| Abbreviation | Definition |
|---|---|
| INE | Institute for New Energy |
| INEP | Integrated National Energy Planning |
| INER | Institute of Nuclear Energy Research |
| INORE | International Network on Offshore Renewable Energy |
| INOWER | International Network on Offshore Wind Energy Research |
| IOE | Internet of Energy |
| IOEN | Internet Of Energy Network |
| IPA | Indonesian Petroleum Association |
| IPEH | Intelligent Products with Energy Harvesting |
| IPREE | Internship Program for Renewable Energy Engineering |
| IRE | Infrared Radiant Energy |
| IREA | Illinois Renewable Energy Association |
| IREA | International Renewable Energy Alliance |
| IREC | International Renewable Energy Congress |
| IREC | Interstate Renewable Energy Council |
| IREDA | Indian Renewable Energy Development Agency |
| IREE | Improving Residential Energy Efficiency |
| IREE | Investor Ready Energy Efficiency |
| IREEN | ICT Roadmap for Energy Efficient Neighbourhoods |
| IREF | Indian Renewable Energy Federation |