| ARAN ENERJİ | Yenimahalle, Türkiye | Visit site |
| ARAXÁ ENGENHARIA | Florianópolis, Brazil | Visit site |
| ARB WIND | Burntisland, United Kingdom | Visit site |
| ARC Ride | London, United Kingdom | Visit site |
| ARCH | Sydney, Australia | Visit site |
| AREC Centre-Val de Loire | Saint-Pierre, France | Visit site |
| AREP | Paris, France | Visit site |
| ARGENTINA MMO Environmental Services | Mar del Plata, Argentina | Visit site |
| ARM Power | Cambridge, United Kingdom | Visit site |
| ARTS Energy | Le Mans, France | · |
| ARU - Ingenieure, Architekten und Sachverständige | Lingen, Germany | Visit site |
| AS Graanul Invest | Tallinn, Estonia | Visit site |
| ASE Renovables, SL | Ingenio, Spain | Visit site |
| ASE Structure Design Pvt Limited | Chennai, India | Visit site |
| ASE Structure Design Pvt Limited | Sydney, Australia | Visit site |
| ASG Energie AG | Köthen, Germany | Visit site |
| ASG EnergieInvest GmbH | Köthen, Germany | Visit site |
| ASIT-SOLAR | Málaga, Spain | Visit site |
| ASJA ENERGY | Rivoli, Italy | Visit site |
| ASM Technologies Ltd | Bengaluru, India | Visit site |
| ASOCIACIÓN de INSTALADORES de ALMERÍA | Benitagla, Spain | Visit site |
| ASOCIACIÓN de INSTALADORES de ALMERÍA | Almería, Spain | Visit site |
| ASOT Solar | Surat, India | Visit site |
| ASPOWER | Ümraniye, Türkiye | Visit site |
| ASTOR - Technology meets People | Kraków, Poland | Visit site |
| ASTRALIA SOLAR | Móstoles, Spain | Visit site |
| ASTRALIA SOLAR | Dos Hermanas, Spain | Visit site |
| ASTRALIA SOLAR | Barcelona, Spain | Visit site |
| ASTRALIA SOLAR | Budapest, Hungary | Visit site |
| ASUNIM Solar Energy Systems Contracting LLC | Dubai, United Arab Emirates | Visit site |
| ATESS Power | Shenzhen Shi, China | Visit site |
| ATI-Solar B.V. | IJsselmuiden, Netherlands | Visit site |
| ATJ SOLUTIONS Inc. - (12224895 Canada Inc) | Nepean, Canada | Visit site |
| ATLANT 3D | Taastrup, Denmark | Visit site |
| ATOBA energy | Lyon, France | Visit site |
| ATS Corporation | Cambridge, Canada | Visit site |
| AUCTUS Capital Partners AG | München, Germany | Visit site |
| AUKEY | Shenzhen Shi, China | Visit site |
| AUXOLAR GmbH | Berlin, Germany | Visit site |
| AUXSOL | Ningbo Shi, China | · |
| AVAESEN | València, Spain | Visit site |
| AVANCIS GmbH | Torgau, Germany | Visit site |
| AVANTAG Energy | Wecker, Luxembourg | Visit site |
| AVENIR ENERGIE | Boksburg, South Africa | Visit site |
| AVENSTON | Kyiv, Ukraine | · |
| AVIA SOLAR | Warszawa, Poland | Visit site |
| AVIA VOLT Suisse AG | Frauenfeld, Switzerland | Visit site |
| AVID Solar | Auckland, New Zealand | Visit site |
| AVL Fuel Cell Canada Inc. | Burnaby, Canada | Visit site |
| AVO Energy | Islampur, India | Visit site |
| AVO Energy | Bengaluru, India | Visit site |
| AVO Energy | Mumbai, India | Visit site |
| AVO Energy | New Delhi, India | Visit site |
| AVO verdelerbouw | Someren, Netherlands | Visit site |
| AVOB | Boulogne-Billancourt, France | Visit site |
| AW-Energy Oy - "Plug into wave energy" | Vantaa, Finland | Visit site |
| AWS Ocean Energy Ltd | Inverness, United Kingdom | Visit site |
| AWSS Renewable Energy Pvt. Ltd. | Chennai, India | Visit site |
| AWSS Renewable Energy Pvt. Ltd. | Storå, Norway | Visit site |
| AXIAN Group | Antananarivo, Madagascar | Visit site |
| AXSOL | Würzburg, Germany | Visit site |
| AYA Energia | São Paulo, Brazil | Visit site |
| AYK Energy Ltd. | Andorra la Vella, Andorra | Visit site |
| AZ PROJET | Bex, Switzerland | Visit site |
| AZCATEC Tecnología e Ingeniería | Dos Hermanas, Spain | Visit site |
| AZGroupPR | Carolina, Puerto Rico | Visit site |
| AZOLIS | Mannheim, Germany | · |
| AZUL Y VERDE ENERGÍA Y SOSTENIBILIDAD | Córdoba, Spain | Visit site |
| AZUL Y VERDE ENERGÍA Y SOSTENIBILIDAD | Málaga, Spain | Visit site |
| AZUR ISOLATION INDUSTRIELLE | Saint-Laurent-du-Var, France | Visit site |
| Aadhavan Green Energy Solution - India | Tiruchirappalli, India | Visit site |
| Aalberts hydronic flow control | Almere, Netherlands | Visit site |
| Aalborg CSP A/S | Aalborg, Denmark | Visit site |
| Aalborg Energie Technik a/s | Aalborg, Denmark | Visit site |
| Aalborg Energie Technik a/s | Kraków, Poland | Visit site |
| Aasan Group of Companies | Köln, Germany | Visit site |
| Aatral ESP | Chennai, India | Visit site |
| Abasol | Spain | Visit site |
