| B Current Impact Investment Inc. | 臺北市, Taipei | Visit site |
| B&K Management Consulting | Tel Aviv-Yafo, Tel Aviv District | Visit site |
| B&K Solare | Gütersloh, North Rhine-Westphalia | Visit site |
| B-InRoof | Wetzikon, Zürich | Visit site |
| B.F. AUTOMATION S.R.L. | Belfiore, Verona | Visit site |
| BAM BAM Pile Driving | South West Rocks, New South Wales | Visit site |
| BAM UK & Ireland | London, England | Visit site |
| BASF | Ludwigshafen am Rhein, Rhineland-Palatinate | Visit site |
| BATKON Battery Control Technologies Inc. | Sarıyer, Istanbul | Visit site |
| BAUER Elektroanlagen | Buchbach, Bavaria | Visit site |
| BBS Automation | Garching bei München, Bavaria | Visit site |
| BCHAR | Zürich, Zürich | Visit site |
| BDHM Consultants PVT. LTD. | Balasinor, Gujarat | Visit site |
| BDI - Bohn and Dawson, Inc. | St. Louis, Missouri | Visit site |
| BDS | Strongsville, Ohio | Visit site |
| BDSE électricité | Voreppe, Isère | Visit site |
| BEC Technologies, Inc. | Richardson, TX | Visit site |
| BEEM | Patna, Bihar | Visit site |
| BERMAD | Hungerford, England | Visit site |
| BFP Service | Modugno, Bari | Visit site |
| BG&E | Sydney, New South Wales | Visit site |
| BGC | Vancouver, British Columbia | Visit site |
| BGF | London, England | Visit site |
| BGS | London, England | Visit site |
| BHB SOLAR ENERJİ DANIŞMANLIK ANONİM ŞİRKETİ | Erenler, Sakarya | Visit site |
| BHI, CO | Naples, Utah | Visit site |
| BIGSOLAR Photovoltaic Systems | Aspropyrgos, Attica | Visit site |
| BIOFerm | Madison, Wisconsin | Visit site |
| BIOGAZ TECH | Ploërmel, Morbihan | Visit site |
| BIOGEST | Vienna, Vienna | Visit site |
| BIOVEA Energie | Abidjan, Abidjan | Visit site |
| BISOL Group | Prebold, Prebold | Visit site |
| BISTON CONSTRUCTION COMPANY | Parauapebas, Pará | Visit site |
| BK Energies - Energy Storage | Oviedo, Asturias | Visit site |
| BK Energy Co., Ltd.. | Yeosu-si, Jeollanam-do | Visit site |
| BKBM Engineers | Brooklyn Center, Minnesota | Visit site |
| BKW Energy | Bern, Bern | Visit site |
| BKW Italia S.p.A. | Milano, Milan | Visit site |
| BL Systems | Gainesville, Georgia | Visit site |
| BLISON CO. LIMITED | Kampala, Kampala | Visit site |
| BLOCH3 | Krumbach, Lower Austria | Visit site |
| BLOXS GmbH | Grünwald, Bavaria | Visit site |
| BLUETTI | Chino, California | Visit site |
| BMI Country Risk & Industry Analysis | London, England | Visit site |
| BMS HEAVY CRANES | Nørresundby, North Denmark Region | Visit site |
| BMTech Corporation | Plano, Texas | Visit site |
| BNP Paribas Asset Management | Île-de-France | Visit site |
| BNP Paribas CIB | Paris, Île-de-France | Visit site |
| BODEC, Inc. | Price, Utah | Visit site |
| BORGA | Fowler, California | Visit site |
| BPCL Renewable Energy | Mumbai, Maharashtra | Visit site |
| BPI | Oceanside, California | Visit site |
| BQCTECH SDN.BHD. | Shenzhen, Guangdong | Visit site |
| BREMER AG | Paderborn, North Rhine-Westphalia | Visit site |
| BRIGHT | diadikasia | Chalandri, Attica | Visit site |
| BROSETA | Madrid, Madrid | Visit site |
| BRUC | Madrid, Madrid | Visit site |
| BRUGG GROUP AG | Brugg, Aargau | Visit site |
| BRUGG Pipes District Heating Solutions | Kleindöttingen, Aargau | Visit site |
| BS Dağıtık Enerji Sistemleri Ltd. Sti. | Etimesgut, Ankara | Visit site |
| BS Solar Pakistan | Lahore, Punjab | Visit site |
| BSB Electric | Lishui Shi, Zhejiang | Visit site |
| BSI | London, England | Visit site |
| BSK Claus Baurmann | Harsum, Lower Saxony | Visit site |
| BSL ECO Solar | Fujian | Visit site |
| BSRIA Inc. | Chicago, Illinois | Visit site |
| BTrenchless - Colorado | Henderson, Colorado | Visit site |
| BUCHEN | Köln, North Rhine-Westphalia | Visit site |
| BV Steel Technology Inc. | Queensbury, New York | Visit site |
| BVES Energy Storage Systems Association | Berlin, Berlin | Visit site |
| BVI Solar | San Diego, California | Visit site |
| BVi Consulting Engineers - BVi Group | Pretoria, Gauteng | Visit site |
| BW Energy & Innovation | Greenfield, Indiana | Visit site |
| BW GLOBAL | Abbotsford, British Columbia | Visit site |
| BWTS France | Rivery, Somme | Visit site |
| BWTS GmbH | Stäbelow, Mecklenburg-Western Pomerania | Visit site |
| BaTTeRi | Tel Aviv-Yafo, Tel Aviv District | Visit site |
| BackingMinds | Stockholm, Stockholm | Visit site |
