| Company | City | Service Type | Products |
| AEG Energy Solutions | Knoxville | Residential, ,Commercial, | Solar Electric (pv), Solar Hot Water (thermal), |
| Alternate Energy Group | Knoxville | Residential, | Solar Electric (pv), |
| ARiES Energy | Lenoir City | Residential, ,Commercial, ,Utilities, ,Municipal, | Solar Electric (pv), Solar Hot Water (thermal), |
| Automated Home Technologies | Hendersonville | Residential, | Solar Electric (pv), |
| Big Frog Mountain Corporation | Chattanooga | Residential, | Solar Electric (pv), |
| Home Free Solar – SolarTEK | Lebanon | Residential, ,Commercial, | Solar Electric (pv), |
| Lightwave Solar Electric | Nashville | Residential, | Solar Electric (pv), |
| Mainstream Green Solutions | Wildersville | Residential, ,Commercial, ,Municipal, | Solar Electric (pv), |
| Simple Energy Works | crossville | Residential, ,Commercial, ,Municipal, | Solar Electric (pv), |
| Solar & Renewable Power Systems | Jackson | Residential, | Solar Electric (pv), |
| Solar Plexus | Nashville | Residential, | Solar Electric (pv), |
| Southern Solar and Electric | Brighton | Residential, | Solar Electric (pv), |
| Sundog Solar Energy | Nashville | Residential, ,Commercial, | Solar Electric (pv), |
| Sustainable Future | Harriman | Residential, | Solar Electric (pv), |
| Thermal Dynamics | Brentwood | Residential, | Solar Electric (pv), |
