| 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 | 1.0 | 377.3 |
| 2 | Efficient Energy of Tennessee | 127 | Knoxville | TN | 17 | Commercial | EPC | 10.9 | 6.5 |
| 3 | LightWave Solar | 175 | Nashville | TN | 52 | Commercial | EPC | 54,833.0 | 4.0 |
| 4 | Vis Solis | 298 | Franklin | TN | 5 | Commercial | Developer | 13.0 | 1.2 |
| 5 | Tennessee Solar Solutions | 309 | Chattanooga | TN | 19 | Commercial | EPC | 13.0 | 1.2 |
| 6 | Ace LLC Solar | 319 | Pulaski | TN | 20 | Commercial | Developer | 4.0 | 1.0 |
| 7 | GES Solar | 351 | Knoxville | TN | 12 | Commercial | EPC | 4.0 | 0.8 |
| 8 | GreenForm | 352 | Chattanooga | TN | 22 | Residential | Rooftop Contractor | 3.0 | 0.8 |
| 9 | ARiES Energy | 461 | Knoxville | TN | 14 | Commercial | EPC | 2.0 | 0.2 |
| 10 | EcoLogical Energy Systems | 487 | Bristol | TN | 10 | Residential | EPC | 1.1 | 0.1 |
| 11 | Appalachian Renewable Resources | 492 | Knoxville | TN | 1 | Residential | Rooftop Contractor | 1.5 | 0.1 |
| 12 | Construction Art | 494 | Afton | TN | 10 | Commercial | Rooftop Contractor | 1.0 | 0.1 |