| Company | City | Service Type | Products |
| Blue Sky Solar and Wind Power | New Castle | Residential, ,Commercial, | Solar Electric (pv), Wind Power, |
| Clean Energy USA | Rehoboth Beach | Residential, | Solar Electric (pv), |
| Clear Horizon, LLC | New Castle | Residential, ,Commercial, | Solar Electric (pv), Solar Pool Heating, |
| CMI Electric | Newark | Residential, | Solar Electric (pv), |
| CMI Solar Electric | Newark | Residential, | Solar Electric (pv), |
| Eclipse Solar Specialists | Wilmington | Residential, | Solar Electric (pv), |
| Flexera | Harbeson | Residential, | Solar Electric (pv), |
| Green Street Solar | Selbyville | Residential, | Solar Electric (pv), |
| Jbs Solar And Wind – Middletown | Middletown | Residential, | Solar Electric (pv), |
| KW Solar Solutions | Newark | Residential, | Solar Electric (pv), |
| McConnell Energy Solutions | Wilmington | Residential, | Solar Electric (pv), |
| Solair | Millsboro | Residential, | Solar Electric (pv), |
| Solar Source | Wilmington | Residential, | Solar Electric (pv), |
| SunEnergy Technologies | Newark | Residential, | Solar Electric (pv), |
| Suntricity Power | New Castle | Residential, | Solar Electric (pv), |
| Wise Power Systems | Wilmington | Residential, | Solar Electric (pv), |
