| Company | City | Service Type | Products |
| Able Energy Co | River Falls | Residential, Commercial, Utility Scale Projects Municipal, | |
| Albright Electric & Solar | Evansville | Residential, | Solar Electric (pv), |
| Arch Electric | Plymouth | Residential, | Solar Electric (pv), |
| Aur Solar | Milwaukee | Residential, | Solar Electric (pv), |
| Carr Creek Electric Service | Woodville | Residential, | Solar Electric (pv), |
| Eland Electric Corp. | Green Bay | Residential, | Solar Electric (pv), |
| Energize | Winneconne | Residential, | Solar Electric (pv), |
| Energy Concepts | Hudson | Residential, | Solar Electric (pv), |
| Engineering Services Co. | Blanchardville | Residential, | Solar Electric (pv), |
| Freier’s Comfort by Design | Ellsworth | Residential, | Solar Electric (pv), |
| Freier’s Comfort by Design-Hudson | Hudson | Residential, | Solar Electric (pv), |
| Full Spectrum Solar | Madison | Residential, ,Commercial, ,Municipal, | Solar Electric (pv), Solar Hot Water (thermal), Solar Pool Heating, |
| GreenSky Energetics. | Manitowoc | Residential, | Solar Electric (pv), |
| H & H Solar Energy Services | Madison | Residential, ,Commercial, | Solar Electric (pv), |
| Lake Michigan Wind & Sun | Sturgeon Bay | Residential, | Solar Electric (pv), |
| Legacy Solar | Frederic | Residential, | Solar Electric (pv), |
| Next Step Energy | Eau Claire | Residential, | Solar Electric (pv), |
| North Wind Renewable Energy | Stevens Point | Residential, ,Commercial, ,Municipal, | Solar Electric (pv), Solar Hot Water (thermal), Solar Pool Heating, |
| Photovoltaic System | Amherst | Residential, | Solar Electric (pv), |
| PhotoVoltaic Systems | Amherst | Residential, | Solar Electric (pv), |
| Pipkin Electric | Sparta | Residential, | Solar Electric (pv), |
| Power Control | New Berlin | Residential, | Solar Electric (pv), |
| URE – Unlimited Renewable Energies | Prairie du Sac | Commercial, ,Municipal, | Solar Electric (pv), Solar Hot Water (thermal), Solar Pool Heating, Wind Power, |
