A data processing unit comprises a first interface for exchanging first information with at least one motor vehicle and a second interface for exchanging second information with a plurality of charging stations for charging an energy storage device of a first motor vehicle. The first interface is configured to exchange the first information with a plurality of motor vehicles, and the data processing unit is configured, when receiving the first information relating to a charge status at the point in time of a desired charging of the energy storage device and a maximum charging power of the at least one motor vehicle, and the second information relating to a charging power available from at least at one charging station at a predetermined point in time, to create a strategy by which a particular motor vehicle is assigned to a particular charging station for a point in time for charging-start.