A power control device that can charge a battery by controlling an output of a conversion unit configured to convert a supplied grid electric power into an electric power for charging the battery, the power control device includes: a sensing unit configured to sense voltage and current of the supplied grid electric power; a determination unit configured to determine whether a sensed voltage sensed by the sensing unit is in an unstable state in which the sensed voltage drops relative to a rated voltage of the supplied grid electric power; a calculation unit configured to calculate an allowable power value based on the sensed voltage and a rated current of the supplied grid electric power in a case when the determination unit determines that the sensed voltage is in the unstable state; and a control unit configured to control the output of the conversion unit based on the allowable power value.