Boise Bench BESS
Battery storage power plant · Ada County, Idaho
Nameplate capacity
150 MW
Rank in Idaho
#13
of 156 plants
In service since
2026
June 2026
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Idaho Power Co
- County
- Ada County
- Generating units
- 1
- Share of state capacity
- 2.21%
- Rank among battery storage plants in Idaho
- #2 of 10
- EIA plant code
- 68799
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| BOBS | Batteries | 150 MW | 150 MW | 2026 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Idaho
| Hemmingway BESS | Battery storage | 166 MW |
| Cedar Creek Wind, LLC | Wind | 160 MW |
| Kuna BESS | Battery storage | 150 MW |
| Pleasant Valley Solar 2 Project | Solar | 125 MW |
About this data
From EIA’s inventory of operable generators, August 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 150 MW solar plant and a 150 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Idaho power plants · What Idaho actually generates