Operation method and operation device of power storage system, power storage system, and non-transitory storage medium

An operation device of a power storage system including a plurality of power storage facilities, the operation device comprising a processor configured to:

• group the plurality of power storage facilities into a plurality of groups, and set a plurality of SOC ranges shifted from each other as an option of an operation SOC range of each of the plurality of groups;
• select one of the plurality of SOC ranges to be the option as the operation SOC range for each of the plurality of groups so as to be in a state in which the SOC ranges selected are different between the plurality of groups, and operate a power storage facility belonging to each of the plurality of groups in an SOC range selected as the operation SOC range;
• and
• sequentially switch, between the plurality of SOC ranges, an SOC range selected as the operation SOC range for each of the plurality of groups so as to be in a state in which the SOC ranges selected are different between the plurality of groups.

A non-transitory storage medium storing an operation program of a power storage system including a plurality of power storage facilities, the operation program causing a computer to implement:

• grouping the plurality of power storage facilities into a plurality of groups, and setting a plurality of SOC ranges shifted from each other as an option of an operation SOC range of each of the plurality of groups;
• selecting one of the plurality of SOC ranges to be the option as the operation SOC range for each of the plurality of groups so as to be in a state in which the SOC ranges selected are different between the plurality of groups, and operating a power storage facility belonging to each of the plurality of groups in an SOC range selected as the operation SOC range;
• and
• sequentially switching, between the plurality of SOC ranges, an SOC range selected as the operation SOC range for each of the plurality of groups so as to be in a state in which the SOC ranges selected are different between the plurality of groups.