| ENCYCLIS | Wellingborough, United Kingdom | Visit site |
| ENCYCLIS | Dublin, Ireland | Visit site |
| ENCYCLIS | Liverpool, United Kingdom | Visit site |
| ENCYCLIS | Walsall, United Kingdom | Visit site |
| ENDIPREV | Fânzeres, Portugal | Visit site |
| ENEO - the AEE Lebanon Training Partner | بيروت, Lebanon | Visit site |
| ENEO - the AEE Lebanon Training Partner | Lebanon | Visit site |
| ENEOS Renewable Energy Corporation | 東京都, Japan | Visit site |
| ENERCON | Aurich, Germany | · |
| ENERDIA | Δερύνεια, Cyprus | Visit site |
| ENERGIES DE LOIRE | Candé, France | Visit site |
| ENERGY HANDLE | Maldonado, Uruguay | · |
| ENERGYNEST | Billingstad, Norway | · |
| ENERGÍA SOLAR MÉXICO | Mexico City, Mexico | Visit site |
| ENERLICE | La Couronne, France | Visit site |
| ENERMAT RENOVABLES | Ciudad Real, Spain | Visit site |
| ENERNORTE - ENERGIAS, LDA | Lomba, Portugal | · |
| ENERPLAN | La Ciotat, France | Visit site |
| ENERPRIME ECUADOR CIA LTDA | Quito, Ecuador | Visit site |
| ENERQOS | Milano, Italy | Visit site |
| ENERSADO | Quinta do Anjo, Portugal | Visit site |
| ENERSOL | Herve, Belgium | Visit site |
| ENERSOLEN | Tangier, Morocco | · |
| ENERSOLYS | Bailly-Romainvilliers, France | · |
| ENERSTEEL | Aytré, France | Visit site |
| ENERTAN | Bornova, Türkiye | Visit site |
| ENERTRAG France | Neuville-sur-Oise, France | Visit site |
| ENGIE - International Supply & Energy Management | Düsseldorf, Germany | Visit site |
| ENGIE Africa | South Africa | Visit site |
| ENGIE Brasil | Rio de Janeiro, Brazil | Visit site |
| ENGIE Brasil | Florianópolis, Brazil | Visit site |
| ENGIE Chile | Las Condes, Chile | Visit site |
| ENGIE GREEN | Courbevoie, France | Visit site |
| ENGIE México | Mexico City, Mexico | Visit site |
| ENGIE Solutions France | Courbevoie, France | Visit site |
| ENGIE Vianeo | Courbevoie, France | Visit site |
| ENGYcell | Riga, Latvia | Visit site |
| ENISOLAR Enerji | Konak, Türkiye | Visit site |
| ENKA İnşaat ve Sanayi A.Ş. | Beşiktaş, Türkiye | Visit site |
| ENON SOLUTIONS | Porto, Portugal | Visit site |
| ENOVA Power | Bunde, Germany | Visit site |
| ENOVA Service | Bunde, Germany | Visit site |
| ENPESO GmbH | Osnabrück, Germany | Visit site |
| ENREGO Energy GmbH | Westerstede, Germany | Visit site |
| ENTEKA S.A. - Energy Technologies & Constructions | Chalandri, Greece | Visit site |
| ENVARIS GmbH | Pontevedra, Argentina | · |
| ENVIROSCREEN SYSTEMS LLP | St Albans, United Kingdom | Visit site |
| ENWISE 倍奇能源 | Shanghai, China | · |
| ENcombi | Viborg, Denmark | Visit site |
| EOLOGIX-PING | Graz, Austria | Visit site |
| EOLOS Floating Lidar Solutions | Montcada i Reixac, Spain | Visit site |
| EOMAP | Seefeld, Germany | Visit site |
| EOSGlobe | Kalyan, India | Visit site |
| EP Equipment | China | Visit site |
| EP Equipment | Hangzhou Shi, China | Visit site |
| EPC Solaire | Francheville, France | · |
| EPC engineering | Maadi, Egypt | Visit site |
| EPEC Group | Brisbane, Australia | Visit site |
| EPP Solar | Hamburg, Germany | Visit site |
| EQS Global | a Kiwa company | Maia, Portugal | Visit site |
| EQUATOR SOLAR SYSTEMS LTD | Kampala, Uganda | Visit site |
| ERA SOLAR S.A. | Managua, Nicaragua | Visit site |
| ERBUD GROUP | Warszawa, Poland | Visit site |
| ERG (Air Pollution Control) Ltd | Horsham, United Kingdom | Visit site |
| ERG France | Paris, France | Visit site |
| ERGON PERU | Lima, Peru | Visit site |
| ERGY Soluciones Energéticas | Tuxtla Gutiérrez, Mexico | Visit site |
| ERM | London, United Kingdom | Visit site |
| ERM | Abu Dhabi | Visit site |
| ERREKA | Antzuola, Spain | Visit site |
| ERS Energy Sdn Bhd | Kuala Lumpur, Malaysia | Visit site |
| ESA, Energía Solar Aplicada | València, Spain | Visit site |
| ESAPRO | Milano, Italy | Visit site |
| ESCO Lazio S.r.l | Latina, Italy | Visit site |
| ESE Engineering Services for Energy S.r.l. | Milano, Italy | Visit site |
| ESE Solar | Liverpool, United Kingdom | Visit site |
| ESE Solar | Newmarket, United Kingdom | Visit site |
| ESE Solar | Washington, United Kingdom | Visit site |
