1. Automatic temperature controller for solar water heater, comprising a temperature sensor, which is set in said storage tank and outputs temperature parameters to a temperature controller in real time; this temperature sensor can be selected according to the set temperature or temperature interval to choose the appropriate temperature sensor, such as thermistor, etc. The temperature controller, which is used to receive the temperature sensor output and output a control signal according to the temperature parameters in a predetermined program, can be selected from various PLCs, MPUs, CPUs, etc. as required. Temperature controller, used to receive the temperature sensor output temperature parameters, and according to the temperature parameters in accordance with the predetermined program output control signals, this temperature controller can be selected according to the needs of a variety of PLC, MPU, CPU, etc. to produce; electric shading, set above the collector tube, at least by the driving mechanism and shading curtains;

2. Solar water heater driving mechanism used to receive temperature controller output control signal to drive the shading curtain to open or close according to a predetermined program. Usually the solar water heater consists of bracket 1, storage tank 2 and collector tube 3, solar water heater with automatic temperature controller in the motorized shading includes cover body or shell 4, said drive mechanism and shading curtain is set in said cover body or shell 4, said drive mechanism includes stepping motor and and the stepping motor drive connection of the screw, said screw is located in one side of the cover body or shell;

3. When the solar water heater works, the temperature sensor monitors the water temperature in the storage tank in real time, and transmits the water temperature parameters to the temperature controller, which processes the data according to a predetermined program after receiving the water temperature parameters and outputs a control signal according to the processing results, thus driving the stepping motor to drive the curtain to slide to a reasonable position, to achieve the effect of blocking the sunlight as well as regulating the light-absorbing area, thus enabling the water in the storage tank to be heated up. Thus, the water temperature of the storage tank is always at a reasonable temperature.