Planned battery storage projects in Montana
What EIA-860M's Planned sheet says is coming in Montana: 2 battery storage projects totalling 450 MW, each with the in-service year its developer reported and the construction status EIA records. A planned project is not a built one.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Planned projects
- 2
- 3 generating units
- Proposed capacity
- 450 MW
- Earliest in-service year
- 2027
- Latest in-service year
- 2027
Map of planned battery storage projects in Montana
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List of planned battery storage projects in Montana
| Anthelope Hills Solar Generation BESS2 technologies | ARFL bn, LLC | Beaverhead | 400 | 2 | 2027 | Regulatory approvals pending. Not under construction |
| Beartooth Energy Storage LLCBatteries | Beartooth Energy Storage, LLC | Yellowstone | 50 | 1 | 2027 | Regulatory approvals pending. Not under construction |
Where they are in the build
- Regulatory approvals pending. Not under construction2
Planned battery storage projects in Montana: FAQ
- How many battery storage projects are planned in Montana?
- 2, for 450 MW of nameplate capacity. These are generators developers have reported to EIA, not generators that exist.
- What do the status letters mean?
- EIA files each planned generator under a status: regulatory approvals pending, under construction at or below half complete, under construction more than half complete, construction complete but not yet in commercial operation, or planned but not yet started. Each row shows its own.
- Do these projects always get built?
- No. EIA keeps a separate Canceled or Postponed sheet, and projects move between the sheets month to month. This page is the Planned sheet for 2026-07 and nothing more.