An EV-PCS, which is a charger/discharger, includes: a power converter, which is a charging/discharging unit that controls at least one of charging a storage battery mounted on an EV and discharging the storage battery; a charging/discharging cable extending from the power converter; and a charging/discharging connector for connecting the charging/discharging cable to the EV. The charging/discharging connector includes a temperature detection element having a surface covered with resin, the temperature detection element detecting the internal temperature of the charging/discharging connector. The power converter reduces a value of current flowing to the charging/discharging cable during the charge or discharge of the storage battery as the temperature detected by the temperature detection element rises.