Walnut Grove Demonstration Plant
Battery storage power plant · Leake County, Mississippi
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Mississippi Power Co
- County
- Leake County
- Generating units
- 2
- Share of state capacity
- 0.02%
- Rank among battery storage plants in Mississippi
- #1 of 1
- EIA plant code
- 65697
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1A | Batteries | 1.5 MW | 1.5 MW | 2023 | Operating |
| 1B | Solar Photovoltaic | 1.5 MW | 1.5 MW | 2023 | 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 Mississippi
| ERDC | Natural gas | 3.2 MW |
| SR Houston | Solar | 3.1 MW |
| District 70 Transco Gas Pipe Line | Other | 1.6 MW |
| Prairie Bluff | Other | 1.6 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 3.0 MW solar plant and a 3.0 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 Mississippi power plants · What Mississippi actually generates