A quick charging system comprising: a power storage unit; a power supply unit adapted to supply electrical power stored in the power storage unit to a battery of another apparatus; a power distribution unit adapted to distribute electrical power of a power distribution network to the power storage unit so as to store the electrical power in the power storage unit; a power generation unit adapted to generate electrical power using renewable energy and stores the generated electrical power in the power storage unit; and a control unit that controls the power distribution unit, wherein the control unit performing: a first process of calculating a transition of an expected amount of stored electrical power of the power storage unit on the basis of a transition of an expected amount of power generation of the power generation unit, a transition of an expected amount of power supply of the power supply unit, and a current amount of the stored electrical power of the power storage unit, in a case where each of the amount of power generation of the power generation unit and the amount of power supply of the power supply unit follows the transition and electrical power continues to be supplied from the power distribution network to the power storage unit according to settings, and a second process of setting a power reduction time zone, which is a time zone in which a supply of electrical power from the power distribution unit to the power storage unit is reduced or interrupted, when presence of a first time, which is a time when the expected amount of the stored electrical power starts to exceed a first reference capacity, is shown in the transition of the expected amount of the stored electrical power of the power storage unit. a power storage unit; a power supply unit adapted to supply electrical power stored in the power storage unit to a battery of another apparatus; a power distribution unit adapted to distribute electrical power of a power distribution network to the power storage unit so as to store the electrical power in the power storage unit; a power generation unit adapted to generate electrical power using renewable energy and stores the generated electrical power in the power storage unit; and a control unit that controls the power distribution unit, a first process of calculating a transition of an expected amount of stored electrical power of the power storage unit on the basis of a transition of an expected amount of power generation of the power generation unit, a transition of an expected amount of power supply of the power supply unit, and a current amount of the stored electrical power of the power storage unit, in a case where each of the amount of power generation of the power generation unit and the amount of power supply of the power supply unit follows the transition and electrical power continues to be supplied from the power distribution network to the power storage unit according to settings, and a second process of setting a power reduction time zone, which is a time zone in which a supply of electrical power from the power distribution unit to the power storage unit is reduced or interrupted, when presence of a first time, which is a time when the expected amount of the stored electrical power starts to exceed a first reference capacity, is shown in the transition of the expected amount of the stored electrical power of the power storage unit.