South River BESS Phase 1
Middlesex County, New Jersey · EIA plant ID 70239 · Operator: South River OnSite Generation, LLC
Nameplate10MWSummer 10 MW
Generators1in service
Net generation—GWh12 mo
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online2025
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.
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 |
|---|---|---|---|---|---|---|---|---|
| SOUR1 | Batteries | BA | 9.9 | 9.9 | Jan 2025 | Operating | — | coming soon |
Owner / operator
Operator: South River OnSite Generation, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| South River OnSite Generation, LLC | 100.0% | 10 MW |
Nearby plants
Within 80 km.
| South River 2 | 10 MW | 0.1 km |
| Red Oak Power LLC | 821 MW | 2.5 km |
| Cinnamon Bay Edgeboro Landfill | 10 MW | 2.8 km |
| Sayreville Cogeneration Facility | 430 MW | 2.9 km |
| ILR Landfill | 7 MW | 3 km |
| Sayreville Solar Project | 3 MW | 3.6 km |