| H & N Energien GmbH | Bickenbach, Hesse | Visit site |
| H Cycle, LLC | Mountain View, California | Visit site |
| H&H Electrical Services | San Juan, San Juan | Visit site |
| H&MV Engineering | Limerick, Limerick | Visit site |
| H&Y Associates Inc. | Iselin, New Jersey | · |
| H2CHP Limited | London, England | Visit site |
| H2D drilling solutions | Lummen, Limburg | Visit site |
| H2Gremm | Edern, Finistère | Visit site |
| HAHN Automation Group | Rheinböllen, Rhineland-Palatinate | Visit site |
| HARTING Technologiegruppe | Espelkamp, North Rhine-Westphalia | Visit site |
| HARTING Technology Group | Espelkamp, North Rhine-Westphalia | Visit site |
| HASI | Annapolis, Maryland | Visit site |
| HBK Contracting Company W.L.L | Doha, Doha | Visit site |
| HBOWA | Suzhou Shi, Jiangsu | Visit site |
| HCC Engenharia Elétrica | Rio Grande, Rio Grande do Sul | Visit site |
| HCFA Global | Quzhou Shi, Zhejiang | Visit site |
| HCSS | Sugar Land, Texas | Visit site |
| HD Hyundai Energy Solutions America | Seongnam-si, Gyeonggi-do | Visit site |
| HD Roofing & Solar | Longwood, Florida | Visit site |
| HDA GRUP | Ümraniye, Istanbul | Visit site |
| HDF Energy | Blanquefort, Gironde | Visit site |
| HDF LATAM | · | Visit site |
| HDG Technik | Moos, Bavaria | Visit site |
| HED | Royal Oak, Michigan | Visit site |
| HEGEMANN-REINERS GRUPPE | Bremen, Bremen | Visit site |
| HEI | Honolulu, Hawaii | Visit site |
| HELIOCLIM | Cannes, Alpes-Maritimes | Visit site |
| HELIOS RES SA | Attica | Visit site |
| HENRY ADAMS, LLC | Baltimore, Maryland | Visit site |
| HENSEL PHELPS | Greeley, Colorado | Visit site |
| HERMOS | Mistelgau, Bavaria | Visit site |
| HERO.aero | Salzburg, Salzburg | Visit site |
| HEYCO® Products Corp. | Toms River, New Jersey | Visit site |
| HICO America | Pittsburgh, PA | Visit site |
| HIJAU | Jakarta, Jakarta | Visit site |
| HIPP Design + Consulting | Raleigh, North Carolina | Visit site |
| HISA INGENIERIE | Saint-Romain-de-Colbosc, Seine-Maritime | Visit site |
| HITT Contracting Inc. | Falls Church, Virginia | Visit site |
| HMV Engenharia e Consultoria Ltda | Porto Alegre, Rio Grande do Sul | Visit site |
| HOCHTIEF | Essen, North Rhine-Westphalia | Visit site |
| HOOPP (Healthcare of Ontario Pension Plan) | Toronto, Ontario | Visit site |
| HORIBA MIRA | Rugby, England | Visit site |
| HOTSTART | Spokane, Washington | Visit site |
| HOYETEK 合研科技 | 臺北市, Taipei | Visit site |
| HPC Utility Scale Foundations | · | Visit site |
| HPS Investment Partners, LLC | New York, New York | Visit site |
| HR Energy | Kaunas, Kaunas | Visit site |
| HRD Corp - Human Resource Development Corporation | Kuala Lumpur, Kuala Lumpur | Visit site |
| HS Orka | Grindavík, Southern Peninsula Region | Visit site |
| HSEA- Hybrid Solar Energy Australia | Sydney, New South Wales | Visit site |
| HSH-Installateur | Bloemfontein, Free State | Visit site |
| HT Instruments | Faenza, Ravenna | Visit site |
| HUAXIAVENT - Huaxia New Energy Limited | Zhongshan Shi, Guangdong | Visit site |
| HUNAN FENGRI POWER & ELECTRIC CO., LTD | Hunan | Visit site |
| HUYU | Wenzhou Shi, Zhejiang | Visit site |
| HVTI PRIVATE LIMITED | Gurugram, Haryana | Visit site |
| HW Power Inc. | Norwalk, California | Visit site |
| HYCCO | Toulouse, Haute-Garonne | Visit site |
| HYDRO Exploitation SA | Sion, Valais | Visit site |
| HYDRONNOV | Caluire-et-Cuire, Rhône | Visit site |
| HYDS - Hydrogen Solutions | Stord, Vestland | Visit site |
| HYNOLOGY | Auvergne-Rhône-Alpes | Visit site |
| HYPSET | Rendsburg, Schleswig-Holstein | Visit site |
| HYSETCO | Île-de-France | Visit site |
| Habitec Eco Energy | Yucatán | Visit site |
| Hach | Loveland, Colorado | Visit site |
| Hager | Blieskastel, Saarland | Visit site |
| Haian Huijue Network Communication Equipment Co., Ltd | Nantong, Jiangsu Province | Visit site |
| Haidi Energy Group | Shandong | Visit site |
| Hailei New Energy | Shenzhen Shi, Guangdong | Visit site |
| Haina Solar | Jiaxing Shi, Zhejiang | Visit site |
| HalloStroom | Gouda, South Holland | Visit site |
| Halo Land Management | Canton, Ohio | Visit site |
| Hammond Power Solutions | Guelph, Ontario | Visit site |
| Hampton Tedder Electric | Montclair, California | Visit site |
| Hanchu ESS | Wuxi Shi, Jiangsu | Visit site |
| Hangzhou First Applied Material Co Ltd | Hangzhou | Visit site |
