El Cajon Energy Storage
Battery storage power plant · San Diego County, California
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- San Diego Gas & Electric Co
- County
- San Diego County
- Generating units
- 1
- Share of state capacity
- 0.01%
- Rank among battery storage plants in California
- #102 of 142
- EIA plant code
- 60569
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| SES | Batteries | 7.5 MW | 7.5 MW | 2017 | Operating |
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
| Inskip | Hydro | 7.6 MW |
| Coram Energy LLC (ECT) | Wind | 7.5 MW |
| Plant No 1 Orange County | Other | 7.5 MW |
| Sierra Pacific Sonora | Other | 7.5 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 7.5 MW solar plant and a 7.5 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