Mount Signal Solar Farm V
Solar power plant · Imperial County, California
Nameplate capacity
252 MW
Rank in California
#97
of 1,897 plants
In service since
2018
November 2018
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Imperial Valley Solar 3, LLC
- County
- Imperial County
- Generating units
- 1
- Share of state capacity
- 0.23%
- Rank among solar plants in California
- #34 of 937
- EIA plant code
- 61202
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| MTSG3 | Solar Photovoltaic | 252 MW | 252 MW | 2018 | 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
| AV Solar Ranch One | Solar | 253 MW |
| Collierville Powerhouse | Hydro | 253 MW |
| Long Beach Generation | Natural gas | 252 MW |
| Blythe Solar III, LLC Hybrid | Solar | 252 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 252 MW solar plant and a 252 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