| Hangzhou Junchi New Energy Technology Co., Ltd | Hangzhou | Visit site |
| Hangzhou Lanran Technology | Hangzhou Shi, Zhejiang | Visit site |
| Hangzhou Sino-Deutsch Power Transmission Equipment Co., Ltd | Hangzhou | Visit site |
| Hans Sommer GmbH | Wasen im Emmental, Bern | Visit site |
| Hansen Yuncken | Melbourne, Victoria | Visit site |
| HaoSolar | Singapore, Central Singapore Community Development Council | Visit site |
| HappyVolts | Redwood City, California | Visit site |
| HardHat Workforce Solutions | Atlanta, Georgia | Visit site |
| Hargassner North America | Toronto, Ontario | Visit site |
| Harold Brothers Mechanical Contractors, Inc. | Weymouth, Massachusetts | Visit site |
| Harry Grodsky & Co., Inc. | Springfield, Massachusetts | Visit site |
| Hassan Allam Holding | Cairo, Cairo | Visit site |
| Hausmann | Lincoln, Nebraska | Visit site |
| Haustechnik Hardegen GmbH | Hanau, Hesse | Visit site |
| Havila Biogass | Fosnavåg, Møre og Romsdal | Visit site |
| Hawaiian Dredging Construction Company | Honolulu, Hawaii | Visit site |
| Hazard Dynamics | Austin, Texas | Visit site |
| Heat Pump Installers UK | Huddersfield, England | Visit site |
| Heatload | Chichester, England | Visit site |
| Heaven Designs Pvt Ltd | Surat, Gujarat | Visit site |
| Heckel Vegetation Management | Amarillo, Texas | Visit site |
| Hefaistos Global SA | Trikala, Thessaly | Visit site |
| Hegel System Technische Sdn Bhd - MEP & Facility Maintenance Specialist | Subang Jaya, Selangor | Visit site |
| Heilind Electronics | · | Visit site |
| Heirloom | Castro Valley, California | Visit site |
| Heliartec Solutions Corporation, Ltd. (Taiwan) | 竹北市, Hsinchu County | Visit site |
| Helical Fusion | 東京都, Tokyo Prefecture | Visit site |
| Helicor, LLC | Weatherford, Oklahoma | Visit site |
| Helio Connect GmbH | Hamburg, Hamburg | Visit site |
| Heliomex | León, Guanajuato | Visit site |
| Helios New Energy Co., Ltd | Shenzhen Shi, Guangdong | Visit site |
| HeliosAltas™ | Anna, Texas | Visit site |
| HeliosLite | Le Bourget-du-Lac, Savoie | Visit site |
| Heliup | Le Bourget-du-Lac, Savoie | Visit site |
| Helix Electric | San Diego, California | Visit site |
| HellermannTyton North America | Milwaukee, Wisconsin | Visit site |
| Helmholtz-Gemeinschaft / Helmholtz Association | Berlin, Berlin | Visit site |
| Helmholtz-Institut Erlangen-Nürnberg für Erneuerbare Energien | Erlangen, Bavaria | Visit site |
| Helukabel | Hemmingen, Baden-Württemberg | Visit site |
| Henderson Building Solutions | Lenexa, Kansas | Visit site |
| Hengfengtai Precision Machinery Co., Ltd | 温州, 浙江省 | Visit site |
| Hengxing Solar | Xuzhou Shi, Jiangsu | Visit site |
| Hennepin County | Minneapolis, Minnesota | Visit site |
| Herc Rentals | Bonita Springs, Florida | Visit site |
| Hertz Pano | Yenimahalle, Ankara | Visit site |
| Hevins Engineering | Vadodara, Gujarat | Visit site |
| Hexagon Technology | Ahmedabad, Gujarat | Visit site |
| Hexicon | Stockholm, Stockholm | Visit site |
| Hexis Científica | Jundiaí, São Paulo | Visit site |
| Hey Solar | North York, Ontario | Visit site |
| Heygaz Biomethane, S.L. | Madrid, Madrid | Visit site |
| HiTHIUM Energy Storage | Xiamen Shi, Fujian | Visit site |
| HiTeAM Systems | Delft, South Holland | Visit site |
| Hiconics | Beijing, Beijing | Visit site |
| Hicorenergy | Tieling Shi, Liaoning | Visit site |
| Higeco Energy S.R.L. | Startup innovativa | Val di Zoldo, Belluno | Visit site |
| Higeco More | Assago, Milan | Visit site |
| High Ground Energy | Burleson, Texas | Visit site |
| High To Low Voltage | Commerce City, CO | Visit site |
| High Voltage Inc. | Vernal, Utah | Visit site |
| Hiko Technical Services LLC | Arima, Arima | Visit site |
| Hill International, Inc. | Wayne, New Jersey | Visit site |
| Hilltop Concrete | Flint, Texas | Visit site |
| Himalayan Solar | Panchkula, Haryana | Visit site |
| Himin Solar | Shandong | Visit site |
| Himzen | Xiamen Shi, Fujian | Visit site |
| Hinduja Tech Limited | Chennai, Tamil Nadu | Visit site |
| Hinduja Tech Mexico | Monterrey, Nuevo León | Visit site |
| Hindustan Power | New Delhi, Delhi | Visit site |
| Hirundo Energy | Saint-Gilles, Brussels-Capital | Visit site |
| Hisense Group | Qingdao Shi, Shandong | Visit site |
| Hispania Silva | València, Valencia | Visit site |
| Hispanics in Energy | Sacramento, California | Visit site |