Power supply system

A power supply system for contactlessly supplying power supplied from a power supply, to a load in a slidable object capable of sliding with respect to a body of a vehicle,

• the body of the vehicle comprising:
• a power transmission unit capable of transmitting power supplied from the power supply;
• a transmission-side communication unit capable of communication;
• and
• a transmission-side control unit configured to control power transmission of the power transmission unit based on information communicated by the transmission-side communication unit,
• the slidable object comprising:
• a power receiving unit configured to contactlessly receive power from the power transmission unit;
• a determination unit configured to determine whether or not to transmit power from the power transmission unit to the power receiving unit;
• a receiving-side communication unit configured to transmit, to the transmission-side communication unit, information indicating a determination made by the determination unit as to whether or not to transmit power;
• and
• a power storage unit configured to supply power to the determination unit and does not supply power to the load.