Abstract:

The scope of the e-SolCar project aimed to enhance the urban grid structures to address the future challenges in photovoltaic generation and loads from e-mobility, the fleet consisting of about 41 battery electric vehicles (BEV) has been put into operation. These BEV are supplied through 100 kW peak PV, stationary batteries (of 2000kWh installed capacity) or the main grid, depending on system situation. In the near future, these electric cars will also be able to give the stored energy back to the grid (V2G). This ability will be applied in order to check the technical feasibility and the potential contribution to grid stability, since electric cars will be used not only as loads but also as positive and negative control powers. After a fleet testing phase of almost one year, the authors were able to analyze some acquired data. Furthermore, they took a closer look at particularities of the mobile storage system, such as experiences with charging electric vehicles (Battery Management System), handling high-voltage batteries, problems, advantages and disadvantages of the mobile storage system, recommendations and necessary improvements.