| RedoxNRG | Narva, Estonia | Visit site |
| Reefy | Delft, Netherlands | Visit site |
| Regascold | Aachen, Germany | Visit site |
| Regen Power Pty Ltd | Adelaide, Australia | Visit site |
| RegenX | Melbourne, Australia | Visit site |
| Regiolux International | Gangkofen, Germany | Visit site |
| Regiolux Nederland B.V. | Woerden, Netherlands | Visit site |
| Reiling Group | Harsewinkel, Germany | Visit site |
| Reinhard Haustechnik AG | Sarnen, Switzerland | Visit site |
| Rekart Innovations Private Limited | Gurugram, India | Visit site |
| Reliance Energy | Lahore, Pakistan | Visit site |
| Reliance Industries Limited | Navi Mumbai, India | Visit site |
| Reliance Power Limited | India | Visit site |
| Reliance Renewable Energy Pvt Ltd | Kathmandu, Nepal | Visit site |
| Relode | London, United Kingdom | Visit site |
| Rely | Brussels, Belgium | Visit site |
| Rematter | Zug, Switzerland | Visit site |
| Remedium | Cambridge, United Kingdom | Visit site |
| Remora Technology | Gebze, Türkiye | Visit site |
| Renaissance Fusion | Saint-Priest, France | Visit site |
| Renasci Oostende | Oostende, Belgium | Visit site |
| Renco | Pesaro, Italy | Visit site |
| Renerix Solar | Ciudad Real, Spain | Visit site |
| Renesas Electronics | 東京都, Japan | Visit site |
| Renesource Inc. | Manila, Philippines | Visit site |
| Renevolt | Ål, Norway | Visit site |
| Renewable Energy Society Australia | Melbourne, Australia | Visit site |
| Renewable Energy Society of India (RESI) | New Delhi, India | Visit site |
| Renewable Field Services Blade Repair & GWO's | Lydbury North, United Kingdom | Visit site |
| RenewableWorks | · | Visit site |
| Renewo | Milano, Italy | Visit site |
| Reno Energy | Liège, Belgium | Visit site |
| Renotec NV | Brussels, Belgium | Visit site |
| Renovables Palau | Palau-solità i Plegamans, Spain | Visit site |
| Renovit | Milano, Italy | Visit site |
| Renpower | Casablanca, Morocco | Visit site |
| Rentel NV | Deal, Belgium | Visit site |
| Renwasol Renewable Energy & Water Solutions | Kabwe, Zambia | Visit site |
| Reolum | Madrid, Spain | Visit site |
| Reparar Works | Mumbai, India | Visit site |
| Resalta | Ljubljana, Slovenia | Visit site |
| Resolve Energia Solar | Belém, Brazil | Visit site |
| Revalue Energies | Milano, Italy | Visit site |
| Revfin | New Delhi, India | Visit site |
| Revo Energia | São Paulo, Brazil | Visit site |
| Reykjavik Geothermal | Iceland | Visit site |
| Rhofa Energy | Çerkezköy, Turkey | Visit site |
| Ricardo | London, United Kingdom | Visit site |
| Richard Crookes Constructions | Sydney, Australia | Visit site |
| Richmond Renewables Yorkshire Ltd | Richmond, United Kingdom | Visit site |
| Riesco y Asociados | El Trébol, Argentina | Visit site |
| Rikur Energy Inc. | Burnaby, Canada | Visit site |
| Rinascita Holding | Roma, Italy | Visit site |
| Risin Energy | Beijing, China | Visit site |
| Ritar Power | Shenzhen Shi, China | Visit site |
| Rittmeyer Group | Baar, Switzerland | Visit site |
| Riverside Automation Ltd. | Sheffield, United Kingdom | Visit site |
| Riwatt Solar Co.,Limited | Jiaxing Shi, China | Visit site |
| RoMiotto Indústria e Comércio de Instrumentos de Medição Ltda | São Paulo, Brazil | Visit site |
| RoadSmart | Shenzhen Shi, China | Visit site |
| Robert Bird Group | Brisbane, Australia | Visit site |
| RobotPlusPlus | Huanggang Shi, China | Visit site |
| Robotnik Automation | Paterna, Singapore | Visit site |
| Rocky Point Engineering Ltd. | Canada | Visit site |
| Rodigas | Limena, Italy | Visit site |
| Rokas Renewables (Iberdrola Renovables) | Melbourne, Australia | Visit site |
| Roland Berger | München, Germany | Visit site |
| Roll Group | Capelle aan den IJssel, Netherlands | Visit site |
| Romagnole | Mandaguari, Brazil | Visit site |
| Rongma New Energy | Wuxi Shi, China | Visit site |
| Rongstar Energy GmbH | Aldenhoven, Germany | Visit site |
| Rongstar Energy Polska | Aldenhoven, Germany | Visit site |
| Roodenburg Groep | Krimpen aan den IJssel, Netherlands | Visit site |
