An inductive power transfer system for transferring electric energy to a vehicle, wherein the system comprises - a wayside electric conductor arrangement, wherein the wayside electric conductor arrangement comprises at least one energy transfer coil for producing an alternating electromagnetic field and for thereby transferring the energy to the vehicle, - a vehicle side receiving device for receiving the alternating electromagnetic field and for producing electric energy by magnetic induction, wherein the receiving device comprises at least one production coil of an electric line, so that a single phase or plural phase electric current is produced during operation, wherein - the wayside electric conductor arrangement is combined with an array of a plurality of sensor coils, the sensor coils being placed side by side to form the array, - the array extends in directions transverse to a field direction of the electromagnetic field, which field direction extends from the wayside electric conductor arrangement to the vehicle side receiving device during transfer of the energy to the vehicle, - a detector arrangement is connected to the plurality of the sensor coils, the detector arrangement being adapted to detect an effect of any magnetic and/or electrically conducting body (3, 6), that is possibly located in the field direction, on at least one electrical property of at least one of the sensor coils, - a position determining device is connected to the detector arrangement, - the at least one energy transfer coil is a coil different from the plurality of sensor coils, - the receiving device comprises at least one marker body, which is a magnetic and/or electrically conducting body different from the at least one production coil, - characterized in that the position determining device is adapted to determine the position of the vehicle side receiving device from a detection result of the detector arrangement, the detection result indicating the sensor coil / sensor coils which is/are nearest to the marker body. - a wayside electric conductor arrangement, wherein the wayside electric conductor arrangement comprises at least one energy transfer coil for producing an alternating electromagnetic field and for thereby transferring the energy to the vehicle, - a vehicle side receiving device for receiving the alternating electromagnetic field and for producing electric energy by magnetic induction, wherein the receiving device comprises at least one production coil of an electric line, so that a single phase or plural phase electric current is produced during operation, - the wayside electric conductor arrangement is combined with an array of a plurality of sensor coils, the sensor coils being placed side by side to form the array, - the array extends in directions transverse to a field direction of the electromagnetic field, which field direction extends from the wayside electric conductor arrangement to the vehicle side receiving device during transfer of the energy to the vehicle, - a detector arrangement is connected to the plurality of the sensor coils, the detector arrangement being adapted to detect an effect of any magnetic and/or electrically conducting body (3, 6), that is possibly located in the field direction, on at least one electrical property of at least one of the sensor coils, - a position determining device is connected to the detector arrangement, - the at least one energy transfer coil is a coil different from the plurality of sensor coils, - the receiving device comprises at least one marker body, which is a magnetic and/or electrically conducting body different from the at least one production coil, - characterized in that the position determining device is adapted to determine the position of the vehicle side receiving device from a detection result of the detector arrangement, the detection result indicating the sensor coil / sensor coils which is/are nearest to the marker body.