A method and a device for determining information about efficiency of an inductive charging system, having a primary coil embedded in a road infrastructure

The invention concerns a method f or dete rmining information about efficiency of an inductive charging system having a primary coil (101, 112), in particular embedded in a road infrastructure (100), wherein a first inductive coupling efficiency component attributed to said road infrastructure is determined from a total efficiency depending on a second inductive coupling efficiency component attributed to a position of a secondary coil (102) relative to said primary coil (101, 112) and of a third inductive coupling efficiency component attributed to an electric circuit comprising said secondary coil (102).