Twelvemile Solar 2
Solar power plant · Mayes County, Oklahoma
Nameplate capacity
52 MW
Rank in Oklahoma
#115
of 147 plants
In service since
2026
March 2026
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Leeward Asset Management, LLC
- County
- Mayes County
- Generating units
- 1
- Share of state capacity
- 0.14%
- Rank among solar plants in Oklahoma
- #5 of 17
- EIA plant code
- 69538
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| TS2 | Solar Photovoltaic | 52 MW | 52 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 Oklahoma
| NextEra-Blackwell Wind, LLC | Wind | 60 MW |
| Stillwater Energy Center | Natural gas | 56 MW |
| Fort Gibson | Hydro | 45 MW |
| Woodward Energy Storage | Battery storage | 40 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 52 MW solar plant and a 52 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 Oklahoma power plants · What Oklahoma actually generates