Elkhorn Battery Energy Storage System
Battery storage power plant · Monterey County, California
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Pacific Gas & Electric Co.
- County
- Monterey County
- Generating units
- 1
- Share of state capacity
- 0.17%
- Rank among battery storage plants in California
- #17 of 142
- EIA plant code
- 62564
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| ELKHO | Batteries | 183 MW | 183 MW | 2022 | Out of service but expected to return to service in next calendar year |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in California
| Blythe Solar IV, LLC | Solar | 184 MW |
| Redding Power | Natural gas | 183 MW |
| Dion R Holm | Hydro | 180 MW |
| El Segundo Cogen | Natural gas | 180 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 183 MW solar plant and a 183 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All California power plants · What California actually generates