Power distribution control apparatus, electricity storage system, and power distribution control method

A power distribution control apparatus includes a power source switcher that switches a power source for supplying electric power to a plurality of load groups between a commercial power source and a battery, control circuitry that controls the power source switcher and a plurality of switches provided in power supply paths between the power source switcher and each of the load groups, and a memory that stores positions of the plurality of switches in the order of priority. When the power source switcher switches to the commercial power source and a power saving time zone in which commercial power consumption is to be reduced is reached, the control circuitry controls the switches to be in a non-conducting state, switches the power source from the commercial power source to the battery using the power source switcher, and sequentially controls the switches in a conducting state in the order of priority.