geothermal region has significance beyond electricity generation. The area is home to substantial lithium deposits in the brines produced by geothermal operations — so-called "lithium valley." California has identified domestic lithium production as a strategic priority for the battery supply chain that underpins both grid-scale and residential storage.

If the Salton Sea region develops as both a geothermal power source and a lithium production hub, it could simultaneously support the clean firm power California needs and the battery supply chain that residential solar installations depend on. This convergence — clean power and battery materials from the same Southern California resource zone — represents exactly the kind of industrial synergy California's energy future requires.

What Qualifying Homeowners Should Know

For California homeowners considering solar, SCE's geothermal deal is context, not a reason to wait. The transition is underway. The rate implications of large infrastructure investments are landing now. And the window for accessing current TPO program terms, federal tax credits, and favorable net billing structures won't remain open indefinitely.

My Home & Solar Solutions helps qualifying Ventura County and Southern California homeowners access solar-plus-battery programs that reflect the same strategic logic as SCE's long-term clean energy contracts: commit to known, favorable energy costs now, and benefit from that commitment as utility rates continue their upward trajectory.

Visit https://myhomesolution.org/southern-california-edison-net-billing to learn more. SCE is making long-term bets on clean energy. Your home can make one too.