Milltown Onsite BESSUnder construction
Middlesex County, New Jersey · EIA plant ID 70296 · Operator: Milltown Onsite Generation, LLC
13 MW under construction (Batteries), first expected Oct 2026 · EIA-860M
Nameplate—MWSummer — MW
Generators0in service · 13 MW building
Net generation—GWh12 mo
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online—
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 |
|---|---|---|---|---|---|---|---|---|
| MTBAT | Batteries | BA | 13.2 | 13.2 | planned Oct 2026 | Under construction | — | coming soon |
Owner / operator
Operator: Milltown Onsite Generation, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Nearby plants
Within 80 km.
| Bristol Myers Squibb New Brunswick | 11 MW | 2.7 km |
| Rutgers Cook Douglass Lot 97 & 98a | 1 MW | 2.9 km |
| Cinnamon Bay Edgeboro Landfill | 10 MW | 3.7 km |
| ILR Landfill | 7 MW | 4.8 km |
| South River 2 | 10 MW | 4.9 km |
| South River BESS Phase 1 | 10 MW | 4.9 km |