Sun Prairie Utilities and solar
Sun Prairie Utilities is a municipal utility serving about 17,082 homes in Wisconsin. Here's what its rates and export rules mean for solar: for a typical customer, solar is not worth it.
- Average price (2026 est.)
- 12.6¢33% below Wisconsin average
- Typical bill
- $77611 kWh a month
- Exports credited
- ~32%Varies by utility
- Typical payback
- 19.8 yrs3.6 kW, cash
Export rules for Sun Prairie Utilities customers
Varies by utility (Wisconsin rule).
Wisconsin has no statewide net metering law; each utility's PSC-approved tariff applies. Most offer monthly netting for systems up to ~20 kW (We Energies up to 300 kW), but some pay only avoided cost for monthly excess.
Solar for a typical Sun Prairie Utilities home
| System | 3.6 kW (65% of 611 kWh/month) |
|---|---|
| Cost | $14,300, $12,140 after incentives |
| First-year savings | $599 |
| Payback | 19.8 years |
| 25-year net | $3,981 |
Uses the utility's average price.
Solar adoption
- Homes with solar (2025)
- 333
- Share of customers
- 1.9%
- Residential solar capacity
- 3 MW
- Residential customers
- 17,082
EIA-861, 2025.
Questions about Sun Prairie Utilities and solar
Does Sun Prairie Utilities have net metering?
Sun Prairie Utilities follows Wisconsin's rules: Wisconsin has no statewide net metering law; each utility's PSC-approved tariff applies. Most offer monthly netting for systems up to ~20 kW (We Energies up to 300 kW), but some pay only avoided cost for monthly excess.
How much does electricity cost with Sun Prairie Utilities?
Residential customers paid an average of 12.1¢ per kWh in 2025 (EIA), about 12.6¢ adjusted to 2026. The typical home uses 611 kWh a month, a bill of about $77.
Is solar worth it with Sun Prairie Utilities?
For a typical customer, solar is not worth it: a 3.6 kW system costing about $12,140 pays back in about 19.8 years, with $3,981 net over 25 years.
How many Sun Prairie Utilities customers have solar?
About 333 homes had net-metered solar at the end of 2025, roughly 1.9% of residential customers (EIA-861).
Legal name: Sun Prairie Utilities (EIA ID 18312). Data: EIA-861 2025 and monthly data through 2026, state policy research October 2026.