Features:
1)Volume: 100, 150, 200, 250, 300 and 500L
2)Tank material: SUS304-2B, porcelain enamel coating and crystalline coating inner tank
3)Operating temperature of solar collector: -40 to 200ºC
4)Automatic temperature of electrical heater: operates under 45ºC and end above 65ºC
5)Operating pressure: 6 bar (0.6Mpa)

Working principle:
1)Solar collector can connect to pressured water tank and it can be installed on the flat with stand or mounting on the sloping roof without support stand
2)Heat pipe vacuum tube absorbs the heat energy from sunlight, because there is closed-loop between water tank and solar collector, so the heat can transfer to water tank from the solar collector
3)Conduct medium is glycol and water mixture, it can endure the very low temperature and anti freeze, meanwhile it can exchange heat energy with cold water in the water tank
4)With help of the controller system, can balance the temperature of the water tank and the solar collector
5)Temperature difference is higher than preset value, the controller system will start the circulation pump and the heat energy can be transferred between the water tank and solar collector

Advantages:
1)Double coil system can combine with the original water heater perfectly
2)Split pressurzied system is special designed for the cold area, more effetive than the other type solar water heater if in the cold winter
3)Double coil system can used for heating room
4)Solar collector can be placed on the flat roof or sloping roof or fixed on the balcony, generous and nobler
5)Tank can be put in the house that can reduce the resistance of the roof
6)Whole system can be used for swimming pool heating system