POWER SUPPLY UNIT AND VEHICLE

A power supply unit includes a current path, and is capable of receiving external power from an external power supply and supplying the received external power to a power storage device, and receiving power from the power storage device and supplying the received power to a device mounted in a vehicle. The power supply unit comprises one or more power converters, a relay that switches the current path. and a housing that accommodates the one or more power converters and the relay therein. The one or more power converters are heavier in weight than the relay and disposed in the housing below the relay.