Will we be able to do away with the classic centralised energy supply in the future? From a technological perspective: yes. Distributed multi-energy systems are feasible. But from an economic and societal perspective, many questions remain unanswered, blogs Roman Seidl. Thermal solar energy systems heat the floor and water for the shower, an elevator runs on solar and wind energy, and whatever electricity is not consumed today is stored in batteries for tomorrow or will be available next month in the form of gas.