| Rope Access Sverige AB | Solna, Sweden | Visit site |
| Rosen Solar | Hefei Shi, China | Visit site |
| Rothschild & Co | Penzlin, Germany | Visit site |
| Rubicon | Blouberg, South Africa | Visit site |
| Ruitian Cable | Hengshui Shi, China | Visit site |
| Rux Energy | Sydney, Australia | Visit site |
| Ruya Energy | Yemen | Visit site |
| Rystad Energy | Oslo, Norway | Visit site |
| RÖNESANS HOLDİNG | Ankara, Türkiye | Visit site |
| Rönesans Enerji | Ankara, Türkiye | Visit site |
| S&G Solar Ltd. | Струма, Bulgaria | Visit site |
| S'Tile | Poitiers, France | Visit site |
| S.B. Prefabbricati srl | Italy | Visit site |
| S.C New Energy Technology Corporation | Shenzhen Shi, China | Visit site |
| S2S Environmental Inc. | Pickering, Canada | Visit site |
| SALD BV | Eindhoven, Netherlands | Visit site |
| SALZSTROM | Vienna, Austria | Visit site |
| SAO-Energy | Abuja Municipal, Nigeria | Visit site |
| SAT Group of Companies | Chatham, Canada | Visit site |
| SATA Consultant PLC | Addis Ababa, Ethiopia | Visit site |
| SATEL | Zaragoza, Spain | Visit site |
| SATER-SOLAR | France | Visit site |
| SAVER | Izegem, Belgium | Visit site |
| SB Wind Energy | Chennai, India | Visit site |
| SBB ENERGY S.A. | Opole, Poland | Visit site |
| SCHULZ Systemtechnik | Visbek, Germany | Visit site |
| SCS Manufacturing Inc. | Nanaimo, Canada | Visit site |
| SDM-Projects | Overijse, Belgium | Visit site |
| SEAM Spatial | Brisbane, Australia | Visit site |
| SEG Solarenergie Guben Management GmbH | Guben, Germany | Visit site |
| SEM | Canada | Visit site |
| SER Renováveis | Salvador, Brazil | Visit site |
| SERCOO ENERGY GmbH | Bremerhaven, Germany | Visit site |
| SERENGEO SRL | Pianoro, Italy | Visit site |
| SERGIES | Poitiers, France | Visit site |
| SERHY | Saint-Amans-Soult, France | Visit site |
| SEW-EURODRIVE Turkey | Gebze, Türkiye | Visit site |
| SEYSES | Sevilla, Spain | Visit site |
| SFA Electric | Sincan, Türkiye | Visit site |
| SFI Australia | Ballarat, Australia | Visit site |
| SFP Group | Farmsum, Netherlands | Visit site |
| SG Wholesale | Adelaide, Australia | Visit site |
| SHEM Société Hydro-Electrique du Midi | Sainte-Croix-en-Plaine, France | Visit site |
| SHIFT2DC | Unhos, Portugal | Visit site |
| SHV Energy China | Guangzhou Shi, China | Visit site |
| SIDERA | Innovative Energy | Mérida, Mexico | Visit site |
| SIEL | Trezzano Rosa, Italy | Visit site |
| SILOSUN | Marseille, France | Visit site |
| SINN Power | Gauting, Germany | Visit site |
| SIVentures (prev. Smart Infrastructure Ventures) | Leipzig, Germany | Visit site |
| SJ Group | Singapore | Visit site |
| SKC Renewable Services | Cumnock, United Kingdom | Visit site |
| SLB Capturi | Lysaker, Norway | Visit site |
| SLRB • BGHM | Saint-Gilles, Belgium | Visit site |
| SMA Italia | Italy | Visit site |
| SMART BLADE GmbH | Ravensburg, Germany | Visit site |
| SMART Photonics | Eindhoven, Netherlands | Visit site |
| SOCOTEC | Guyancourt, France | Visit site |
| SOFAR | Shenzhen Shi, China | Visit site |
| SOFRESID ENGINEERING | Saint-Herblain, France | Visit site |
| SOGE Cambodia | Phnom Penh, Cambodia | Visit site |
| SOLAIRIUS | Casablanca, Morocco | Visit site |
| SOLAR GLOBAL a.s. | Napajedla, Czech Republic | Visit site |
| SOLAR RELAX - GES TAKİP | Kayseri, Türkiye | Visit site |
| SOLAREN RENEWABLE ENERGY SOLUTIONS CORPORATION | La Paz, Philippines | Visit site |
| SOLAREX | Mortsel, Belgium | Visit site |
| SOLARVIA | Nanterre, France | Visit site |
| SOLENVER Soluciones energéticas | Sudanell, Spain | Visit site |
| SOLEX Energy Technologies | Kartal, Türkiye | Visit site |
| SOLIPORT | Solar carports | EV chargers | BESS | PV | Vilniaus, Lithuania | Visit site |
| SOLTECH NV | Genk, Belgium | Visit site |
| SOLV4EX Group of Companies | Calgary, Canada | Visit site |
| SOMODO GmbH | Münster, Germany | Visit site |
| SOWITEC Brasil | Salvador, Brazil | Visit site |
| SP Rooftop Corporation | Makati, Philippines | Visit site |
| SPG | Woluwe-Saint-Lambert, Belgium | Visit site |
| SPIE Nederland | Breda, Netherlands | Visit site |