| ABB AG | Germany |
| ABB S.A. | Spain |
| ABO Wind AG | Germany |
| Actensys | Germany |
| Advantec Europe Sas | France / Japan |
| AEE Renewables plc | UK |
| Afterfit K.K. | Japan |
| Akuo Energy | France |
| ALPINE-ENERGIE Deutschland GmbH | Germany |
| Amatec GmbH | Germany |
| AMEC Kamtech Inc. | USA |
| Ameresco Inc. | USA |
| AMP Solar Group Inc. | Canada |
| AquaSoli GmbH & CO. KG | Germany |
| ArcTech | Germany |
| BayWa r.e. renewable energy GmbH | Germany |
| BEC SOLAR GmbH | Germany |
| Beijing RETEC New Energy Technology Co. | China |
| BELECTRIC Trading GmbH | Germany |
| Birdseye Renewable Energy LLC | USA |
| Black & Veatch | USA |
| Blue Oak Energy | USA |
| Booth & Associates | USA |
| Borrego Solar Systems, Inc. | USA |
| BORUSAN ENBW ENERJI | Turkey |
| Bouygues Energie & Services | France |
| British Solar Renewables | UK |
| c2energy GmbH | Germany |
| Canadian Solar Solutions Inc. | Canada |
| CJR Solar | Portugal |
| Clenergy Global Projects GmbH | Germany |
| Companie Nationale du Rhone | France |
| Conergy Asia & ME PTE LTD | Singapur |
| Conergy Japan | Japan |
| Consulting Engineers Group Inc. | USA |
| CPIPEC | China |
| Cypress Creek | USA |
| Downer Group | Australia |
| DP Energy Australia Pty. Ltd | Australia |
| EDF ENERGIES NOUVELLES | France |
| EDP Renewables | Spain |
| EDP Renewables | USA |
| eeas Andy Stüwe | Germany |
| EEPro GmbH | Germany |
| efacec Engenharia e Sistemas, S.A. | Portugal |
| ELSE Enerji | Turkey |
| Empresa de Energia del Pacifico | Columbia |
| EnBW Erneuerbare Energien GmbH | Germany |
| ENEL Green Power | Italy |
| Energiekontor AG | Germany |
| ENERGISTO | Germany |
| Enermat Renewables | Spain |
| Enerparc AG | Germany |
| Enerparc Inc. | USA |
| ENGIE Green | France |
| ERS Energy Sdn Bhd | Malaysia? |
| Ethical Power | UK |
| European Energy A/S | Denmark |
| Fichtner | Germany |
| Friedrich Montagen | Germany |
| Gildemeister energy solution GmbH | Germany |
| Goldbeck Solar GmbH | Germany |
| GP Joule GmbH? | Germany |
| GPSS Holding Co. Ltd. | Japan |
| Gräss Engineering | Germany |
| Greencells GmbH | Germany |
| Grid Parity AG | Germany |
| groSolar | USA |
| Groupo Ortiz | Spain |
| Guizhou Electric Design & Research Inst. | China |
| hep energy GmbH | Germany |
| HerBo GroenLeven BV | Netherland |
| IBC Solar | Germany |
| IBERICA Solar | Spain |
| ILF Beratende Ingenieure GmbH | Germany |
| Jayme da Costa | Portugal |
| Juwi AG | Germany |
| König Solar | Austria |
| Krannich Solar Projekt GmbH | Germany |
| La Compagnie du Vent | France |
| Lahmeyer International GmbH | Germany |
| LUXEL SAS | France |
| M+W U.S. Inc. | USA |
| MKG Montagebau Karl Göbel e.K | Germany |
| Mott MacDonald Limited | UK |
| Naturstrom AG | Germany |
| Nexamp | USA |
| Omexom | France |
| Panasonic Latin America S.A. | Panama |
| PanelClaw Inc. | USA |
| Phoenix Solar AG | Germany |
| Photovolt Development Partners GmbH | Germany |
| Power Engineering Consulting Joint Stock Company 4 (PECC4) | Vietnam |
| Power Engineering Consulting JS. Company 3 (PECC3) | Vietnam |
| Power Partners MasTec LLC | USA |
| PowerSecure | USA |
| Pro-Tech Energy Solutions | USA |
| Proenex | Spain |
| ProSolarTec GmbH | Germany |
| Prosolia | Portugal |
| Quanta Power Generation (Intermountain Electric Inc., Quanta Solar Solutions, DG) | USA |
| R&L Solar Solutions Co. Ltd | Japan |
| RCR Energy Pty. Ltd. | Australia |
| REC Systems Germany GmbH (REC Group) | Germany |
| RES SAS | France |
| RODINA AG | Ukraine |
| Saferay Holding GmbH | Germany |
| SARL TALEV | France |
| SBC Renewables Ltd (vorm. The Solar Building Company Ltd.) | UK |
| SBY | Israel |
| Scatec Solar Solutions GmbH | Germany |
| Schletter GmbH | Germany |
| Schneider Electric France | France |
| Selina Technology & Management GmbH | Austria |
| Shanghai Electric Power Design Institute | China |
| Sichuan Electric Power Design Consulting Co.,Ltd. | China |
| Siconia Energy Consultants, S.L. | Spain |
| SMEC | Australia |
| Solaire Direct | France |
| SOLAR PHILIPPINES | Philippines |
| Solarfaktor GmbH | Germany |
| Solarig Global Service | Spain |
| Solarnet GmbH | Germany |
| Soleg Solar | Thailand |
| SOLSYSTEMS ENERGY GmbH | Germany |
| Sonnadix Solar (Oriana/Horizon Energy, LLC) | Puerto Rico |
| Sonnedix | Spain |
| Sonnedix UK Services Limited | UK |
| Southern Company | USA |
| SPM GmbH | Germany |
| Sterling & Wilson | India |
| Strata Solar | USA |
| Sunel Energji | Turkey |
| SUNEL UK LTD | IK |
| SunGrow Deutschland GmbH (China) | Germany |
| Sunlink | USA |
| Talesun Energy Solutions S.R.L. | Italy |
| Tata Consulting | India |
| TradeWind Energy | USA |
| Univergy Int. S.L. | Spain |
| Vattenfall AB / nuon | Sweden / Netherland |
| Vectorcuatro | Spain |
| Viridi RE GmbH | Spain |
| Voltalia | Portugal |
| WElink Group | Italy |
| Westwood PS | USA |
| WIRCON Gmbh | Germany |
| WSP USA Inc. | USA |
| X-ELIO | Spain |
| Xibei Engineering Cor. Ltd. | China |
| Yamasa | Japan |
| Zenviron Pty. Ltd. | Australia |
