★ 2026 Top Solar Contractors
2026 Top Illinois Solar Contractors
This is the 2026 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 2025. 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 2026 Top Solar Contractors List, organized by kilowatts (DC) installed in 2025.
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 2025 | Overall Rank |
|---|---|---|---|---|---|---|
| 1 | McCarthy Building Companies | 1,371,000.00 | U | EPC | 3,649,000.00 | 3 |
| 2 | J.F. Electric | 394,829.00 | U | C&I | CS | Electrical Subcontractor | 394,829.00 | 27 |
| 3 | Quanta Services | 352,071.00 | U | EPC | 6,113,906.46 | 1 |
| 4 | SOLV Energy | 339,000.00 | U | C&I | CS | EPC | 2,500,000.00 | 5 |
| 5 | Conductor Power | 326,000.00 | U | Electrical Subcontractor | 878,000.00 | 14 |
| 6 | CoVolt Power | 215,000.00 | U | EPC | 755,000.00 | 17 |
| 7 | Westphal & Co. | 183,070.00 | U | C&I | CS | Electrical Subcontractor | 352,109.40 | 30 |
| 8 | Granite Industrial | 183,070.00 | U | Installation Subcontractor | 1,393,850.00 | 8 |
| 9 | Nexamp | 127,987.77 | CS | Developer | 245,711.53 | 35 |
| 10 | Knobelsdorff (KE) | 120,685.00 | CS | EPC | 150,889.00 | 43 |
| 11 | Sun Energy Solar LLC | 66,539.27 | CS | Electrical Subcontractor | 73,554.27 | 59 |
| 12 | Standard Solar | 63,784.35 | U | C&I | CS | Developer | 156,901.70 | 41 |
| 13 | Pivot Energy | 59,713.38 | C&I | CS | Developer | 126,628.24 | 47 |
| 14 | SunVest Solar | 55,260.00 | C&I | CS | Developer | 62,640.00 | 64 |
| 15 | MARS Energy Group | 51,172.55 | C&I | CS | R | EPC | 121,178.43 | 49 |
| 16 | Arch | 51,114.00 | C&I | CS | R | Installer | 58,673.89 | 67 |
| 17 | Recon Corp. | 44,914.00 | U | EPC | 44,914.00 | 81 |
| 18 | United Renewable Energy | 41,555.00 | U | EPC | 86,462.00 | 53 |
| 19 | Ideal Energy | 35,767.90 | U | C&I | Electrical Subcontractor | 45,613.40 | 79 |
| 20 | DCE Services | 35,346.87 | C&I | Installation Subcontractor | 111,895.30 | 51 |
| 21 | E Light Electric | 35,000.00 | U | CS | EPC | 444,190.00 | 24 |
| 22 | GenPro Energy Solutions | 32,603.00 | CS | EPC | 37,853.00 | 94 |
| 23 | Evergreen Renewables | 31,550.00 | U | CS | EPC | 79,883.00 | 57 |
| 24 | Casey Electric | 24,217.00 | U | C&I | R | Electrical Subcontractor | 33,977.27 | 96 |
| 25 | Continental Energy Solutions | 22,646.02 | C&I | CS | EPC | 22,646.02 | 110 |
| 26 | Catalyze | 16,588.26 | C&I | CS | Developer | 154,357.47 | 42 |
| 27 | 93Energy | 15,953.18 | C&I | CS | EPC | 15,953.18 | 134 |
| 28 | New Energy Equity | 15,500.00 | C&I | CS | Developer | 85,831.87 | 54 |
| 29 | Next Generation Solar | 15,124.50 | C&I | CS | Installation Subcontractor | 56,496.67 | 69 |
| 30 | Melink Solar | 13,988.00 | U | C&I | EPC | 49,150.55 | 76 |
| 31 | LiveWire Construction | 13,981.00 | U | C&I | CS | Electrical Subcontractor | 13,981.00 | 141 |
| 32 | Solar Landscape | 13,819.49 | C&I | Developer | 101,371.03 | 52 |
| 33 | ACE Solar | 13,524.00 | C&I | EPC | 43,572.68 | 83 |
| 34 | ECCS | 11,650.00 | C&I | Installation Subcontractor | 43,550.00 | 84 |
| 35 | StraightUp Solar | 11,359.23 | C&I | R | EPC | 12,576.29 | 146 |
| 36 | Tron Solar | 8,844.52 | C&I | R | Installer | 9,488.75 | 167 |
