Regis Mason
Battery storage power plant · Mason County, Texas
Nameplate capacity
9.9 MW
Rank in Texas
#809
of 1,071 plants
In service since
2024
June 2024
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Regis Mason LLC
- County
- Mason County
- Generating units
- 1
- Share of state capacity
- 0.00%
- Rank among battery storage plants in Texas
- #186 of 211
- EIA plant code
- 69345
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| MASON | Batteries | 9.9 MW | 9.9 MW | 2024 | 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
| Regis Laureles | Battery storage | 9.9 MW |
| Regis Lyssy | Battery storage | 9.9 MW |
| Regis Medina Lake | Battery storage | 9.9 MW |
| Regis Milton | Battery storage | 9.9 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 9.9 MW solar plant and a 9.9 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