| ESG Energy Service Group | Trollenhagen, Germany | Visit site |
| ESHRAQ SOLAR | Al-Riyadh, Saudi Arabia | Visit site |
| ESKA | Sappemeer, Netherlands | · |
| ESKAP GmbH | Nürnberg, Germany | Visit site |
| ESSCO | Al-Riyadh, Saudi Arabia | Visit site |
| EST-Floattech | Energy Storage Solutions | Badhoevedorp, Netherlands | · |
| ESTELA - European Solar Thermal Electricity Association | Brussels, Belgium | · |
| ESW | Bristol, United Kingdom | Visit site |
| ESY Sunhome | München, Germany | · |
| ETA Heiztechnik | Hofkirchen an der Trattnach, Austria | · |
| ETA-max Energy and Environmental Solutions | عمّان, Jordan | Visit site |
| ETERNAL RENEWABLES PVT. LTD | Coimbatore, India | Visit site |
| ETF Partners - The Environmental Technologies Fund | London, United Kingdom | Visit site |
| ETS Efficient Technical Solutions GmbH (Elevion Group) | Gilching, Germany | Visit site |
| ETURN | Alkmaar, Netherlands | Visit site |
| EUROVIA Polska | Kobierzyce, Poland | Visit site |
| EV Charging Clean Energy | Shenzhen Shi, China | Visit site |
| EVADA | Xiamen Shi, China | Visit site |
| EVALOR | Plérin, France | Visit site |
| EVALOR | Landivisiau, France | Visit site |
| EVAR | Seongnam-si, South Korea | Visit site |
| EVBox | Léognan, France | Visit site |
| EVCİL SOLAR ENERJİ | Yenimahalle, Türkiye | Visit site |
| EVCİL SOLAR ENERJİ | Ümraniye, Türkiye | Visit site |
| EVCİL SOLAR ENERJİ | Budapest, Hungary | Visit site |
| EVER GREEN ENERGY TECHNOLOGIES | Ernakulam, India | · |
| EVGES Enerji İnşaat San. ve Tic. A.Ş. | Konak, Türkiye | Visit site |
| EVISE | Leeuwarden, Netherlands | Visit site |
| EVO Power Pty Ltd | Melbourne, Australia | Visit site |
| EVOLEN | Puteaux, France | Visit site |
| EVVO Solar | Chennai, India | Visit site |
| EWEC | Abu Dhabi, United Arab Emirates | Visit site |
| EWS Elektrizitätswerke Schönau eG | Schönau im Schwarzwald, Germany | Visit site |
| EXE Solar | Laives, Italy | Visit site |
| EXO Energy System | Gdynia, Poland | Visit site |
| EXOES | Gradignan, France | Visit site |
| EXOES | France | Visit site |
| EXRA TECHNICAL SERVICES Est | Dubai, United Arab Emirates | Visit site |
| Eab Solar | Magdeburg, Germany | Visit site |
| Each Energy | Suzhou Shi, China | Visit site |
| Earthbond | Lagos, Nigeria | Visit site |
| Easee Energy & Environmental Ltd | Preston, United Kingdom | Visit site |
| East Group | Dongwan Shi, China | Visit site |
| East Penn | United States | Visit site |
| Eastech Solar | Alcorcón, Spain | Visit site |
| Easun Power | Shenzhen Shi, China | Visit site |
| Easy Being Green Pty Ltd | Australia | Visit site |
| Easy-Sun Sàrl | Echallens, Switzerland | Visit site |
| EasyEko | Kraków, Poland | Visit site |
| Eauxwell Nigeria Limited | Lagos, Nigeria | Visit site |
| Eavor Deutschland | Düsseldorf, Germany | Visit site |
| Ebbefos Energy | Skovlunde, Denmark | Visit site |
| Ebbefos Holding A/S | København, Denmark | Visit site |
| Echandia | Bromma, Sweden | Visit site |
| Echion Technologies | Cambridge, United Kingdom | Visit site |
| EchoBolt | Stratford-upon-Avon, United Kingdom | Visit site |
| Eco Energy Improvements | Dundalk, Ireland | Visit site |
| Eco Green Energy | Nantong Shi, China | Visit site |
| Eco Logical Australia Pty Ltd | Sydney, Australia | Visit site |
| Eco Renewable Australia | South West Rocks, Australia | Visit site |
| Eco Shine Solar WA | Perth, Australia | Visit site |
| Eco Solar Rays (Pvt) LTD - Member of Eswaran Brothers Group | Colombo, Sri Lanka | Visit site |
| Eco Watt Solutions Ltd | Chessington, United Kingdom | Visit site |
| Eco Wave Power | Tel Aviv-Yafo, Israel | Visit site |
| Eco'Solutions France - L.C.G | Vaulx-en-Velin, France | Visit site |
| Eco-Tech Ceram | Balma, France | · |
| Eco2Solar Ltd | Kidderminster, United Kingdom | · |
| Eco360 Engineering S.L. | Madrid, Spain | · |
| EcoAct (part of Schneider Electric) | London, United Kingdom | Visit site |
| EcoFund | Rho, Italy | Visit site |
| EcoGreen Australia | Melbourne, Australia | Visit site |
| EcoGrid Energy | Guelph, Canada | · |