Working principle: * The separate pressurized solar water heater compose of solar collector, storage tank, controller, working station and installation parts. * When the discrepant temperature of the solar collector and water tank reaches the set value, the controller shall start the circulation pump automatically. * The circulation pump makes heat-conducting liquid circulate automatically. * The heat-conducting liquid transfers heat to water by heat exchanger in the water tank. * In case the temperature of the water tank does not reach T-max, then start the auxiliary heating device. * If discrepant temperature of the collector and the water tank does not reach the set value, the circulation pump shall be shut automatically. Features: * Collector separates with the storage tank. The tank can be put anywhere of the house. * Module design, arbitrary combination, harmony with the building perfectly. * Intelligent control and automatic operation. * Anti-freeze: No water inside the tubes when it works. * The system controller has the anti-freezing function is that the temperature circulation will operate while it reaches the fixed temperature. Key specifications: * Heat-collection tube: High borosilicate3.3 glass with copper pipe * Inner tank: With enamel layer (2.0mm) * Outer tank: Colored steel: 0.5mm * End Cover of Tank: Colored steel (0.5mm) * Frame: Stainless steel 301 * The material of insulation: Polyurethane Foaming 50mm * Electrical Heater: High grade tube with dry-heating safeguard (1.5kw-3kw, 220v, 50Hz) * Safety Valve: Brass valve (1/2") * Controller: Circulation pump, Joints and other valves