Wolter Inc is Wisconsin and Upper Michigan’s premier provider of generator service, maintenance, and repair for Generac and all major brands. Our factory-certified technicians are equipped with state-of-the-art, four-wheel-drive service vehicles, capable of reaching almost any customer location in any weather, ensuring your backup power is reliable when you need it most.

We provide comprehensive service for all makes and models of generators, including preventive maintenance, emergency repairs, load bank testing, and fuel system polishing. Wolter keeps critical facilities powered and compliant, from fire stations, hospitals, schools, and data centers to municipal buildings, apartment complexes, hotels, assisted living centers, and wastewater treatment plants.

Serving Milwaukee, Waukesha, Madison, Green Bay, Wausau, Eau Claire, La Crosse, and throughout Upper Michigan, Wolter is the trusted partner for businesses and facilities that cannot afford downtime. Count on Wolter’s generator experts to protect your investment and ensure your standby generators perform when it matters most.