... material:2.75mm aluminum alloysolar collector:three target tube(Cu/SS-coating)superconducting heat pipe:High-purity copper ... coil)Cubage: 100L,150L,200L,250L,300L,400L,500LHeat collector working temperture: -35-200Electrical heater: 45-65hotwater temperature ... heat pipe work as normal operation,the tube cant explode.Fixing on the western-style construction roof,looked very perfectiy.The collector ...