| Geotek do Brasil | Belo Horizonte, Brazil | Visit site |
| Geovert | Sydney, Australia | Visit site |
| Geowarmth | North Shields, United Kingdom | Visit site |
| Gerchamp | Hangzhou Shi, China | Visit site |
| German Aerospace Center (DLR) | Köln, Germany | Visit site |
| German Energy Solutions Initiative | Hannover, Germany | Visit site |
| German Energy Solutions Initiative of the Federal Ministry for Economic Affairs and Climate Action | Berlin, Germany | Visit site |
| GermanSolar | 楊梅區, Taiwan | Visit site |
| Gerpaas | Maltepe, Türkiye | Visit site |
| GetMy Solutions Pvt Ltd | Pimpri-Chinchwad, India | Visit site |
| Geya Electrical | Wenzhou Shi, China | Visit site |
| Giant Leap | Melbourne, Australia | Visit site |
| Gimv | Antwerpen, Belgium | Visit site |
| Girosun | Saint-Jean-de-Savigny, France | Visit site |
| Giulio Barbieri | Poggio Renatico, Italy | Visit site |
| Giya | Curitiba, Brazil | Visit site |
| Glas Ocean Electric | Halifax, Canada | Visit site |
| Global Incubator Network Austria (GIN) | Vienna, Austria | Visit site |
| Global Partners | Istanbul, Türkiye | Visit site |
| Global Power Generation Australia | Canberra, Australia | Visit site |
| Global Rope Access Inc | West Kelowna, Canada | Visit site |
| Global Tank Group A/S | Ringkøbing, Denmark | Visit site |
| Globo Brasil | Itatiba, Brazil | Visit site |
| Go-Solar by D'Ieteren | Waasmunster, Belgium | Visit site |
| GoBe Consultants Ltd | Buckfastleigh, United Kingdom | Visit site |
| GoShop Energy | Belgium | Visit site |
| Goal Solar | Beaudesert, Australia | Visit site |
| Godoy Córdoba | Barranquilla, Colombia | Visit site |
| Going Solar | Melbourne, Australia | Visit site |
| Gold Hydrogen | Brisbane, Australia | Visit site |
| Gold Standard | Châtelaine, Switzerland | Visit site |
| Golden Group S.p.A. | Argelato, Italy | Visit site |
| Good Future Solar | Zhengzhou Shi, China | Visit site |
| GoodZero | Amsterdam, Netherlands | Visit site |
| Gooree | Shenzhen Shi, China | Visit site |
| Gosmart Lighting Enterprise | Lucena, Philippines | Visit site |
| Gottengreen | Frankfurt am Main, France | Visit site |
| Gouach | Bordeaux, France | Visit site |
| Grace Solar | Flatts, Bermuda | Visit site |
| Graham | Calgary, Canada | Visit site |
| Graphene - The University of Manchester | Manchester, United Kingdom | Visit site |
| Grass2Gas Biofuels | Moga, India | Visit site |
| Gravis Robotics | Zürich, Switzerland | Visit site |
| Great British Energy | Aberdeen, United Kingdom | Visit site |
| Greatario Tanks & Covers | Innerkip, Canada | Visit site |
| Gree Electric Appliances, Inc. of Zhuhai | Qingyuan Shi, China | Visit site |
| Green Angel Syndicate | London, United Kingdom | Visit site |
| Green Career Centre | Toronto, Canada | Visit site |
| Green Cat Renewables Europe | Netherlands | Visit site |
| Green Connect Australia | Adelaide, Australia | Visit site |
| Green Energy M&A GmbH | Vechta, Germany | Visit site |
| Green Energy Park | Morocco | Visit site |
| Green Energy Storage | Breda, Netherlands | Visit site |
| Green Energy Trading | Melbourne, Australia | Visit site |
| Green Essence Lebanon | Lebanon | Visit site |
| Green Gravity | Wollongong, Australia | Visit site |
| Green Hat Consulting, S.L. | Oleiros, Spain | Visit site |
| Green India Renewable Energy | Alappuzha, India | Visit site |
| Green Pulse Energy Limited | Colchester, United Kingdom | Visit site |
| Green Recovery (Leusden en Breda) | Leusden, Netherlands | Visit site |
| Green Rhino® | Ipswich, United Kingdom | Visit site |
| Green Sky Solar | Melbourne, Australia | Visit site |
| Green Tech Valley | Graz, Austria | Visit site |
| Green Twirl Energy Ltd. | Picton, Canada | Visit site |
| Green Wind Renewables | Perth, Australia | Visit site |
| Green-Y Energy AG | Hasle bei Burgdorf, Switzerland | Visit site |
| GreenEdge Capital | Berlin, Germany | Visit site |
| GreenGenUK | Helston, United Kingdom | Visit site |
| GreenHarvest | 臺北市, Taiwan | Visit site |
| GreenHearth | United Kingdom | Visit site |
| GreenPulse | Gent, Belgium | Visit site |
| GreenVolt Energia Solar | Betim, Brazil | Visit site |
| Greenalia S.A. | A Coruña, Spain | Visit site |
