1. Separate Solar water heater, high pressure 2. Heat pipe vacuum ... inner tank, 2 copper coils Separate solar water heater system is made up of solar collector, water tank and workstation. It ... ’s a closed loop solar system. This system is suitable for areas with questionable ... the days without sunshine hot water can also be used.8. Capacity:100L,150L,200L,250L,300L,400L,500L. ...