| Rank | Company | Overall Rank | City | State | Employees | Primary Market | Primary Service | Total Megawatts Installed | Total Megawatts 2016 |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Signal Energy | 10 | Chattanooga | TN | 127 | Utility | EPC | 6,893,000.00 | 377.34 |
| 2 | Efficient Energy of Tennessee | 127 | Knoxville | TN | 17 | Commercial | EPC | 10.91 | 6.53 |
| 3 | LightWave Solar | 175 | Nashville | TN | 52 | Commercial | EPC | 86,000.00 | 4.00 |
| 4 | Vis Solis | 298 | Franklin | TN | 5 | Commercial | Developer | 13.00 | 1.20 |
| 5 | Tennessee Solar Solutions | 309 | Chattanooga | TN | 19 | Commercial | EPC | 13.00 | 1.15 |
| 6 | Ace LLC Solar | 319 | Pulaski | TN | 20 | Commercial | Developer | 5,550.00 | 1.04 |
| 7 | GES Solar | 351 | Knoxville | TN | 12 | Commercial | EPC | 4.00 | 0.77 |
| 8 | GreenForm | 352 | Chattanooga | TN | 22 | Residential | Rooftop Contractor | 3.00 | 0.77 |
| 9 | ARiES Energy | 461 | Knoxville | TN | 14 | Commercial | EPC | 2.00 | 0.21 |
| 10 | EcoLogical Energy Systems | 487 | Bristol | TN | 10 | Residential | EPC | 1.06 | 0.12 |
| 11 | Appalachian Renewable Resources | 492 | Knoxville | TN | 1 | Residential | Rooftop Contractor | 1.45 | 0.10 |
| 12 | Construction Art | 494 | Afton | TN | 10 | Commercial | Rooftop Contractor | 1.00 | 0.10 |
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