| EcoMT | A Coruña, Spain | Visit site |
| EcoPhi | Göteborg, Sweden | Visit site |
| EcoPower - Energia Solar | São Paulo, Brazil | Visit site |
| EcoSolaris | Pantelimon, Romania | Visit site |
| EcoStandard Group | Moscow, Russia | Visit site |
| EcoVadis | Paris, France | Visit site |
| Ecocentro | Mérida, Mexico | Visit site |
| Ecoener | A Coruña, Spain | Visit site |
| Ecoforest | Nigrán, Spain | Visit site |
| Ecoforhouse | Frazão, Portugal | · |
| Ecofy | Mumbai, India | Visit site |
| Ecogreen Energy | Gurugram, India | Visit site |
| Ecogreen Enerji | Denizli, Türkiye | Visit site |
| Ecology Australia Pty Ltd | Melbourne, Australia | Visit site |
| Ecolyte GmbH | Graz, Austria | Visit site |
| Econergy Renewable Energy Ltd. | London, United Kingdom | Visit site |
| Econess Energy | Wuxi Shi, China | · |
| Econetix | Vienna, Austria | Visit site |
| Econvert Water & Energy B.V. | Heerenveen, Netherlands | Visit site |
| Ecoplex Energy | Blanchardstown, Ireland | Visit site |
| Ecopowercell | Alphen aan den Rijn, Netherlands | · |
| Ecoppia | Tel Aviv-Yafo, Israel | · |
| Ecoprogreso. Carreteras y caminos ecológicos y sostenibles. Potabilización solar de agua. | Sant Joan Despí, Spain | Visit site |
| Ecoprogreso. Carreteras y caminos ecológicos y sostenibles. Potabilización solar de agua. | Sant Boi de Llobregat, Spain | Visit site |
| Ecoren Energy | Hyderabad, India | Visit site |
| Ecori Energia Solar | São José do Rio Preto, Brazil | Visit site |
| Ecorus | Eindhoven, Netherlands | Visit site |
| Ecosolar Cantábrico | Gijón, Spain | Visit site |
| Ecosolex | Shenzhen Shi, China | Visit site |
| Ecosolys | Curitiba, Brazil | Visit site |
| Ecospill Ltd | Rotherham, United Kingdom | Visit site |
| Ecotherm | Hartkirchen, Austria | Visit site |
| Edanpower Installations Limited | Coventry, United Kingdom | Visit site |
| Edda Wind | Haugesund, Norway | Visit site |
| Eddy Grid | Utrecht, Netherlands | · |
| Edelsegger Metals | Ybbsitz, Austria | Visit site |
| Edeltec Distribuidora Solar | Princesa Isabel, Brazil | Visit site |
| Eden Geothermal Limited | United Kingdom | Visit site |
| Eden Sustainable Ltd | London, United Kingdom | Visit site |
| Edify Energy | Sydney, Australia | Visit site |
| Edison Next | Milano, Italy | Visit site |
| Edmij | Ouderkerk aan de Amstel, Netherlands | Visit site |
| Edvance | France | Visit site |
| Eelpower Energy | London, United Kingdom | Visit site |
| Eenovance | Shenzhen Shi, China | · |
| Efacec | Leça do Balio, Portugal | Visit site |
| Effekta | Malmö, Sweden | Visit site |
| Efficacy Advisors | Tamworth, Australia | Visit site |
| Effira Energy | Halmstad, Sweden | Visit site |
| Effizienz:Klasse GmbH | Darmstadt, Germany | Visit site |
| Efigen renewable energy | Medellín, Colombia | Visit site |
| Ege Kablo | Yunusemre, Türkiye | Visit site |
| Egret Solar | Xiamen Shi, China | Visit site |
| Eiffage Construction | France | Visit site |
| Eiffage Énergie Systèmes | Vélizy-Villacoublay, France | Visit site |
| Eiffel Investment Group | Paris, France | Visit site |
| Eikto Baterias de Lítio Brasil | Laguna, Brazil | Visit site |
| Eikto Baterias de Lítio Brasil | Xuancheng Shi, China | Visit site |
| Einklang New Energy | Köln, Germany | Visit site |
| Einride | Stockholm, Sweden | Visit site |
| Eiry Energy | Lagos, Nigeria | Visit site |
| Ekona Power | Burnaby, Canada | Visit site |
| Ekotechnik Czech | Praha, Czech Republic | Visit site |
| Ekovoltis | Kielce, Poland | Visit site |
| Eku Energy | London, United Kingdom | · |
| Ekwil | Nanterre, France | Visit site |
| Ekzel AB | Stockholm, Sweden | Visit site |
| Ekzel AB | Linköping, Sweden | Visit site |
| El Seif Engineering Contracting | Sharjah, United Arab Emirates | Visit site |
| El av Sol | Västerås, Sweden | Visit site |
| El-Mor Renewable Energy | Kochav Yair, Israel | · |
| Elbe1 | Renewable Energy Advisors | Hamburg, Germany | Visit site |
| Elcogen | Liivamäe, Estonia | · |
| Elecnor Australia | Melbourne, Australia | Visit site |
| Elecnor Group | Madrid, Spain | Visit site |
