Decorah Battery
Battery storage power plant · Winneshiek County, Iowa
Nameplate capacity
2.5 MW
Rank in Iowa
#245
of 305 plants
In service since
2021
June 2021
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Interstate Power and Light Co
- County
- Winneshiek County
- Generating units
- 1
- Share of state capacity
- 0.01%
- Rank among battery storage plants in Iowa
- #2 of 4
- EIA plant code
- 64375
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| BESS1 | Batteries | 2.5 MW | 2.5 MW | 2021 | 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 Iowa
| Waverly Community Wind Project | Wind | 2.7 MW |
| REG Mason City Solar | Solar | 2.6 MW |
| Douglas (IA) | Solar | 2.5 MW |
| Gowrie | Other | 2.5 MW |
About this data
From EIA’s inventory of operable generators, May 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 2.5 MW solar plant and a 2.5 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 Iowa power plants · What Iowa actually generates