Our energy system is changing rapidly: The expansion of renewable energy leads to a decentralized and fluctuating supply, because the sun and wind do not let us generate energy whenever and wherever we need it. Efficient storage systems and an intelligent, dynamic interaction of various technologies are required – not only in individual buildings, but also in districts and entire cities. ehub – short for Energy Hub – is Empa’s energy research platform. It gives partners from all over the world access to data from several thousand measurement points and lets them control each component of the infrastructure individually or in combination with others. Thus, the ehub platform enables research and business partners to optimize energy management in individual buildings and at the district level, thereby advancing the energy transition.