Rosamond South 1
Solar power plant · Kern County, California
Nameplate capacity
257 MW
Rank in California
#94
of 1,897 plants
In service since
2025
August 2025
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Golden Fields Solar IV, LLC
- County
- Kern County
- Generating units
- 2
- Share of state capacity
- 0.24%
- Rank among solar plants in California
- #32 of 937
- EIA plant code
- 67764
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| RS1 | Solar Photovoltaic | 140 MW | 140 MW | 2025 | Operating |
| RBESS | Batteries | 117 MW | 117 MW | 2025 | 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
| Chaparral Springs | Solar | 262 MW |
| Edwards Sanborn E2 | Solar | 258 MW |
| AV Solar Ranch One | Solar | 253 MW |
| Collierville Powerhouse | Hydro | 253 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 257 MW solar plant and a 257 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