... set)2) Consist of solar collector, water tank/boiler, circulation pump, expansion evessel, controller,flowing meter,pressure gauge3) Capacity: 150L, ... 200L,250L,300L,500L4) Working temperature: 99 celsius degree4) Working pressure: 1.0MPa (10 bar)5) Vacuum tube: D58 , ... orders A solar water good or not only depends the solar vacuum tube ,If the tubes have high absorptivity.The solar water heater could ...