West Middleton BESS
Battery storage power plant · Dane County, Wisconsin
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Madison Gas & Electric Co
- County
- Dane County
- Generating units
- 1
- Share of state capacity
- 0.04%
- Rank among battery storage plants in Wisconsin
- #3 of 5
- EIA plant code
- 69313
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| WMB | Batteries | 7.0 MW | 7.0 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 Wisconsin
| High Falls (WI) | Hydro | 7.0 MW |
| Huiskamp BESS | Battery storage | 7.0 MW |
| Port Edwards Mill | Hydro | 6.7 MW |
| Elroy | Other | 6.6 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 7.0 MW solar plant and a 7.0 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 Wisconsin power plants · What Wisconsin actually generates