| Bahra Electric | Agolada, Pontevedra | Visit site |
| Bain Capital | Boston, Massachusetts | Visit site |
| Baird Mounting Systems | Waterloo, Iowa | Visit site |
| Baja Construction Co., Inc. | Martinez, California | Visit site |
| Baja Renewable Solutions | Tijuana, Baja California | Visit site |
| Balfour Beatty US | Dallas, Texas | Visit site |
| Balfour Beatty plc | London, England | Visit site |
| Balkon Solar | Oosterwolde, Friesland | Visit site |
| Balkon.Solar e.V. | Freiburg im Breisgau, Baden-Württemberg | Visit site |
| Balmoral Comtec | Aberdeen, Scotland | Visit site |
| Balmoral Group | Aberdeen, Scotland | Visit site |
| Balteau Produtos Elétricos Ltda - Grupo WEG | Itajubá, Minas Gerais | Visit site |
| Baltic Energy | Rønne, Capital Region of Denmark | Visit site |
| Bandora | Porto, Porto | Visit site |
| Banga Solar Pvt Ltd | Jamnagar, Gujarat | Visit site |
| Banpu Power Public Company Limited | Bangkok, Bangkok | Visit site |
| Bantam Communications | Charlottesville, Virginia | Visit site |
| Banverde | Jalisco | Visit site |
| Baraclit SpA | Bibbiena, Arezzo | Visit site |
| Baran Group | Bet Dagan, Central District | Visit site |
| Barch Industries | Rock Springs, Wyoming | Visit site |
| Barclays Investment Bank | New York, New York | Visit site |
| Baringa | London, England | Visit site |
| Barkat Cranes And Equipments Pvt. Limited | Mumbai, Maharashtra | Visit site |
| Barnard | Bozeman, Montana | Visit site |
| Barnum & Celillo Electric, Inc. | Sacramento, California | Visit site |
| Barone International | Manila, Manila | Visit site |
| Barr Engineering Co. | Minneapolis, Minnesota | Visit site |
| Base Power Company | Austin, Texas | Visit site |
| Baseload Capital | Stockholm, Stockholm | Visit site |
| Baseload Power Iceland | Reykjavík, Capital Region | Visit site |
| Baseload Power Taiwan | 臺北市, Taipei | Visit site |
| Baseload Power US | Palo Alto, California | Visit site |
| Basic (SunBallast) | Clearwater, Florida | Visit site |
| Basil Energetics Private Limited | Chennai, Tamil Nadu | Visit site |
| Battery Associates | Dublin, Dublin | Visit site |
| Battery Cluster Portugal | Vila Nova de Famalicão, Braga | Visit site |
| Battery Competence Cluster - NL | Helmond, North Brabant | Visit site |
| Battery Consulting Partners | Reading, England | Visit site |
| Battery Council International | Washington, District of Columbia | Visit site |
| Battery Smart | Gurugram, Haryana | Visit site |
| BatteryCycle | Dublin, Dublin | Visit site |
| Bauer Foundation Corp. | Odessa, Florida | Visit site |
| Baumann Consulting | Washington, District of Columbia | Visit site |
| Bay Cities Paving & Grading, Inc. | Concord, California | Visit site |
| BayWa r.e. Solar | Santa Fe, New Mexico | Visit site |
| BeFC Bioenzymatic Fuel Cells | Saint-Priest, Rhône | Visit site |
| BeSafe Consultancy | Northern Governorate | Visit site |
| Beacon Environmental Limited | Markham, Ontario | Visit site |
| Beam Solar Energy Solutions | Diphini, KwaZulu-Natal | Visit site |
| Bear Electrical Solutions LLC | San Jose, California | Visit site |
| Beckhoff Automation | Verl, North Rhine-Westphalia | Visit site |
| Bedrock Environmental | Canfield, OH | Visit site |
| Beehive BPO | San Pedro City, Laguna | Visit site |
| Beeland Solar | Zhuhai Shi, Guangdong | Visit site |
| Beetmann | San Andrés Cholula, Puebla | Visit site |
| Beijer Electronics | Malmö, Skåne | Visit site |
| Beijing Epsolar Technology co,ltd. | Beijing | Visit site |
| Beijing Sifang Automation Co., Ltd. | Beijing, Beijing | Visit site |
| Belden | Clayton, Missouri | Visit site |
| Belmont Solar | Gordonville, Pennsylvania | Visit site |
| Bemsiq Group | Västra Frölunda, Västra Götaland | Visit site |
| Benchmark Mineral Intelligence | London, England | Visit site |
| Bender | Grünberg, Hesse | Visit site |
| Beneq | Espoo, Uusimaa | Visit site |
| Benjamin Media Inc. | Richfield, Ohio | Visit site |
| Bennett + Bennett | Gold Coast, Queensland | Visit site |
| Benthic GeoScience Inc | Sutton, Alaska | Visit site |
| Benthic Solutions Limited | Norwich, England | Visit site |
| Berkshire Partners | Boston, Massachusetts | Visit site |
| Berlinguette Research | Vancouver, British Columbia | Visit site |
| Bernicia Group | Ashington, England | Visit site |