Plug-In Solar in Wisconsin — Status: unclear
Is Plug-In Solar Legal in Wisconsin?
No dedicated statewide plug-in solar law is identified in our tracker for Wisconsin. That does not automatically permit or prohibit every configuration: grid-connected, zero-export, and electrically isolated off-grid systems can be treated differently. Before installing or connecting equipment, confirm current utility or interconnection rules, local code or permit requirements, property or lease conditions, outlet and electrical suitability, and the equipment listing and manufacturer instructions.
Last Updated: March 2026
Key Information
| Average Electricity Rate | 17.2¢/kWh |
| Estimated Annual Savings | $205/year |
| TOU Rate Spread | 5¢/kWh |
| Peak Sun Hours/Day | 4.3 |
| Retail Choice | none |
What You Can Do
No specific plug-in solar law. Wisconsin has strong net metering. We Energies and Xcel Energy offer solar programs.
What You Can't Do (Yet)
Utilities require interconnection agreements for grid-tied systems.
Available Rebates & Incentives
Focus on Energy offers solar rebates for Wisconsin homeowners (through We Energies and other participating utilities). Net metering available through We Energies and Xcel Energy. The federal 30% ITC (Section 25D) expired December 31, 2025.
Incentive Program Links
- Focus on Energy — Solar Rebates — Solar rebates for Wisconsin homeowners through participating utilities.
- DSIRE — Wisconsin Solar Incentives — Full list of Wisconsin state and utility solar incentive programs.
Demographics (US Census 2023)
| Population | 5,960,975 |
| Total Households | 2,479,480 |
| Owner-Occupied | 1,681,494 |
| Renter-Occupied | 797,986 |
| Single-Family Homes | 1,843,720 |
| Apartment Units (5+) | 480,883 |
| Median Household Income | $77,485 |
| Median Home Value | $266,500 |
Solar Resource Data (NREL PVWatts)
| Peak Sun Hours/Day | 4.5 |
| Optimal Tilt Angle | 20° |
| Optimal Azimuth | 180 |
| Est. Annual kWh (800W system) | 1063 kWh |
| Best Solar Months | July, May, June, August, April |
Major Utilities
| Utility | Customers | Net Metering |
|---|---|---|
| We Energies | ~1,100,000 electric customers | Yes |
| Northern States Power Company d/b/a Xcel Energy | ~265,000 electric customers | Yes |
| Madison Gas and Electric | ~167,000 electric customers | Yes |
| Wisconsin Public Service Corporation | ~474,000 electric customers | Yes |
Explore Your Next Steps in Wisconsin
Use these tools and guides alongside the state-specific rules above to evaluate your space, potential savings, and the right connection approach.
- Compare every state — Return to the national tracker to compare enacted laws, pending bills, and unclear jurisdictions.
- Check your WI setup readiness — Review placement, outlet, property, and state-rule questions before choosing equipment.
- Estimate savings in Wisconsin — Use your location and setup assumptions to estimate bill savings and storage value.
- Understand off-grid and grid-connected use — Separate truly off-grid or portable solar from equipment that connects to a building circuit or utility grid.