| Abbreviation | Definition |
|---|---|
| EREF | ECOWAS Renewable Energy Facility |
| ERF | Energy Recovery Facility |
| ERG | Energy and Resources Group |
| ERI | Energy Recovery Inc |
| ERI | Energy Research Initiative |
| ERIC | Energy Resources for Integrated Communities |
| ERIS | Energy Risk and Insurance Specialist |
| ERL | Energy Recovery Linac |
| ERMP | Energy Reduction in Mechanical Pulping |
| EROI | Energy Recovery Operations Inc |
| EROI | Energy Returned On Invested |
| EROI | Energy Returned On Investment |
| EROL | Exploration & Environmental Reports Online Lodgement |
| ERP | Energy Recovery Products |
| ERP | Energy related Products |
| ERP | Energy Risk Professional |
| ERPT | Energy redistribution path tracing |
| ERRA | Energy Regulators Regional Association |
| ERRA | Energy Resource Recovery Account |
| ERRA | Energy Resources Recovery Account |