The book provides an overview of the technologies for planning and constructing energy self-sufficient buildings. These buildings generate as much energy as their occupants consume and are part of a small, decentralized energy generation and storage system. The foundation of decentralized, intelligent building energy supply is the low-energy or passive house. Other important components introduced include: renewable energy converters such as solar cells, solar collectors, and small wind turbines, energy storage systems for hydrogen storage, electrical storage systems, ground storage, heat pumps, fuel cells for utilizing hydrogen energy, as well as forward-looking concepts like façade-integrated photobioreactors and energy management systems. The authors of this work are specialists in their field. The target audience for this book includes civil engineers and environmental engineers.