A power control device that is configured to charge a battery by controlling output of conversion means for converting supplied grid electric power into electric power for charging, the power control device comprising: sensing means for sensing voltage and current of the grid electric power; determination means for determining whether a sensed voltage sensed by the sensing means is in an unstable state in which the sensed voltage drops relative to a rated voltage of the grid electric power; calculation means for calculating an allowable power value to which a normal rated power of the grid electric power is reduced based on the sensed voltage and a rated current of the grid electric power in a case where the determination means determines that the sensed voltage is in the unstable state; and control means for controlling the output of the conversion means so as to perform restricted charging in which the normal rated power of the grid electric power is reduced based on the allowable power value, characterized in that the calculation means is configured to recalculate the allowable power value in a state where a value of the voltage sensed by the sensing means further drops in the restricted charging, and the control means is configured to control s the output of the conversion means so as to perform further restricted charging based on the allowable power value recalculated by the calculation means, wherein the determination means is configured to further determine whether a current in a case where the restricted charging is performed with the sensed voltage sensed in the unstable state and the allowable electric power value of the grid electric power is an overcurrent equal to or higher than a threshold current, wherein in a case that no overcurrent has occurred, the control means is configured to return to the step of recalculating the allowable power value. sensing means for sensing voltage and current of the grid electric power; determination means for determining whether a sensed voltage sensed by the sensing means is in an unstable state in which the sensed voltage drops relative to a rated voltage of the grid electric power; calculation means for calculating an allowable power value to which a normal rated power of the grid electric power is reduced based on the sensed voltage and a rated current of the grid electric power in a case where the determination means determines that the sensed voltage is in the unstable state; and control means for controlling the output of the conversion means so as to perform restricted charging in which the normal rated power of the grid electric power is reduced based on the allowable power value, characterized in that the calculation means is configured to recalculate the allowable power value in a state where a value of the voltage sensed by the sensing means further drops in the restricted charging, and the control means is configured to control s the output of the conversion means so as to perform further restricted charging based on the allowable power value recalculated by the calculation means, wherein the determination means is configured to further determine whether a current in a case where the restricted charging is performed with the sensed voltage sensed in the unstable state and the allowable electric power value of the grid electric power is an overcurrent equal to or higher than a threshold current, wherein in a case that no overcurrent has occurred, the control means is configured to return to the step of recalculating the allowable power value.