| 37 | Fresh Coast Solar | 8,326.13 | C&I | R | Installer | 8,326.13 | 176 |
| 38 | iBuild Solar | 7,738.20 | C&I | Installation Subcontractor | 25,914.07 | 106 |
| 39 | Northern Sun Energy | 7,500.00 | U | EPC | 77,940.00 | 58 |
| 40 | Radiance Solar | 7,193.92 | C&I | CS | EPC | 20,105.32 | 117 |
| 41 | Sole Contracting | 6,987.08 | C&I | CS | Installation Subcontractor | 83,483.99 | 55 |
| 42 | Windfree Solar | 6,059.75 | C&I | CS | R | EPC | 6,087.37 | 202 |
| 43 | Alta Energy Services | 6,000.00 | U | CS | Installation Subcontractor | 67,440.00 | 62 |
| 44 | SunPeak | 5,749.00 | C&I | EPC | 7,747.00 | 183 |
| 45 | Verde Solutions | 5,702.92 | C&I | EPC | 6,232.37 | 198 |
| 46 | 1Earth Solar | 5,523.59 | C&I | R | Installer | 5,523.59 | 209 |
| 47 | Cedar Creek Energy | 5,498.40 | C&I | CS | R | EPC | 24,184.50 | 109 |
| 48 | LightWave Solar | 5,234.16 | C&I | R | EPC | 8,168.76 | 178 |
| 49 | Renewable Energy Evolution | 4,565.83 | C&I | Developer | 4,565.83 | 224 |
| 50 | Iconic Energy | 4,547.91 | C&I | R | Installer | 4,547.91 | 225 |
| 51 | Veregy | 4,106.00 | C&I | EPC | 20,436.50 | 116 |
| 52 | Guarantee Electrical | 4,006.96 | C&I | Installer | 4,119.71 | 238 |
| 53 | Victory Energy | 3,169.58 | R | Installer | 10,130.12 | 161 |
| 54 | Unity Solar Group | 3,145.10 | R | Installer | 3,145.10 | 264 |
| 55 | Source Solar | 2,961.34 | C&I | R | Installer | 3,166.61 | 263 |
| 56 | RxSun | 2,699.18 | R | Sales Partner | 2,699.18 | 273 |
| 57 | Big Shine Energy | 2,500.00 | C&I | EPC | 31,200.00 | 98 |
| 58 | Stateline Solar | 2,310.27 | C&I | R | Installer | 2,401.55 | 282 |
| 59 | ION Solar | 2,200.59 | R | Installer | 56,430.60 | 70 |
| 60 | Solar One | 2,191.16 | C&I | Developer | 5,310.46 | 212 |
| 61 | Sun Solar | 2,189.51 | C&I | R | Installer | 6,899.02 | 192 |
| 62 | Eagle Point Solar | 2,176.18 | C&I | R | Installer | 12,355.71 | 147 |
| 63 | Sunstall | 2,080.72 | U | C&I | CS | Installation Subcontractor | 50,989.94 | 73 |
| 64 | EMPWR Solar | 1,981.95 | R | Installer | 18,891.40 | 122 |
| 65 | 360 Electric | 1,475.33 | C&I | R | Installer | 1,475.33 | 320 |
| 66 | Tick Tock Energy | 1,283.23 | C&I | R | EPC | 1,283.23 | 329 |
| 67 | Earthlight Technologies | 881.70 | C&I | R | Installer | 20,708.11 | 114 |
| 68 | REC Power | 881.27 | C&I | Developer | 11,368.73 | 154 |
| 69 | Dynamic Energy | 881.00 | C&I | CS | Developer | 7,633.00 | 185 |
| 70 | Solar Mounts | 724.37 | U | C&I | Installation Subcontractor | 37,975.97 | 93 |
| 71 | dGEN Energy Partners | 657.00 | C&I | Developer | 24,409.00 | 107 |
| 72 | SolQ | 456.60 | R | Installer | 4,202.75 | 235 |
| 73 | All Energy Solar | 446.44 | C&I | R | Installer | 16,404.09 | 130 |
| 74 | ForeFront Power | 271.15 | C&I | Developer | 41,670.57 | 87 |
| 75 | Sonne Energy Solutions | 141.83 | R | Installer | 141.83 | 383 |
| 76 | ECG Solar | 121.13 | C&I | R | Installer | 5,018.77 | 215 |
| 77 | HSI Solar | 92.20 | C&I | Developer | 2,868.73 | 271 |
| 78 | Artisun Solar | 75.44 | C&I | Installer | 8,150.73 | 179 |
| 79 | Energy Solutions | 34.35 | C&I | R | Installer | 744.59 | 358 |
| 80 | Morton Solar | 10.80 | C&I | R | Installer | 640.81 | 360 |