West Middleton BESS
Dane County, Wisconsin · EIA plant ID 69313 · Operator: Madison Gas & Electric Co
Nameplate7MWSummer 7 MW
Generators1in service
Net generation—GWh12 mo
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online2026
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| WMB | Batteries | BA | 7 | 7 | Apr 2026 | Operating | — | coming soon |
Owner / operator
Operator: Madison Gas & Electric Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Madison Gas & Electric Co | 100.0% | 7 MW |
Nearby plants
Within 80 km.
| Middleton Biogas Solar, LLC | 2 MW | 3.8 km |
| Middleton Airport Solar | 6 MW | 4 km |
| GL Dairy Biogas | retired | 4 km |
| Pine Hill Solar | — | 6.7 km |
| Epic Verona | 46 MW | 10.7 km |
| West Campus Cogeneration Facility | 169 MW | 11.9 km |