Castle Gap Solar Hybrid
Solar power plant · Upton County, Texas
Nameplate capacity
190 MW
Rank in Texas
#358
of 1,071 plants
In service since
2018
May 2018
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Upton County Solar 2 LLC
- County
- Upton County
- Generating units
- 2
- Share of state capacity
- 0.09%
- Rank among solar plants in Texas
- #89 of 238
- EIA plant code
- 60123
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| CGAP | Solar Photovoltaic | 180 MW | 180 MW | 2018 | Operating |
| BAT1 | Batteries | 9.9 MW | 9.9 MW | 2019 | 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 Texas
| Plant X | Natural gas | 190 MW |
| Cunningham Storage | Battery storage | 190 MW |
| Notrees Windpower Hybrid | Wind | 189 MW |
| Baffin Wind | Wind | 188 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 190 MW solar plant and a 190 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 Texas power plants · What Texas actually generates