| Company | Location | Website |
|---|
| Built Environs | Adelaide, South Australia | Visit site |
| Built Robotics | San Francisco, California | Visit site |
| Bundesministerium für Bildung und Forschung | Berlin, Berlin | Visit site |
| Bundesverband Erneuerbare Energie e.V. (BEE) | Berlin, Berlin | Visit site |
| Bundesverband Neue Energiewirtschaft e.V. (bne) | Berlin, Berlin | Visit site |
| Buoyant Ventures | Chicago, Illinois | Visit site |
| Bureau Veritas | Sunrise, Florida | Visit site |
| Bureau d'études Pierre Berger S.A. | Chaudfontaine, Liege | Visit site |
| Bureau of Indian Standards | New Delhi, Delhi | Visit site |
| Bureau of Land Management | Washington, District of Columbia | Visit site |
| Burns & McDonnell India | Mumbai, Maharashtra | Visit site |
| Buro Happold | Bath, England | Visit site |
| Business Oregon | Salem, Oregon | Visit site |
| Buss Energy Group | Hamburg, Hamburg | Visit site |
| Butcher Power Products | Sacramento, California | Visit site |
| Butterfield Electric Inc. | Woodland, California | Visit site |
| Buttimer Engineering | Roscrea, Tipperary | Visit site |
| ByoMax | Singapore | Visit site |
| Byson | Suzhou Shi, Jiangsu | Visit site |
| BİOTREND | Beykoz, Istanbul | Visit site |
| becquel - experts en instal·lacions fotovoltaiques | Alcarràs, Lleida | Visit site |
| beegy GmbH | Mannheim, Baden-Württemberg | Visit site |
| bewind GmbH | Rendsburg, Schleswig-Holstein | Visit site |
| blueOASIS | Ericeira, Lisbon | Visit site |