Utility Rates for distributive generation such as solar PV are filed with the Public Service Commission of Wisconsin, and can be found in the associated rate tariffs.
Energysage
Solar panel calculator to quickly estimate your solar potential and savings by address. Estimates are based on your roof, electricity bill, and actual offers in your area.
Solar-estimate.org
Web-based solar cost and savings estimator that gives a rough idea of the solar potential of your home before deciding if you want to talk to a solar company.
Project Sunroof
Your own personalized solar savings estimator, powered by Google Earth imagery.
PVWatts
Estimates the energy production and cost of energy of grid-connected photovoltaic (PV) energy systems.