Wisconsin Power & Light Co
Investor Owned electric utility · Wisconsin · #78 of 3,199 U.S. utilities by customers · EIA utility #20856
Wisconsin Power & Light Co is a investor owned electric utility serving 505,706 customers in Wisconsin. In 2025 it sold 11,264 gigawatt-hours of electricity for $1.51B in revenue, an average realized rate of 13.41¢ per kWh across all customer classes and 18.47¢ per kWh for residential customers. Its reported service territory covers 35 counties. EIA records its activities as: generation, buying transmission, distribution, buying distribution, wholesale marketing, retail marketing, bundled.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 440,746 | 3,671 | $678.14M | 18.47¢ | |
| Commercial | 63,796 | 2,421 | $329.95M | 13.63¢ | |
| Industrial | 1,164 | 5,172 | $503.00M | 9.73¢ | |
| Total | 505,706 | 11,264 | $1.51B | 13.41¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (694 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 487,076 | 11,185 | $1.14B | 13.49¢ |
| 2022 | 492,811 | 11,169 | $1.28B | 15.18¢ |
| 2023 | 497,000 | 11,057 | $1.35B | 16.14¢ |
| 2024 | 501,644 | 10,974 | $1.35B | 16.89¢ |
| 2025 | 505,706 | 11,264 | $1.51B | 18.47¢ |
Reliability (2025)
Average outage time (SAIDI): 96 minutes per customer per year
Average outages (SAIFI): 0.79 per customer
Average restoration time (CAIDI): 122 minutes
As reported for Wisconsin under the Other standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 15,263 GWh
Wholesale power purchased: 2,893 GWh
Winter peak demand: 2,042 MW
Energy losses: 4.1% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.6% of 508,376 meters
Customer-sited generation (net metering): 6,150 installations, 47.4 MW of capacity
Counties served
Adams, WICalumet, WIColumbia, WICrawford, WIDane, WIDodge, WIFond Du Lac, WIGrant, WIGreen Lake, WIGreen, WIIowa, WIJackson, WIJefferson, WIJuneau, WIKenosha, WILafayette, WILanglade, WIManitowoc, WIMarathon, WIMarquette, WIMenominee, WIMonroe, WIOconto, WIPortage, WIRichland, WIRock, WISauk, WIShawano, WISheboygan, WIVernon, WIWalworth, WIWaupaca, WIWaushara, WIWinnebago, WIWood, WI
Other large utilities in Wisconsin
- Wisconsin Electric Power Co - 1,179,163 customers, residential 20.53¢
- Wisconsin Public Service Corp - 472,199 customers, residential 17.20¢
- Northern States Power Co - 273,992 customers, residential 15.55¢
- Madison Gas & Electric Co - 168,439 customers, residential 21.11¢
- Adams-Columbia Electric Coop - 39,826 customers, residential 18.98¢
- Polk-Burnett Electric Coop - 22,408 customers, residential 15.96¢
- Riverland Energy Cooperative - 20,219 customers, residential 16.19¢
- Barron Electric Coop - 19,794 customers, residential 16.02¢
All Wisconsin utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #20856 in the EIA frame.