A method for optimized wireless power transfer between two coils by transferring power of a coil of a primary side to a coil on a secondary side, the method including determining a common resonant frequency of the primary and secondary sides by measuring a power consumption of the secondary side, transmitting the measured power consumption to the primary side, and ascertaining and shifting a resonant frequency on the primary side for an improved common resonant frequency based on the measured and transmitted power consumption, or based on a highest efficiency of a power transfer between the coil of the primary side and the coil of the secondary side. The measuring and transmitting of the measured power consumption and the ascertaining and shifting of the resonant frequency forms a repeating process and as a result the resonant frequency of the primary side is continuously adjusted and improved.