Solar Incentives in Wisconsin
Wisconsin homeowners who installed solar in 2026 have access to four active incentive programs. The state's Renewable Energy Sales Tax Exemption eliminates Wisconsin sales and use tax — the state rate is 5%, plus any applicable county or local tax — on qualifying solar equipment that produces at least 200 watts of alternating current or 600 Btu per day. A separate Property Tax Exemption ensures that the added value a qualifying solar energy system contributes to a home is fully excluded from local property tax assessments, administered through local assessors under Wisconsin Department of Revenue guidance. Through net metering, customers of investor-owned and participating municipal utilities are billed on the net difference between energy consumed and energy produced; compensation for excess generation is each utility's commission-approved buy-back rate, which varies by utility and is set by the Public Service Commission of Wisconsin. Focus on Energy, the statewide program funded by participating utilities, offers a rebate of up to $2,400 for qualifying residential solar PV systems purchased and installed between January 1 and June 30, 2026, with its own application requirements and deadlines.
On the federal side, the residential Clean Energy Credit under Internal Revenue Code §25D — commonly known as the 30% solar tax credit — expired for systems placed in service after December 31, 2025, under the One Big Beautiful Budget Act (Pub. L. 119-21). Homeowners whose systems are installed new in 2026 do not qualify for that credit. The absence of this previously significant incentive lengthens payback periods compared to prior years, making the remaining state-level programs relatively more important to the overall economics of a new installation.
Wisconsin's residential electricity rate averaged approximately 18.80 cents per kilowatt-hour as of March 2026, up about 1.05 cents from the prior year. At that rate, the value of solar generation offset against utility bills is meaningful, and the combination of the sales tax exemption, property tax exemption, net metering compensation, and the Focus on Energy rebate still reduces upfront and long-term costs, though payback timelines will vary by system size, utility, and household consumption.
Figures on this page are verified as of June 2026 against official sources; solar incentive programs change with each legislative session and utility rate case, and readers should consult the Wisconsin Department of Revenue, the Public Service Commission of Wisconsin, and Focus on Energy directly for current program terms.
Federal credit update. The federal residential Clean Energy Credit (the 30% “solar tax credit” under §25D) expired for systems placed in service after December 31, 2025. New 2026 residential installs do not qualify; a 2025 install can still be claimed on a 2025 return (IRS Form 5695). What this means for 2026 →
Current solar incentives in Wisconsin
Renewable Energy Sales Tax Exemption (Solar, Wind, Biogas)
Wisconsin exempts from state sales and use tax the sale, storage, use or consumption of a product whose power source is wind energy, direct radiant energy from the sun, or gas from anaerobic digestion of agricultural waste, provided the product produces at least 200 watts of alternating current or 600 Btu per day. The electricity or energy produced by such a product is also exempt. The exemption does not apply to an uninterruptible power source designed primarily for computers. A contractor who furnishes and installs a qualifying product that becomes real property is treated as the consumer and may claim the exemption with an exemption certificate.
| Amount | Full exemption from Wisconsin state sales/use tax (state rate 5%, plus applicable county/local) on qualifying equipment producing at least 200 W AC or 600 Btu/day, and on the energy it produces. |
|---|---|
| Who qualifies | Solar, wind, or qualifying biogas products meeting the 200 W AC / 600 Btu/day output threshold; statewide. Excludes computer-oriented uninterruptible power supplies. |
| Administered by | Wisconsin Department of Revenue |
Source: Wis. Stat. s. 77.54(56); Wis. Admin. Code Tax 11.10 Official source →
Property Tax Exemption for Solar, Wind, and Biogas Energy Systems
Wisconsin exempts from general property taxation biogas or synthetic-gas energy systems, solar energy systems, and wind energy systems. A solar energy system is defined as equipment that directly converts and then transfers or stores solar energy into usable thermal or electrical energy, excluding components that would also be present in a conventional energy system. Property owners claim the exemption by filing an energy system exemption request with the local assessor.
| Amount | 100% exemption of the value attributable to the qualifying solar, wind, or biogas energy system from local property tax assessment. |
|---|---|
| Who qualifies | Owners of qualifying solar, wind, or biogas/synthetic-gas energy systems statewide; biogas systems have a limited exclusion for property existing on Jan. 1, 2014 within a tax incremental district in effect on that date. |
| Administered by | Wisconsin Department of Revenue / local assessors |
Source: Wis. Stat. s. 70.111(18); DOR Form PR-303 Official source →
Net Metering (Customer-Owned Generation)
Net metering is available in Wisconsin to customers of investor-owned utilities and municipal utilities who install customer-owned generation such as rooftop solar. Under net metering a customer is billed on the difference between the energy consumed and the energy produced during a billing period, and utilities offer parallel-generation (buy-back) rates for excess electricity delivered to the grid. Wisconsin has no single statewide net-metering rate; the terms, eligible system size, and buy-back compensation are set in each utility's commission-approved tariff, so the offering varies by utility (many investor-owned tariffs historically apply to systems up to about 20 kW).
| Amount | Compensation for excess generation is the utility's commission-approved parallel-generation/buy-back rate and varies by utility; not a single statewide figure. |
|---|---|
| Who qualifies | Customers of Wisconsin investor-owned and municipal electric utilities installing customer-owned generation; eligible system size and rate set by each utility's tariff approved by the PSC. |
| Administered by | Public Service Commission of Wisconsin (regulates utility tariffs) |
Source: Wis. Admin. Code ch. PSC 113; utility parallel-generation tariffs (varies by utility) Official source →
Focus on Energy Solar PV Rebate (Solar for Homes)
Focus on Energy, Wisconsin's statewide energy-efficiency and renewable resource program funded by participating utilities, offers a rebate to residential customers who install a qualifying solar photovoltaic system. For the 2026 program year, systems purchased and installed between January 1, 2026 and June 30, 2026 are eligible, with applications due within 60 days of installation and no later than August 31, 2026. Funding is limited and awarded on a first-come, first-served basis.
| Amount | Up to $2,400 for a qualifying residential solar PV installation (2026 program year). |
|---|---|
| Who qualifies | Residential customers of participating Wisconsin utilities; system at least 0.5 kW DC, oriented within 135 degrees of due south with panel tilt 5-50 degrees, less than 15% shading, and using equipment from the program's Solar Electric Qualified Equipment List. |
| Administered by | Focus on Energy (statewide program of participating Wisconsin utilities) |
Source: program page (Focus on Energy Solar for Homes / 2026 Solar PV Rebate Application) Official source →
Compare solar incentives across all states → · Check what applies to you →
Programs verified as of June 2026 against official state and federal sources (each cited above); refreshed quarterly as legislatures and utility rate cases change the rules. How we verify this data. This page is informational only — not tax or legal advice.