The invention relates to a method and a device for the location-independent power intake of and/or location-independent power feed by a mobile storage and consumption unit at a stationary electric vehicle charging station. The method comprises at least the steps of producing a first communication link between the storage and consumption unit and the electric vehicle charging station when the mobile storage and consumption unit spatially approaches a stationary electric vehicle charging station, a unique ID number being allocated to the storage and consumption unit and the electric vehicle charging station having an electricity counter with a counter number, transmitting a data packet which contains at least the ID number and the counter number via a second communication link to a billing server, allocating the storage and consumption unit to a power supplier using the ID number and allocating the electricity counter to a distribution network operator using the counter number and using the respective data stored on the billing server, clearing the electric vehicle charging station upon successful allocation on the billing server, supplying power to the storage and consumption unit or feeding power from the storage and consumption unit to the electric vehicle charging station and transmitting the quantity of electricity withdrawn from or fed into the electric vehicle charging station to the billing server via the communication link.