... 3 years warranty for evacuated tube solar collector 2012 hot sell heat pipe evacuated tube solar thermal collector (CE, ISO9001,CGC,Keymark ) ... Multifunction: Bathing, washing, domestic heating etc.If the solar water heater works with the following spare parts, it will be ... Controller----It can controll the water level, displays temperature, back-up controlls electric heater.B. Assistant tank----It can ...