Solar balcony hot water system

The invention discloses a solar balcony hot water system which comprises a water storage bucket and an automatic control device. The solar balcony hot water system is characterized in that a heat collector, a connecting box, a side guard board support and an evacuated-tube tail bracket form a heat collecting module; an open heat cycle repeater, a heat sink, a temperature controller, a temperaturecontrol solenoid valve, a loop thermostatic control valve, a thermodynamic medium inflow pipe, a thermodynamic medium outflow pipe, an upper radiating side pipe and a lower radiating side pipe constituents a thermal protection device; and a dual cycle mode is employed, and the water storage bucket is equipped with two groups of circulation ports. The solar balcony hot water system has the advantages that the auto-circulation functions of an all-glass double-channel evacuated-tube collector and an all-glass evacuated collector inserted with a U-shaped tube are fully utilized, thus realizing natural circulation of the s