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) includes: an estimator (61) that estimates a 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 comparator (621) that compares a necessary amount at a high price time with a dischargeable capacity; and a discharge start time determiner (63) that, when the necessary amount at the high price time is estimated to be the dischargeable capacity or more, sets a second time as a discharge start time, and that, when the necessary amount at the high price time is estimated to be less than the dischargeable capacity, sets any time equal to or later than a first time and earlier than the second time as the discharge start time.