| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water storage type hot water supply device which suppresses increase in the amount of purchasing electric power of commercial power by facilitating the utilization of electric power generated by photovoltaic power generation device when performing boiling of water in a hot water storage tank in preparation for a large amount of hot water supply.SOLUTION: A hot water storage type hot water supply device 1 includes: a photovoltaic power maximum generation time prediction unit 129 which predicts the photovoltaic power maximum generation time in which the power generation by a photovoltaic power generation device 150 becomes maximum, on a boiling execution date; a large amount of hot water supply start time prediction unit 122 which predicts the large amount of hot water supply start time when the supply of hot water for a predetermined amount or more from a hot water tapping pipe 13 is started, on the boiling execution date: a time necessary for boiling setting unit 124 which sets the time necessary for boiling; and a boiling control unit 125 which starts the boiling processing in preparation for the hot water usage from the large amount of hot water supply start time from the time within predetermined ranges before and after the photovoltaic power maximum generation time, when the large amount of hot water supply start time is the time after the photovoltaic power maximum generation time by the time necessary for boiling. |
