Beartooth Energy Storage LLCPlanned
Yellowstone County, Montana · EIA plant ID 65407 · Operator: beartooth energy storage, llc
50 MW planned (Batteries), first expected Dec 2027 · EIA-860M
Nameplate—MWSummer — MW
Generators0in service
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 |
|---|---|---|---|---|---|---|---|---|
| BEAR1 | Batteries | BA | 50 | 50 | planned Dec 2027 | Planned | — | coming soon |
Owner / operator
Operator: beartooth energy storage, 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.
| MTSUN | 80 MW | 12 km |
| Yellowstone County Generating Station | 207 MW | 14.2 km |
| Western Sugar Cooperative - Billings | 2 MW | 17.1 km |
| Phillips 66 Billings Refinery | 2 MW | 17.6 km |
| Yellowstone Energy LP | 68 MW | 22.7 km |
| Two Dot Wind Broadview East LLC | 2 MW | 36.1 km |