Wisconsin Solar Incentives & Rebates Guide 2026

The federal Investment Tax Credit (ITC) allows Wisconsin homeowners to deduct 30% of the total cost of a solar energy system from their federal income taxes. For a typical 6kW system costing $17,220 in Wisconsin, that's a direct tax credit of $5,166. This isn't a deduction — it's a dollar-for-dollar reduction of your tax bill.

The 30% ITC is available through 2032 under the Inflation Reduction Act, then steps down to 26% in 2033 and 22% in 2034. There's no maximum cap on the residential credit. If your tax liability is less than the credit amount, you can roll the remaining credit forward to the next tax year. The system must be installed on your primary or secondary residence, and you must own it (leased systems don't qualify for the homeowner credit).

Wisconsin does not currently offer a state-level solar tax credit. However, Wisconsin homeowners still benefit from the substantial 30% federal ITC, worth $5,166 on a typical 6kW system. Additionally, Focus on Energy: $600/kW up to $2,400. Even without a state credit, solar is economically attractive in Wisconsin with electricity rates averaging 18.16¢/kWh — well above the national average.

Great news for Wisconsin homeowners: Solar energy systems are exempt from property tax assessments. 100% property tax exemption Studies show solar adds 3-4% to home values. For a $300,000 home, that's roughly $12,000 in added value — and with Wisconsin's property tax exemption, you save approximately $132 per year in property taxes you'd otherwise owe on that increased value.

Wisconsin exempts solar energy equipment from state sales tax. On a 6kW system costing $17,220, this saves you approximately $1,119 at the point of purchase. This is an immediate, upfront savings that reduces your out-of-pocket cost before even accounting for tax credits.

Net metering policy: Full Retail Rate. Net metering at retail rate for systems up to 20 kW The current system size cap is 20 kW.

Wisconsin's full retail rate net metering is one of the strongest solar policies available. Every excess kWh your system sends to the grid earns you a credit at the full retail rate of 18.16¢/kWh. This means your solar panels generate maximum value — surplus energy produced during sunny hours offsets your evening and nighttime consumption at the same rate you'd pay to buy that electricity.

Focus on Energy: $600/kW up to $2,400

Utility rebates and state programs can change frequently. We recommend checking with your local utility and the Database of State Incentives for Renewables & Efficiency (DSIRE) for the most current programs available in your area.

Wisconsin has a mandatory Renewable Portfolio Standard (RPS) target of 10% by 2015 (met). This legally binding target drives continued investment in renewable energy infrastructure and often supports solar-friendly policies like net metering and SREC programs. A strong RPS is generally good news for solar homeowners, as it creates market demand for renewable energy and helps maintain favorable solar policies.