We develop innovative concepts for the energy supply of districts and villages and innovative solutions for the energy supply of buildings. The use of renewable energies as well as an economical and ecological life cycle assessment are an integral part of these innovative concepts. After the successful realization of our concepts, we are involved in the commissioning; based on monitoring, we develop proposals for the optimization of the system operation. For single-family houses and multi-family residential buildings as well as office and industrial buildings, we develop technologies and strategies for an energy-efficient and resource-efficient operation. In addition, our smart home solutions also increase energy efficiency as well as comfort and thus increase well-being and productivity.