Battery Storage Projects in Idaho
Every operating battery storage project in Idaho on EIA-860M for 2026-07: 10 plants, 12 storage units and 659 MW of nameplate capacity across 6 counties.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Plants
- 10
- 12 generating units
- Nameplate capacity
- 659 MW
- Counties
- 6
- Grid operator
- Mixed
- no single ISO covers a majority
Map of battery storage projects in Idaho
Every one of the 10 plants is drawn at the coordinate EIA files for it.
Loading map…
- Battery · 10
List of battery storage projects in Idaho
Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.
| Hemmingway BESSBatteries | Idaho Power Co | Owyhee | 166 | 3 | 2025 | Operating |
| Kuna BESSBatteries | Kuna BESS, LLC | Ada | 150 | 1 | 2025 | Operating |
| Boise Bench BESSBatteries | Idaho Power Co | Ada | 150 | 1 | 2026 | Operating |
| Happy Valley Battery StorageBatteries | Idaho Power Co | Canyon | 82 | 1 | 2025 | Operating |
| Franklin Battery StorageBatteries | Idaho Power Co | Twin Falls | 60 | 1 | 2025 | Operating |
| Black Mesa BESSBatteries | Idaho Power Co | Elmore | 40 | 1 | 2024 | Operating |
| Elmore BESSBatteries | Idaho Power Co | Elmore | 4 | 1 | 2025 | Operating |
| Weiser BESSBatteries | Idaho Power Co | Washington | 3 | 1 | 2025 | Operating |
| Filer BESSBatteries | Idaho Power Co | Twin Falls | 2 | 1 | 2025 | Operating |
| Melba BESSBatteries | Idaho Power Co | Canyon | 2 | 1 | 2025 | Operating |
Largest battery storage projects in Idaho
- 1Hemmingway BESSOwyhee County, Idaho166 MW
- 2Kuna BESSAda County, Idaho150 MW
- 3Boise Bench BESSAda County, Idaho150 MW
- 4Happy Valley Battery StorageCanyon County, Idaho82 MW
- 5Franklin Battery StorageTwin Falls County, Idaho60 MW
- 6Black Mesa BESSElmore County, Idaho40 MW
- 7Elmore BESSElmore County, Idaho4 MW
- 8Weiser BESSWashington County, Idaho3 MW
- 9Filer BESSTwin Falls County, Idaho2 MW
- 10Melba BESSCanyon County, Idaho2 MW
Battery storage projects by county in Idaho
The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.
| County | Plants | Nameplate MW |
|---|---|---|
| Ada | 2 | 300 |
| Owyhee | 1 | 166 |
| Canyon | 2 | 84 |
| Twin Falls | 2 | 62 |
| Elmore | 2 | 44 |
| Washington | 1 | 3 |
Battery Storage Projects in Idaho: FAQ
- How many battery storage projects are in Idaho?
- 10, with 659 MW of nameplate capacity between them, spread over 6 counties. That is the EIA-860M operating count for 2026-07.
- Is there a map of Idaho battery storage projects?
- Yes — the map above. Each dot is one battery storage project, sized by nameplate capacity and placed at the coordinates EIA files for it.
- Which is the largest battery storage project in Idaho?
- Hemmingway BESS, at 166 MW. The table is sorted largest first, so the rest follow it.
- Is there a battery storage project near me in Idaho?
- The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
- Which grid operator runs Idaho's battery storage projects?
- No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Idaho is largely a vertically integrated utility rather than an organised market.
- How current is this, and what is left out?
- EIA-860M for 2026-07. EIA technology "Batteries" — grid-connected electrochemical storage of 1 MW and above. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.