The electric car with a charging battery and the intelligent power supply is a part on which we are working together with Energie Baden-Württemberg (EnBW). The second part, and the most important one, is to use the electricity from the charging battery in the private sphere as well. Here at Ernst-Reuter-Platz in Berlin, where the charging station for electric cars and the showroom are located, this idea is being realized. The power from the charging battery is made available to the devices in the showroom. The research results can be presented to a broad public and can thus be experienced.