| Abbreviation | Definition |
|---|---|
| CEES | Center for Energy Environment and Sustainability |
| CEES | Center for Energy Environmental Sustainability |
| CEF | Clean Energy Fund |
| CEF | Cooperative Energy Futures |
| CEFC | Clean Energy Finance Corporation |
| CEFE | Clean Energy for Eternity |
| CEFF | Clean Energy Finance Facility |
| CEG | Clark Energy Group |
| CEG | Clean Energy Group |
| CEG | Constellation Energy Group |
| CEGE | Centre of Excellence for Geothermal Energy |
| CEHE | CenterPoint Energy Houston Electric |
| CEI | Camber Energy Inc |
| CEI | Clean Energy Institute |
| CEI | Comprehensive Energy International |
| CEIC | Continuous Energy Improvement Commissioning |
| CEIP | Clean Energy Incentive Program |
| CEIS | Caribbean Energy Information System |
| CEL | Cool Energy Link |
| CELD | Clean Energy Lobby Day |