RE Tranquillity
Solar power plant · Fresno County, California
Nameplate capacity
277 MW
Rank in California
#86
of 1,897 plants
In service since
2016
July 2016
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Southern Power Co
- County
- Fresno County
- Generating units
- 3
- Share of state capacity
- 0.26%
- Rank among solar plants in California
- #28 of 937
- EIA plant code
- 59939
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| TQ | Solar Photovoltaic | 205 MW | 200 MW | 2016 | Operating |
| BESS1 | Batteries | 37 MW | 37 MW | 2021 | Operating |
| BESS2 | Batteries | 35 MW | 35 MW | 2022 | 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
| Mojave Solar Project | Solar | 280 MW |
| Solar Star 2 | Solar | 279 MW |
| Devil Canyon | Hydro | 276 MW |
| RE Garland | Solar | 273 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 277 MW solar plant and a 277 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