Martinsville BESS
Henry County, Virginia · EIA plant ID 69727 · Operator: AEP Onsite Partners
Nameplate10MWSummer 10 MW
Generators1in service
Net generation1GWh12 mo to Dec 2025
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online2022
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), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
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) |
|---|---|---|---|
| 2025 | 0.9 | — | — |
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 |
|---|---|---|---|---|---|---|---|---|
| MBSS | Batteries | BA | 10.1 | 10.1 | Apr 2022 | Operating | — | coming soon |
Owner / operator
Operator: AEP Onsite Partners. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| AEP Onsite Partners | 100.0% | 10 MW |
Nearby plants
Within 80 km.
| Martinsville | 1 MW | 2.6 km |
| Martinsville LFG Generator | 1 MW | 4.3 km |
| Shifting Sands Solar, LLC | 19 MW | 7.9 km |
| Sunny Rock Solar, LLC | 20 MW | 8.5 km |
| Caden Energix Axton LLC | 66 MW | 10.6 km |
| Green Acres (VA) | 5 MW | 12.7 km |