★ 2025 Top Solar Contractors
2025 Top Illinois Solar Contractors
This is the 2025 list of Top Solar Contractors completing work in Illinois. The kilowatts listed as being installed in the state reflect only kilowatts installed in Illinois 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 Illinois could come from installations in all markets (residential, commercial, community solar, utility) but only within Illinois 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.
| Illinois Rank | Company | kW Installed In Illinois | Markets Served | Primary Service | Total kW installed in U.S. in 2024 | Overall Rank |
|---|---|---|---|---|---|---|
| 1 | McCarthy Building Companies | 956,000.00 | U | EPC | 2,794,000.00 | 6 |
| 2 | Quanta Services | 473,967.54 | U | EPC | 10,106,563.89 | 1 |
| 3 | CoVolt Power | 207,000.00 | U | EPC | 981,600.00 | 12 |
| 4 | Kiewit Energy Group | 195,000.00 | U | EPC | 3,113,000.00 | 4 |
| 5 | Primoris Renewable Energy | 189,000.00 | U | EPC | 2,900,000.00 | 5 |
| 6 | J.F. Electric | 183,150.00 | U | C&I | CS | Electrical Subcontractor | 183,150.00 | 38 |
| 7 | Gemma Renewable Power | 155,500.00 | U | EPC | 155,500.00 | 43 |
| 8 | Recon Corp. | 84,272.90 | U | EPC | 84,272.90 | 52 |
| 9 | Nexamp | 65,102.27 | CS | Developer | 269,148.48 | 31 |
| 10 | New Energy Equity | 43,189.90 | C&I | CS | Developer | 72,901.47 | 64 |
| 11 | SunVest Solar | 40,981.30 | C&I | CS | Developer | 81,552.86 | 54 |
| 12 | Freedom Forever | 40,024.89 | R | Installer | 400,513.83 | 25 |
| 13 | Sun Energy Solar LLC | 36,597.38 | CS | Electrical Subcontractor | 36,597.38 | 90 |
| 14 | Evergreen Renewables | 35,685.00 | U | CS | EPC | 57,766.00 | 77 |
| 15 | Alta Energy Services | 33,000.00 | U | CS | Installation Subcontractor | 67,000.00 | 69 |
| 16 | Arch | 30,744.60 | C&I | CS | R | Installer | 36,499.88 | 91 |
| 17 | Knobelsdorff (KE) | 26,390.00 | CS | EPC | 105,850.00 | 50 |
| 18 | Next Generation Solar | 22,476.02 | C&I | CS | EPC | 79,699.34 | 56 |
| 19 | Nelnet Renewable Energy | 21,049.00 | C&I | EPC | 35,253.00 | 95 |
| 20 | Pivot Energy | 19,754.91 | C&I | CS | Developer | 164,727.59 | 42 |
| 21 | NoBull Energy | 18,800.00 | U | EPC | 301,800.00 | 29 |
| 22 | New Energy Structures Company (NESCO) | 17,959.00 | U | CS | EPC | 35,207.00 | 96 |
| 23 | Benchmark Electrical Solutions | 15,165.58 | U | C&I | Electrical Subcontractor | 233,280.33 | 33 |
| 24 | Radiance Solar | 14,119.05 | C&I | CS | EPC | 53,604.54 | 83 |
| 25 | Continental Energy Solutions | 12,246.54 | C&I | CS | EPC | 12,324.30 | 143 |
| 26 | Victory Energy | 11,889.61 | R | Installer | 12,408.01 | 142 |
| 27 | StraightUp Solar | 10,057.76 | C&I | R | EPC | 11,396.99 | 157 |
| 28 | SunPeak | 9,779.58 | C&I | EPC | 12,192.53 | 144 |
| 29 | Guarantee Electrical | 8,154.00 | C&I | Electrical Subcontractor | 12,099.00 | 148 |
| 30 | Fresh Coast Solar | 7,817.85 | C&I | R | Installer | 7,817.85 | 180 |
| 31 | OnSwitch | 7,768.00 | C&I | EPC | 11,191.30 | 158 |
| 32 | Newkirk Electric Associates | 6,050.00 | U | C&I | Electrical Subcontractor | 16,014.00 | 130 |
