Solar panels in Wisconsin
Roofs across Wisconsin get about 1,492 hours of usable sunlight a year, and electricity costs 17.3¢/kWh. That combination puts a typical system's payback at 9.3 years. Here's the detail, from real rooftop data across 13 Wisconsin cities.
Check your own roof in Wisconsin → These are regional figures; your roof's size, pitch and shading move them a lot.
How Wisconsin compares
Wisconsin gets more sunlight than 48% of the cities we measure, and its electricity costs more than 58% of states and provinces. Both matter, but not equally: the electricity rate usually matters more, because solar saves money by replacing power you would otherwise buy. A sunny state with cheap power often pays back slower than a cloudy state with expensive power. Why that happens →
Solar by city in Wisconsin
| City | Sun hrs/yr | Panels | Net cost | Payback |
|---|---|---|---|---|
| Kenosha | 1,543 | 21 | $16,758 | 8.9 yrs |
| Appleton | 1,527 | 21 | $16,758 | 8.9 yrs |
| Madison | 1,524 | 21 | $16,758 | 9 yrs |
| La Crosse | 1,522 | 21 | $16,758 | 9 yrs |
| Oshkosh | 1,517 | 21 | $16,758 | 9 yrs |
| Milwaukee | 1,499 | 22 | $17,556 | 9.3 yrs |
| Eau Claire | 1,492 | 22 | $17,556 | 9.3 yrs |
| Waukesha | 1,458 | 22 | $17,556 | 9.4 yrs |
| Green Bay | 1,444 | 22 | $17,556 | 9.4 yrs |
| Racine | 1,421 | 23 | $18,354 | 9.8 yrs |
| Sheboygan | 1,388 | 23 | $18,354 | 9.8 yrs |
| Wausau | 1,365 | 24 | $19,152 | 10.2 yrs |
| Rhinelander | 1,321 | 25 | $19,950 | 10.6 yrs |
What a system costs in Wisconsin
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 4,058 | $6,384 | $702 | 9.1 yrs |
| 12 panels | 4.8 kW | 6,087 | $9,576 | $1,053 | 9.1 yrs |
| 16 panels | 6.4 kW | 8,116 | $12,768 | $1,404 | 9.1 yrs |
| 20 panels | 8 kW | 10,146 | $15,960 | $1,755 | 9.1 yrs |
| 26 panels | 10.4 kW | 13,189 | $20,748 | $1,972 | 10.5 yrs |
Payback stops improving as systems grow, then gets worse. You can only save on electricity you were going to buy, so once a system covers your usage the extra panels mostly export at a lower rate.
Wisconsin solar incentives
Every US household can claim the 30% federal residential clean energy credit, which is what the "after credit" figures above assume. On a $25,080 system that is $7,524 back. How the credit works →
State, utility and municipal incentives stack on top and change often — Wisconsin may offer rebates, property or sales tax exemptions, or performance payments. We deliberately don't list specific state programmes here because they change several times a year and stale numbers are worse than none. The DSIRE database is the standard reference and is kept current.
Wisconsin solar questions
Is solar worth it in Wisconsin?
At 17.3¢/kWh and 1,492 usable sun hours, a typical Wisconsin system pays back in about 9.3 years and returns roughly $29,543 across a 25-year panel life. That is a solid return, and rising electricity prices only improve it. Individual cities in Wisconsin vary widely around this average.
How many solar panels do I need in Wisconsin?
About 22 panels for a home using 10,800 kWh a year. Each 400W panel produces roughly 507 kWh annually at Wisconsin sunlight levels. Your own figure depends on actual usage — pull a year of bills rather than assuming average consumption, since heating and EV charging change it a lot.
How much do solar panels cost in Wisconsin?
A 8.8 kW system runs about $25,080 before incentives and $17,556 after the 30% federal credit, or roughly $2.85 per watt installed. Quotes vary widely by installer, roof complexity and whether your electrical panel needs upgrading — get three before deciding.
Worth reading before you buy
Regional estimates generated 2026-08-22 from Google Solar API rooftop samples across 13 Wisconsin cities, and average Wisconsin electricity rates. Not a quote and not financial or tax advice.