| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water storage type hot water supply device which performs boiling of hot water by electric power in a hot water storage tank in preparation for the usage of a large amount of hot water, by suppressing decrease in the amount of electric power to be sold in electric power generated by a photovoltaic power generation device.SOLUTION: A hot water storage type hot water supply device 1 includes: a large amount of hot water supply start time prediction unit 122 which predicts a large amount of hot water supply start time which is the time when supply of hot water for a predetermined amount or more is started from a hot water tapping pipe 13 on a boiling execution date; a time necessary for boiling setting unit 124 which sets time necessary for boiling; and boiling control unit 125 which starts water boiling processing in a hot water storage tank 11 in preparation for the hot water usage from the large amount of hot water supply start time before the sunrise time, when the large amount of hot water supply start time is within the range from the time after the sunrise time by the time necessary for boiling, to the sunset time. |