| Elecnor do Brasil | Rio de Janeiro, Brazil | Visit site |
| Electraplan | Érd, Hungary | Visit site |
| Electric Vehicle Summit & Awards | Malahide, Ireland | Visit site |
| Electric Vehicle Summit & Awards | Dublin, Ireland | Visit site |
| Electricity Transformation Canada | Toronto, Canada | Visit site |
| Electrify.solar | Ruislip, United Kingdom | Visit site |
| Electrifying Australia | Sydney, Australia | Visit site |
| Electriq Global | Israel | Visit site |
| Electro Energy | Córdoba, Spain | Visit site |
| Electro-Mechanic for Energy (EME) | El Nozha, Egypt | Visit site |
| Electro-Mechanical Company (ELMECO) | Port au Prince, Haiti | · |
| ElectroFleet GmbH | Osnabrück, Germany | Visit site |
| ElectroMechanica | Johannesburg, South Africa | Visit site |
| Electrocycling GmbH | Bad Harzburg, Germany | Visit site |
| Electrolabat S.L | Santa Brígida, Spain | Visit site |
| Electrolux | Stockholm, Sweden | Visit site |
| Electryone AI | London, United Kingdom | Visit site |
| Elegancia Contracting & Industries | لوسيل, Qatar | Visit site |
| Elegrow Technology | Surat, India | Visit site |
| Eleia Energía | Madrid, Spain | Visit site |
| Elektro Imboden AG | Mellingen, Switzerland | Visit site |
| Elektro- Installatiebedrijf Van Lanen | Mill, Netherlands | Visit site |
| Elemental Group | Luxembourg, Luxembourg | Visit site |
| Elementum Energy | Kyiv, Ukraine | · |
| Elen | Mülheim an der Ruhr, Germany | Visit site |
| Elenco Spółka z o.o. | Jędrzejów, Poland | Visit site |
| Elera Renováveis | São Paulo, Brazil | Visit site |
| Elestor B.V. | Arnhem, Netherlands | · |
| Eletricampos Energia Solar Fotovoltaica | Campos dos Goytacazes, Brazil | Visit site |
| EletroBidu Energia Solar | Mogi das Cruzes, Brazil | Visit site |
| Eletroposto Solar Louveira | Louveira, Brazil | Visit site |
| Eletrowatts Engenharia Elétrica | Joinville, Brazil | Visit site |
| Eletrowatts Engenharia Elétrica | Bombinhas, Brazil | Visit site |
| Elettrica Rogeno Srl | Rogeno, Italy | Visit site |
| Elettricità Futura | Roma, Italy | Visit site |
| Elettrograf | San Vito al Tagliamento, Italy | Visit site |
| Elevated Survey Solutions | Brisbane, Australia | Visit site |
| Elevion Energy Solutions GmbH | Berlin, Germany | · |
| Elevion Green | Berlin, Germany | · |
| Elevion Group | Amsterdam, Netherlands | · |
| Elexicon Energy Inc. | Ajax, Canada | Visit site |
| Elfbulbpower | Shenzhen Shi, China | · |
| Elgin | London, United Kingdom | Visit site |
| Elgór + Hansen SA | Chorzów, Poland | Visit site |
| Elicio | Oostende, Belgium | Visit site |
| Elin Türkiye | Yenimahalle, Türkiye | · |
| Elion | Pesaro, Italy | Visit site |
| Elios-Solar Solution | Laval, Canada | · |
| Elipse | Schoten, Belgium | Visit site |
| Elite New Energy | China | · |
| Elite Wind Energy | Antigonish, Canada | · |
| Elize Energie | Grijpskerk, Netherlands | Visit site |
| Elkom Elektrik | Bayraklı, Türkiye | Visit site |
| EllisDon | London, Canada | Visit site |
| Elmark | Warszawa, Poland | Visit site |
| Elmya | Spain | · |
| Elo Renováveis | Boca do Acre, Brazil | Visit site |
| Elpower | Noventa Vicentina, Italy | Visit site |
| Elspec Engineering ltd. | Israel | Visit site |
| Eltechna Paneelbouw BV | Amersfoort, Netherlands | Visit site |
| Eltex | L'Hospitalet de Llobregat, Spain | Visit site |
| Eltrim Kable | Ruszkowo, Poland | Visit site |
| Elum Energy | Paris, France | · |
| Elumija Group | Ingolstadt, Germany | Visit site |
| Eluminate | Herlev, Denmark | Visit site |
| Elvaco AB | Kungsbacka, Sweden | Visit site |
| Elysia Energia Solar | Viamão, Brazil | Visit site |
| Elysia Energia Solar | Porto Alegre, Brazil | Visit site |
| Elysium Solar GmbH | Berlin, Germany | Visit site |
| Elívere Solar | Caspe, Spain | Visit site |
| Emaldo Power | Ølstykke, Denmark | Visit site |
| Embuild Wallonie | Brussels, Belgium | Visit site |
| Emera | Halifax, Canada | Visit site |
| Emerald Green Energy | Solihull, United Kingdom | Visit site |
| Emerald Green Power Ltd | Tiverton, United Kingdom | Visit site |