2025 Top Maine Solar Contractors
This is the 2025 list of Top Solar Contractors completing work in Maine. The kilowatts listed as being installed in the state reflect only kilowatts installed in Maine 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 Maine could come from installations in all markets (residential, commercial, community solar, utility) but only within Maine 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.
| Maine Rank | Company | kW Installed In Maine | Markets Served | Primary Service | Total kW installed in U.S. in 2024 | Overall Rank |
|---|---|---|---|---|---|---|
| 1 | Altus Power | 48,171.80 | C&I | CS | Developer | 73,257.89 | 63 |
| 2 | Nexamp | 35,286.53 | CS | Developer | 269,148.48 | 31 |
| 3 | Standard Solar | 27,033.85 | U | C&I | CS | Developer | 203,996.54 | 35 |
| 4 | Encore Renewable Energy | 24,937.00 | CS | Developer | 24,937.00 | 115 |
| 5 | ReVision Energy | 22,838.05 | C&I | CS | R | Installer | 36,168.42 | 92 |
| 6 | SunVest Solar | 13,459.56 | C&I | CS | Developer | 81,552.86 | 54 |
| 7 | DMH Services | 12,970.00 | C&I | CS | Installation Subcontractor | 67,339.00 | 68 |
| 8 | ACE Solar | 12,212.55 | C&I | EPC | 74,013.36 | 62 |
| 9 | Freedom Forever | 11,456.39 | R | Installer | 400,513.83 | 25 |
| 10 | Vanguard Energy Partners | 11,280.00 | U | EPC | 176,516.80 | 40 |
| 11 | Mill Creek Renewables | 9,194.40 | U | CS | EPC | 385,456.13 | 27 |
| 12 | Catalyze | 8,929.44 | C&I | CS | Developer | 81,381.13 | 55 |
| 13 | DCE Services | 7,759.64 | C&I | Installation Subcontractor | 116,909.53 | 46 |
| 14 | Ameresco | 6,900.00 | C&I | CS | Developer | 84,151.28 | 53 |
| 15 | REC Power | 6,752.16 | C&I | Developer | 36,616.71 | 89 |
| 16 | Norwich Solar | 5,950.47 | U | C&I | CS | EPC | 12,165.18 | 147 |
| 17 | Quanta Services | 5,355.00 | U | EPC | 10,106,563.89 | 1 |
| 18 | Maine Solar Solutions | 4,502.20 | C&I | R | Installer | 4,502.20 | 222 |
| 19 | Sole Contracting | 2,887.11 | C&I | CS | Installation Subcontractor | 136,884.67 | 44 |
| 20 | Aegis Renewable Energy | 1,898.18 | C&I | EPC | 2,469.20 | 275 |
| 21 | iBuild Solar | 1,391.00 | C&I | Installation Subcontractor | 36,165.58 | 93 |
| 22 | Verogy | 1,246.96 | U | C&I | Developer | 28,306.02 | 107 |
| 23 | Dynamic Energy | 1,244.16 | C&I | CS | EPC | 31,915.00 | 100 |
| 24 | Solect Energy | 137.70 | C&I | Developer | 25,205.19 | 113 |
| 25 | Solaris Renewables | 23.33 | R | Installer | 1,253.65 | 341 |
| 26 | New England Clean Energy | 6.30 | R | Installer | 2,000.05 | 293 |