Gateway Energy Storage System
Battery storage power plant · San Diego County, California
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Gateway Energy Storage, LLC
- County
- San Diego County
- Generating units
- 1
- Share of state capacity
- 0.23%
- Rank among battery storage plants in California
- #8 of 142
- EIA plant code
- 63834
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GTWAY | Batteries | 250 MW | 250 MW | 2020 | 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
| Aquamarine | Solar | 250 MW |
| Athos Solar Project | Solar | 250 MW |
| Genesis Solar Energy Project | Solar | 250 MW |
| Victory Pass | Solar | 250 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 250 MW solar plant and a 250 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