| Greenbulb Designs | MEPF Consultant | Ahmedabad, India | Visit site |
| Greenely | Stockholm, Sweden | Visit site |
| Greener4u | Lisse, Netherlands | Visit site |
| Greenopeak GmbH | Nürnberg, Germany | Visit site |
| Greenov | Vannes, France | Visit site |
| Greensun Solar | Hefei Shi, China | Visit site |
| Greenville Energy Ltd | Omagh, United Kingdom | Visit site |
| Grenergy | Madrid, Spain | Visit site |
| Grenevia | Kalety, Poland | Visit site |
| Grengy Photovoltaic | Xiamen Shi, China | Visit site |
| Grensol | Biberist, Switzerland | Visit site |
| Grewfarm | Marche-en-Famenne, Belgium | Visit site |
| Grid Tech | Cooroy, Australia | Visit site |
| Grid Tie Solar | Rio das Ostras, Brazil | Visit site |
| Gridfree Solar Energy Limited | Bhilwara, India | Visit site |
| Gripple Canada | Oakville, Canada | Visit site |
| Gripple Germany | Aßlar, Germany | Visit site |
| Gripple India | New Delhi, India | Visit site |
| Gripple Industrial Ibérica, S.L | Cadrete, Spain | Visit site |
| Gripple Srl | Bergamo, Italy | Visit site |
| Gripple UK & Ireland | Sheffield, United Kingdom | Visit site |
| GroFin | Bambous, Mauritius | Visit site |
| Groenbalans | inzicht - reductie - net zero oplossingen | Utrecht, Netherlands | Visit site |
| Ground Screws Direct | Swindon, United Kingdom | Visit site |
| Groundfix | Christchurch, New Zealand | Visit site |
| Groupe ANGEVIN | Noyal-Châtillon-sur-Seiche, France | Visit site |
| Groupe ETPO | Belmont-de-la-Loire, France | Visit site |
| Groupe Grisoni | Vuadens, Switzerland | Visit site |
| Groupe Hydrocop | Goncelin, France | Visit site |
| Groupe SANERGRID | Lyon, France | Visit site |
| Groupe SORÉGIES | Poitiers, France | Visit site |
| Grow Energy Showroom | Melbourne, Australia | Visit site |
| Grubengold | Bochum, Germany | Visit site |
| Grundon Waste Management | Wallingford, United Kingdom | Visit site |
| Grupo Alonso | València, Spain | Visit site |
| Grupo Casais | Mire de Tibães, Portugal | Visit site |
| Grupo Dragón | Mexico City, Mexico | Visit site |
| Grupo Energisa | Uberlândia, Brazil | Visit site |
| Grupo Exiom | Oviedo, Spain | Visit site |
| Grupo Lantania | Madrid, Spain | Visit site |
| Grupo Ortiz | Madrid, Spain | Visit site |
| Grupo SADA | Betim, Brazil | Visit site |
| Grupo Tatoma | Monzón, Spain | Visit site |
| Gryd Energy | London, United Kingdom | Visit site |
| Grün leben GmbH | Stuttgart, Germany | Visit site |
| Guangdong Cable Factory | Fuoshan Shi, China | Visit site |
| GuarantCo | London, United Kingdom | Visit site |
| Gulf Development Public Company Limited | Bangkok, Thailand | Visit site |
| Gussing Renewable Energy Asia | Bangkok, Thailand | Visit site |
| GÉMATI | Paris, France | Visit site |
| Gás da Terra | Lisboa, Portugal | Visit site |
| Güssing Renewable Energy | Güssing, Austria | Visit site |
| H & N Energien GmbH | Bickenbach, Germany | Visit site |
| H&MV Engineering | Limerick, Ireland | Visit site |
| H2CHP Limited | London, United Kingdom | Visit site |
| H2D drilling solutions | Lummen, Belgium | Visit site |
| H2Gremm | Edern, France | Visit site |
| HAHN Automation Group | Rheinböllen, Germany | Visit site |
| HARTING Technologiegruppe | Espelkamp, Germany | Visit site |
| HBK Contracting Company W.L.L | Doha, Qatar | Visit site |
| HBOWA | Suzhou Shi, China | Visit site |
| HCC Engenharia Elétrica | Ibirubá, Brazil | Visit site |
| HCFA Global | Quzhou Shi, China | Visit site |
| HDA GRUP | Ümraniye, Türkiye | Visit site |
| HDF Energy | Blanquefort, France | Visit site |
| HDF LATAM | France | Visit site |
| HEGEMANN-REINERS GRUPPE | Bremen, Germany | Visit site |
| HELIOCLIM | Cannes, France | Visit site |
| HELIOS RES SA | Greece | Visit site |
| HERMOS | Mistelgau, Germany | Visit site |
| HERO.aero | Salzburg, Austria | Visit site |
| HIJAU | Jakarta, Indonesia | Visit site |
| HISA INGENIERIE | Saint-Romain-de-Colbosc, France | Visit site |
| HMV Engenharia e Consultoria Ltda | Porto Alegre, Brazil | Visit site |
| HOCHTIEF | Essen, Germany | Visit site |
| HOOPP (Healthcare of Ontario Pension Plan) | London, Canada | Visit site |
| HORIBA MIRA | Basildon, United Kingdom | Visit site |