| 33 | Tron Solar | 5,869.68 | C&I | R | EPC | 12,174.03 | 146 |
| 34 | Verde Solutions | 5,097.13 | C&I | EPC | 5,169.19 | 211 |
| 35 | Sun Solar | 4,203.36 | C&I | R | EPC | 9,732.97 | 163 |
| 36 | Standard Solar | 3,998.43 | U | C&I | CS | Developer | 203,996.54 | 35 |
| 37 | Casey Electric | 3,975.00 | U | C&I | R | Electrical Subcontractor | 3,975.00 | 231 |
| 38 | 93Energy | 3,915.56 | C&I | CS | EPC | 3,915.56 | 233 |
| 39 | Windfree Solar | 3,829.57 | C&I | CS | R | Installer | 4,110.68 | 228 |
| 40 | Source Solar | 3,595.29 | C&I | R | Installer | 3,884.85 | 234 |
| 41 | Ameresco | 3,500.00 | C&I | CS | Developer | 84,151.28 | 53 |
| 42 | Tick Tock Energy | 3,455.05 | C&I | R | Installer | 3,455.05 | 243 |
| 43 | Renewable Energy Evolution | 3,217.92 | C&I | EPC | 3,217.92 | 251 |
| 44 | Utopian Power | 3,213.00 | C&I | Developer | 3,479.00 | 241 |
| 45 | Unity Solar Group | 3,207.32 | R | Developer | 3,207.32 | 252 |
| 46 | LightWave Solar | 3,148.00 | C&I | R | EPC | 7,301.51 | 186 |
| 47 | United Renewable Energy | 3,100.00 | U | EPC | 92,160.00 | 51 |
| 48 | PowerFlex | 3,000.00 | C&I | CS | Developer | 55,868.00 | 79 |
| 49 | iBuild Solar | 2,849.42 | C&I | Installation Subcontractor | 36,165.58 | 93 |
| 50 | Stateline Solar | 2,629.92 | C&I | R | Installer | 2,668.54 | 270 |
| 51 | Eagle Point Solar | 2,556.77 | C&I | R | EPC | 11,765.01 | 152 |
| 52 | GenPro Energy Solutions | 2,520.00 | CS | EPC | 23,548.87 | 119 |
| 53 | DCE Services | 2,421.04 | C&I | Installation Subcontractor | 116,909.53 | 46 |
| 54 | RxSun | 2,303.42 | R | Developer | 2,303.42 | 282 |
| 55 | Arevon Energy | 2,240.00 | U | C&I | Developer | 557,158.00 | 21 |
| 56 | 360 Electric | 1,740.98 | C&I | R | Installer | 1,740.98 | 310 |
| 57 | Solar One | 1,730.84 | C&I | Developer | 8,194.74 | 174 |
| 58 | Veregy | 1,484.80 | C&I | EPC | 18,165.13 | 125 |
| 59 | ION Solar | 1,349.56 | R | EPC | 53,776.13 | 82 |
| 60 | Solar Landscape | 1,238.96 | C&I | Developer | 62,623.85 | 75 |
| 61 | Ideal Energy | 1,188.80 | U | C&I | EPC | 11,028.31 | 159 |
| 62 | Artisun Solar | 1,105.30 | C&I | Installer | 11,806.91 | 151 |
| 63 | PSG Energy Group | 1,103.60 | C&I | EPC | 1,481.80 | 320 |
| 64 | M Bar C Construction | 960.00 | C&I | Installation Subcontractor | 77,440.00 | 58 |
| 65 | ARCO/Murray Power Solutions (AMPS) | 776.50 | C&I | EPC | 4,057.00 | 230 |
| 66 | Altus Power | 760.84 | C&I | CS | Developer | 73,257.89 | 63 |
| 67 | Dynamic Energy | 660.42 | C&I | CS | EPC | 31,915.00 | 100 |
| 68 | Aggreko Energy Transition Solutions | 546.00 | C&I | CS | Developer | 65,357.20 | 73 |
| 69 | Sonne Energy Solutions | 296.99 | R | Installer | 296.99 | 391 |
| 70 | Montante Solar | 111.30 | C&I | CS | EPC | 8,969.73 | 169 |
| 71 | All Energy Solar | 79.82 | C&I | R | Installer | 26,438.91 | 110 |
| 72 | Morton Solar | 43.52 | C&I | R | EPC | 594.94 | 376 |
| 73 | SolQ | 38.73 | R | EPC | 2,741.20 | 267 |
| 74 | HSI Solar | 33.48 | C&I | Developer | 9,241.90 | 168 |
| 75 | ECG Solar | 10.75 | C&I | R | Installer | 3,475.29 | 242 |
| 76 | Semper Solaris | 7.29 | R | Installer | 11,817.80 | 150 |