BSP Group GmbH is your partner for sustainable energy solutions and facade construction in Eastern Switzerland, specializing in photovoltaic systems and innovative building envelopes.

PowerPack GmbH offers consulting, planning, import, sales, and installation of customized battery storage systems including inverters. The company focuses on affordable, safe, and scalable energy storage solutions for homes and businesses.

Keller + Hofer AG is a trusted provider of heating and sanitary solutions. The company specializes in efficient heating systems, heat pumps, solar and wood-based technologies, as well as high-quality sanitary installations. Services include planning, installation, modernization, maintenance, repairs, and emergency support for new builds and renovations. The focus: reliable, sustainable building technology delivered with technical expertise, clean execution, and strong customer commitment.