DISCHARGE START TIME DETERMINATION SYSTEM FOR ELECTRICITY STORAGE DEVICE AND DISCHARGE START TIME DETERMINATION METHOD FOR ELECTRICITY STORAGE DEVICE

摘要

A discharge start time determination system for a storage battery (2) comprises: an estimation means (61) for estimating the power generation amount of a solar cell panel (1) and a power consumption amount; a power price database (53) in which the times at which the power price is changed are stored; a first comparison means (621) for comparing a necessary amount at high price time with a dischargeable capacity; and a discharge start time determination means (63) for, when the necessary amount at the high price time is estimated to be the dischargeable capacity or more, setting a second time as a discharge start time and for, when the necessary amount at the high price time is estimated to be less than the dischargeable capacity, setting any time after a first time and before the second time as the discharge start time.