CHARGE/DISCHARGE LOSS REDUCTION METHOD AND CHARGE/DISCHARGE LOSS REDUCTION DEVICE

A charge-discharge loss reduction device includes a power reception control device that controls power received or discharged by power receiving elements included in a load group (11), in a power system that supplies electric energy to the load group (11) including the power receiving elements via a power supply base point (10). The power reception control device is configured to change a priority of an own power receiving element using a charge-discharge state of the own power receiving element, the priority indicating a degree to which power reception of the own power receiving element takes priority over power reception of another power receiving element.