Walnut Grove Demonstration Plant
Leake County, Mississippi · EIA plant ID 65697 · Operator: Mississippi Power Co
Nameplate3MWSummer 3 MW
Generators2in service
Net generation3GWh12 mo to Dec 2025
Capacity factor25%solar units, summer MW
Heat rate—thermal plants only
First online2023
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2023 | 1.3 | 19.9% | — |
| 2024 | 3.6 | 27.1% | — |
| 2025 | 3.3 | 24.9% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1A | Batteries | BA | 1.5 | 1.5 | Jul 2023 | Operating | — | coming soon |
| 1B | Solar Photovoltaic | PV | 1.5 | 1.5 | Jul 2023 | Operating | — | coming soon |
Owner / operator
Operator: Mississippi Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Mississippi Power Co | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| Pearl River Solar Park LLC | 175 MW | 26.1 km |
| Ragsdale Solar LLC | 100 MW | 52.2 km |
| Attala | 551 MW | 52.6 km |
| Ratcliffe | 840 MW | 65.3 km |
| Sylvarena | 141 MW | 66.6 km |
| Sweatt | 42 MW | 73.7 km |