Licensed Solar Contractor in Wisconsin: How to Verify Before You Hire

Wisconsin's solar adoption has grown steadily, supported by Focus on Energy rebates, net metering policies, and federal incentives. The state has a clear licensing framework for solar work that involves two separate regulated trades. Before you hire a solar contractor in Wisconsin, here is what you need to verify and where to check each credential.

Does Wisconsin require a license for solar installation?

Yes. Solar panel installation in Wisconsin requires two separate credentials from the Department of Safety and Professional Services (DSPS): an Electrical Contractor license for all wiring, inverter connections, and grid interconnection, and a Dwelling Contractor Certification (or Dwelling Contractor Qualifier certification) for roof-mounted installations that involve structural penetration or modification of a residential dwelling. Both are required for a complete residential solar installation.

The DSPS Dwelling Contractor Certification is required to pull residential building permits in Wisconsin. Any solar installation that requires a building permit — which includes all roof-mounted systems — needs a licensed Dwelling Contractor to apply for and manage the permit. The Electrical Contractor license is separate and covers the wiring and interconnection work. A solar company that holds both licenses can handle the full installation.

How do you verify a Wisconsin solar contractor's licenses?

Search Wisconsin DSPS licenses at dsps.wi.gov using the "Credential Search" tool at dsps.wi.gov/credentialSearch. You can search by business name, individual name, or credential number. Search for both the Electrical Contractor credential and the Dwelling Contractor credential for the company or the individuals performing the work. Both should show as active with a current expiration date.

If the solar company subcontracts electrical work, get the name and license number of the electrical contractor and verify it independently at dsps.wi.gov/credentialSearch. A solar company that cannot provide a Wisconsin Electrical Contractor license number for the person doing the wiring is not in compliance with Wisconsin electrical code requirements.

What is the Focus on Energy program and how does it affect contractor selection?

Focus on Energy is Wisconsin's statewide energy efficiency and renewable energy program, funded by Wisconsin utilities and administered by DSPS. Focus on Energy offers rebates for residential solar installations through participating installers. To participate in the Focus on Energy solar rebate program, contractors must be approved by the program, which involves additional qualification requirements beyond the base licensing.

If you plan to apply for a Focus on Energy rebate, confirm your solar contractor is a participating installer in the program. This adds a quality filter beyond the baseline licensing requirements. Non-participating contractors can still legally install solar in Wisconsin — you just won't be eligible for the program rebate if you use them.

What permits are required for solar installation in Wisconsin?

Wisconsin requires a building permit for all roof-mounted solar installations, issued by the local building department. The Dwelling Contractor license holder must apply for the permit. Electrical permits are required for all wiring work and are inspected by state-licensed electrical inspectors. We Energies, Madison Gas and Electric, Alliant Energy, and other Wisconsin utilities must approve grid interconnection before the system can be activated.

Wisconsin has specific structural requirements for solar installations. The installation must not compromise the roof's load-bearing capacity, and the attachment points must meet Wisconsin Building Code standards. A licensed solar contractor will conduct a structural assessment and include load calculations in the permit application.

What insurance should a Wisconsin solar contractor carry?

Wisconsin DSPS requires Electrical Contractors and Dwelling Contractors to maintain general liability insurance and workers' compensation. For a residential solar installation, require at least $300,000 per occurrence in general liability. Solar installers work on rooftops, a high-risk environment, so workers' comp verification is particularly important.

Request Certificates of Insurance and verify both policies are active with the insurers before work begins. Wisconsin's workers' comp system is well-enforced. A contractor who misclassifies employees as independent contractors to avoid workers' comp is a compliance red flag. Use CheckLicensed.com to verify Wisconsin solar contractor credentials before signing any installation agreement.