Regis Lyssy
Battery storage power plant · Karnes County, Texas
Nameplate capacity
9.9 MW
Rank in Texas
#808
of 1,071 plants
In service since
2026
February 2026
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Regis Lyssy LLC
- County
- Karnes County
- Generating units
- 1
- Share of state capacity
- 0.00%
- Rank among battery storage plants in Texas
- #185 of 211
- EIA plant code
- 69339
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| LYSSY | Batteries | 9.9 MW | 9.9 MW | 2026 | 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 Hidden Valley | Battery storage | 9.9 MW |
| Regis Laureles | Battery storage | 9.9 MW |
| Regis Mason | Battery storage | 9.9 MW |
| Regis Medina Lake | 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