STORAGE TYPE HOT WATER SUPPLY DEVICE

摘要

Provided is a storage type hot water supply device which suppresses an increase of purchases of commercial power by promoting the use of power generated by a photovoltaic device when boiling water in a storage tank provided in a hot water supply system. The storage type hot water supply device (1) comprises: a maximum photovoltaic power generation time predictor (129) which predicts the maximum photovoltaic power generation time when power generated by the photovoltaic device (150) is maximized; a hot-water supply start time predictor (122) which predicts hot-water supply start time when the supply of hot water more than a predetermined amount starts from a hot-water outlet (13) on a boiling execution day; a required boiling time setting unit (124) which sets up required boiling time; and a boiling control unit (125) which starts to boil water from time within a predetermined range before and after the maximum photovoltaic power generation time in preparation for the use of hot water from the hot-water supply start time, when the hot-water supply start time is later than time after as much as the required boiling time from the maximum photovoltaic power generation time.