| Aberdeen & Grampian Chamber of Commerce | Aberdeen, United Kingdom | Visit site |
| Aberdeen Renewable Energy Group (AREG) | Aberdeen, United Kingdom | Visit site |
| Ablerex Electronics | 新店區, Taiwan | · |
| Aboitiz Renewables | Tiwi, Philippines | Visit site |
| Aboitiz Renewables | Calauan, Philippines | Visit site |
| Absen Energy | Shenzhen Shi, China | Visit site |
| Absolicon Solar Collector AB | Härnösand, Sweden | · |
| Absolute Clean Energy Public Company Limited | Bangkok, Thailand | Visit site |
| Absorption Chiller Service, Bangladesh | Dhaka, Bangladesh | Visit site |
| Abu Dhabi Investment Authority (ADIA) | Abu Dhabi, United Arab Emirates | Visit site |
| Abundance Investment | London, United Kingdom | Visit site |
| Acacia | Marseille, France | Visit site |
| Accenture España | Madrid, Spain | Visit site |
| Access International - Expedited Permit Designs | Engineering | Proposals | PE Stamping Solutions | New Delhi, India | · |
| Accra Compost and Recycling Plant Limited | Ghana | Visit site |
| Accuracy | Paris, France | Visit site |
| Acecore | Uden, Netherlands | Visit site |
| Actemium | Nanterre, France | Visit site |
| Actis | London, United Kingdom | Visit site |
| Activ'Glass | Wilen bei Wollerau, Switzerland | Visit site |
| Activ8 Solar Energies | Carrickmacross, Ireland | · |
| Activa Environnement inc. | New Richmond, Canada | Visit site |
| Acumuladores Moura | Belo Jardim, Brazil | · |
| Adamietz Sp. z o.o. | Strzelce Opolskie, Poland | Visit site |
| Adani Wind | Gandhinagar, India | Visit site |
| Adaptive Balancing Power GmbH | Pfungstadt, Germany | Visit site |
| Adayo | China | Visit site |
| Adele Hydrogen | Lyon, France | · |
| Ademotec | Großbeeren, Germany | Visit site |
| Aden Solar Enerji | Kuşadası, Türkiye | Visit site |
| Aditya Green Energy Private Limited | Latur, India | Visit site |
| Adolf Thies GmbH & Co. KG - Thies Clima | Göttingen, Germany | · |
| Adrem Asset Management | Bucharest, Romania | Visit site |
| Ads-tec | Nürtingen, Germany | · |
| Advait Energy Transitions Limited | Ahmedabad, India | Visit site |
| AdvanSol | 臺北市, Taiwan | Visit site |
| Advanced Blade Repair Services (Global) | Sunderland, United Kingdom | Visit site |
| Advanced Blade Repair Services (Global) | Rayleigh, United Kingdom | Visit site |
| Advanced Microgrid Solutions (AMS) | Singapore, Singapore | Visit site |
| Advanced United Systems-AUS | Al-Riyadh, Saudi Arabia | Visit site |
| Adven – The leading partner in the energy transition | Vantaa, Finland | Visit site |
| Advent Technologies A/S | Aalborg, Denmark | Visit site |
| Adwog Solaris™ | Bengaluru, India | Visit site |
| Adyasolar | Indonesia | Visit site |
| Aed Energy | London, United Kingdom | Visit site |
| Aegeus Technologies Ltd | Bengaluru, India | · |
| Aegeus Technologies Private Limited | Bengaluru, India | Visit site |
| Aegis Automation India Pvt. Ltd. | Secunderabad, India | Visit site |
| Aegis Critical Energy Defence Corp. | Vancouver, Canada | Visit site |
| Aegis Energy | Westgate-on-Sea, United Kingdom | · |
| Aegis Renewable Tech Solutions Pvt. Ltd. | India | · |
| Aemifesa - Aemifesa Formació | Badalona, Spain | Visit site |
| Aequisol GmbH | Halstenbek, Germany | Visit site |
| Aer Soléir | Dublin, Ireland | · |
| Aerem | Mumbai, India | · |
| Aerial PV Inspection GmbH | Aachen, Germany | Visit site |
| Aerisoul | Šahy, Slovakia | Visit site |
| Aerometrex | Adelaide, Australia | Visit site |
| Aerones | Riga, Latvia | Visit site |
| Aertssen Machinery Services | Abu Dhabi, United Arab Emirates | Visit site |
| Aether Engineering | Thessaloniki, Greece | Visit site |
| Afore New Energy | Shanghai, China | Visit site |
| Africa Finance Corporation | Lagos, Nigeria | Visit site |
| Africa GreenTec | Frankfurt am Main, Germany | Visit site |
| Africa Minigrid Developers Association (AMDA) | Nairobi, Kenya | Visit site |
| Africa Resilience Investment Accelerator (ARIA) | London, United Kingdom | Visit site |
| AfricaNEV | Accra, Ghana | Visit site |
| African Clean Energy Developments (ACED) | Cape Town, South Africa | Visit site |
| African Energy | Bexhill-on-Sea, United Kingdom | Visit site |
| African Energy | Hastings, United Kingdom | Visit site |
| African Infrastructure Investment Managers (AIIM) | Cape Town, South Africa | Visit site |
| African Sun Energy | Botswana | Visit site |