Wisconsin solar calculator
Size a Wisconsin home solar system from your electric bill — kW, panel count, roof area, true cost with no federal credit for 2026 installs, and payback.
Quick answer: At $0.191/kWh and 4.2 peak sun hours, a $200/month bill needs about 10.66 kW — 26 × 410 W panels covering ~52 m². Gross cost is ~$32,513 with no federal credit for systems installed after 2025, offsetting $2,400 a year for a ~13.5 year payback.
Your details
Ballpark, not gospel. Ballpark, not gospel. Sized at 78% real-world output with the Wisconsin sun-hour average — confirm shading, roof angle and your utility's export tariff with a local installer before buying. MGE and Xcel credit exports near retail, but We Energies, WPS and Alliant pay only 3.6–4.3¢/kWh for month-end surplus. The calculator values all generation at your retail rate; exports earn far less, so real savings track self-consumption and batteries.
The 30% credit ended — what changed
The residential clean energy credit (26 U.S.C. § 25D) gave homeowners a 30% credit on solar installed from 2022 through 2025. The July 2025 tax law ended it: no credit is available for property placed in service after December 31, 2025. That is why every figure on this page is ~30% higher than pre-2026 guides show. If your system went live by the end of 2025, tick the box above to see the credit applied; leased systems may still benefit because the leasing company claims the commercial credit. Source: IRS — Residential Clean Energy Credit.
Typical Wisconsin system sizes by monthly bill
| Monthly bill | System size | Panels (410 W) | Net cost (no 2026 federal credit) | Payback |
|---|---|---|---|---|
| $100 | 5.33 kW | 13 | $16,256 | 13.5 years |
| $200 | 10.66 kW | 26 | $32,513 | 13.5 years |
| $300 | 15.99 kW | 39 | $48,770 | 13.5 years |
Computed at $0.191/kWh, 4.2 peak sun hours and $3.05/W installed, with no federal credit for 2026 installs. Run your exact bill above.
Solar in Wisconsin: the details
Solar cost in Wisconsin
Solar installation costs in Wisconsin run high. The EnergySage marketplace averaged about $3.05 per watt installed in 2026, with market quotes typically landing $2.59–$3.50/W — the upper end of the $2.50–$3.50/W national band. A typical ~10.7 kW Wisconsin system grosses around $32,500 before any incentives, with no federal credit for 2026 homeowner installs.
What moves the number: roof complexity, panel tier, and installer competition. Get at least three quotes — spreads of $0.50/W between installers are common.
Export rules: getting paid for surplus power
Wisconsin has no single net-metering rule — your utility's tariff is the whole ballgame. Madison Gas and Electric and Xcel credit exports near retail (about 18.4¢/kWh at MGE), while month-end surplus earns only 3.636¢/kWh at We Energies, 3.584¢/kWh at WPS and 4.254¢/kWh at Alliant.
Leases and PPAs sit in a legal gray zone in Wisconsin, so most buyers finance with cash or loans. Practical takeaway: check your utility's export tariff before anything else — it decides whether solar pays back at all, and high self-use is non-negotiable for We Energies/WPS/Alliant customers.
Wisconsin solar incentives
Wisconsin's one real incentive is time-boxed: Focus on Energy pays $600/kW up to $2,400 for purchased systems switched on by December 31, 2026 (apply by January 31, 2027) — miss the deadline and it is gone. Solar equipment is also exempt from sales tax and property tax.
Beyond that there is nothing statewide, which is why the utility tariff does the real work.
Is solar worth it in Wisconsin?
Verdict: it depends on your utility. The calculator puts a $200/month bill at a ~13.5-year payback at the retail rate — but that number is only real for MGE and Xcel customers whose exports earn near retail. For We Energies, WPS and Alliant customers, month-end surplus earns 3.6–4.3¢/kWh, and the true payback needs high self-use to land within panel life. The Focus on Energy rebate ($600/kW up to $2,400, deadline December 31, 2026) can move the needle if you act now.
Questions people actually ask
Straight answers, no fluff. Then run your own numbers above.
How many solar panels do I need in Wisconsin?
It follows your bill. At the Wisconsin average of $0.191/kWh and 4.2 peak sun hours, a $200/month bill needs about a 10.66 kW system — roughly 26 × 410 W panels covering ~52 m² of roof.
What is the average cost of solar panels in Wisconsin in 2026?
Solar installation costs in Wisconsin run high. The EnergySage marketplace averaged about $3.05 per watt installed in 2026, with market quotes typically landing $2.59–$3.50/W — the upper end of the $2.50–$3.50/W national band. A typical ~10.7 kW Wisconsin system grosses around $32,500 before any incentives, with no federal credit for 2026 homeowner installs.
Does Wisconsin have net metering?
No single statewide rule — your utility's tariff decides. MGE and Xcel credit exports near retail (~18.4¢/kWh at MGE), but We Energies (3.636¢), WPS (3.584¢) and Alliant (4.254¢) pay wholesale-ish rates for month-end surplus. Check your utility before you buy.
Does Wisconsin offer any solar tax credit or rebate?
Focus on Energy pays $600/kW up to $2,400 for purchased systems switched on by December 31, 2026 (apply by January 31, 2027); solar equipment is also exempt from sales tax and property tax.
Is the 30% federal solar tax credit still available?
Not for homeowner purchases anymore. The residential clean energy credit (26 U.S.C. § 25D) is not available for property placed in service after December 31, 2025, under the July 2025 tax law (Public Law 119-21). Systems installed by the end of 2025 can still claim 30%, and leased systems may still benefit because the leasing company claims the commercial credit instead. (Source: IRS — Residential Clean Energy Credit.)
Is solar worth it in Wisconsin?
Verdict: it depends on your utility. The calculator puts a $200/month bill at a ~13.5-year payback at the retail rate — but that number is only real for MGE and Xcel customers whose exports earn near retail. For We Energies, WPS and Alliant customers, month-end surplus earns 3.6–4.3¢/kWh, and the true payback needs high self-use to land within panel life. The Focus on Energy rebate ($600/kW up to $2,400, deadline December 31, 2026) can move the needle if you act now.
Figures last checked October 2026. Sources: EIA Electric Power Monthly, NREL PVWatts/NSRDB, DSIRE, Public Service Commission of Wisconsin; IRS — Residential Clean Energy Credit.
More US solar calculators
Compare other states: Texas, Florida, California, Arizona, North Carolina, South Dakota, Tennessee, Utah, Vermont, Virginia, Washington, West Virginia, Wyoming. And the national US solar calculator for country averages.
Comparing quotes? The solar cost calculator breaks down cost per watt and the solar ROI calculator maps your payback year by year. Going deeper: installation cost guide, how net metering works, how much you can save with solar and the solar batteries guide.