Split Pressurized solar water heater can connect to the pressured water tank and it can be installed on the flat with stand or mounting on the sloping roof without support stand. When the temperature of the heat collector reaches the set value, the controller should start the circulation pump automatically. The circulation pump makes heat-conducting liquid circulate automatically.The heat-conducting liquid transfers heat to water by the heat exchanger in the water tank.In case the temperature of the circulation pump does not reach the set value, the circumlation pump should be stop working automatically.In case the temperature of the water tank does not reach T max, then start the electric heater.