... ,ISO certification high efficient,stable performance, it is widely used Sunshine solar collectors Working principle:There have three parts of the ... up with electric heater so that in the day without sunshine hot water can also be used.3.The heat-pipe ... ,250L,300L,400L,500L ModelLigthing(m2)Heat pipeSupply hot water(L)20/40" containerG.W.(kg)diameterlengthNo.ITM-47-1500-121 ...