The invention relates to a method for supplying power from a power supply unit (1) to at least one motor vehicle (K1, K2) that requires a power supply. A position of a vehicle-side power supply interface (2) is determined and the vehicle-side power supply interface (2) is automatically coupled to a power supply interface (100) of the power supply unit (1). The automated coupling takes place by virtue of the power supply interface (100) of the power supply unit (1) being moved by a robot (11) to the vehicle-side power supply interface (2) and coupled thereto. According to the invention, the position of the vehicle-side power supply interface (2) relative to the power supply unit (1) is determined prior to implementation of the power supply procedure by the motor vehicle (K1, K2) itself, and is transmitted from the motor vehicle (K1, K2) to the power supply unit (1). This allows power to be supplied more efficiently at a power supply unit.