2025 Top Wisconsin Solar Contractors
This is the 2025 list of Top Solar Contractors completing work in Wisconsin The kilowatts listed as being installed in the state reflect only kilowatts installed in Wisconsin in 2024. Companies listed on this state list could be headquartered in other states, participate in any market (residential, commercial, community solar, utility) and provide any installation service (EPC, developer, installer, installation subcontractor, electrical subcontractor, sales partner).
The listed kilowatts installed by each company in Wisconsin could come from installations in all markets (residential, commercial, community solar, utility) but only within Wisconsin state lines.
The companies below are a segmented portion of the overall 2025 Top Solar Contractors List, organized by kilowatts (DC) installed in 2024.
For more information on Solar Power World‘s annual Top Solar Contractors List and additional sublists, visit our Top Solar Contractors home page.
| Wisconsin Rank | Company | kW Installed In Wisconsin | Markets Served | Primary Service | Total kW installed in U.S. in 2024 | Overall Rank |
|---|---|---|---|---|---|---|
| 1 | Quanta Services | 574,582.92 | U | EPC | 10,106,563.89 | 1 |
| 2 | Knobelsdorff (KE) | 31,630.00 | CS | EPC | 105,850.00 | 50 |
| 3 | Pieper Electric | 21,450.42 | U | C&I | EPC | 21,450.42 | 122 |
| 4 | SunVest Solar | 20,998.00 | C&I | CS | Developer | 81,552.86 | 54 |
| 5 | Westphal & Co. | 15,598.00 | U | C&I | CS | Electrical Subcontractor | 15,598.00 | 131 |
| 6 | ISI Solar | 9,486.24 | U | EPC | 55,817.44 | 81 |
| 7 | Faith Technologies Inc. (FTI) | 7,531.37 | C&I | EPC | 11,431.61 | 155 |
| 8 | Standard Solar | 6,506.50 | U | C&I | CS | Developer | 203,996.54 | 35 |
| 9 | Arch | 5,755.28 | C&I | CS | R | Installer | 36,499.88 | 91 |
| 10 | Eagle Point Solar | 3,687.19 | C&I | R | EPC | 11,765.01 | 152 |
| 11 | All Energy Solar | 2,988.51 | C&I | R | Installer | 26,438.91 | 110 |
| 12 | Nelnet Renewable Energy | 1,470.00 | C&I | EPC | 35,253.00 | 95 |
| 13 | Endries Solar & Electric | 1,333.23 | C&I | R | Installer | 1,333.23 | 332 |
| 14 | Freedom Forever | 1,248.47 | R | Installer | 400,513.83 | 25 |
| 15 | Ethos Green Power Cooperative | 1,186.29 | C&I | R | Installer | 1,186.29 | 344 |
| 16 | Home Team Energy | 964.42 | R | Installer | 964.42 | 352 |
| 17 | Current Electric | 844.01 | R | Installer | 844.01 | 359 |
| 18 | SunPeak | 610.14 | C&I | EPC | 12,192.53 | 144 |
| 19 | SolQ | 498.15 | R | EPC | 2,741.20 | 267 |
| 20 | Carlson Electric | 458.18 | R | Installer | 458.18 | 381 |
| 21 | Energy Concepts | 285.77 | C&I | R | EPC | 565.49 | 378 |
| 22 | Windfree Solar | 255.50 | C&I | CS | R | Installer | 4,110.68 | 228 |
| 23 | Tron Solar | 250.74 | C&I | R | EPC | 12,174.03 | 146 |
| 24 | Greenway Solar | 104.15 | C&I | R | Installer | 918.75 | 356 |
| 25 | TruNorth Solar | 85.96 | C&I | R | Installer | 1,417.97 | 324 |
| 26 | Continental Energy Solutions | 77.76 | C&I | CS | EPC | 12,324.30 | 143 |
| 27 | Stateline Solar | 38.62 | C&I | R | Installer | 2,668.54 | 270 |
| 28 | Baja Construction | 36.00 | C&I | EPC | 25,483.07 | 111 |
| 29 | Cedar Creek Energy | 7.70 | C&I | CS | R | EPC | 23,197.78 | 120 |