Disclosed is a power supply apparatus for supplying at least one device spaced apart from the power supply with electrical power, the power supply apparatus being connectable to a power grid, the power supply apparatus including at least one position-sensing apparatus for sensing a geometric position of the at least one device. The power supply apparatus can be directed at the at least one device in such a way that power can be wirelessly transmitted by the power supply apparatus to the device and/or the device can be supplied with electrical power by the power supply device.