Battery storage projects in Idaho
10 operating battery storage projects in Idaho with 659 MW of battery capacity, largest first. From EIA-860M, August 2026.
Projects
10
Battery capacity
659 MW
Net generation, 2025
−40.2 GWh
9 of 10 projects reported
Largest battery storage projects in Idaho
| # | Plant | Battery MW | GWh, 2025 |
|---|---|---|---|
| 1 | Hemmingway BESSOwyhee County | 166 | −6.5* |
| 2 | Kuna BESSAda County | 150 | −13.9* |
| 3 | Boise Bench BESSAda County | 150 | – |
| 4 | Happy Valley Battery StorageCanyon County | 82 | −6.8* |
| 5 | Franklin Battery StorageTwin Falls County | 60 | −9.0 |
| 6 | Black Mesa BESSElmore County | 40 | −3.2* |
| 7 | Elmore BESSElmore County | 4.0 | −0.4 |
| 8 | Weiser BESSWashington County | 3.0 | −0.2 |
| 9 | Filer BESSTwin Falls County | 2.0 | −0.2 |
| 10 | Melba BESSCanyon County | 2.0 | −0.1 |
* Fewer than 12 months of 2025 reported, so the total is partial.
Every project with battery storage, solar and wind hybrids included. MW is battery nameplate only; net generation covers the whole project. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources