1:highly efficient absorber of high performance with daily average efficiency over 50%. 2:start up quickly, heat pipe transfer the heat energy into the storage tank in one direction . 3:withstand pressure of 6 bar, can be connected directly with tap water . 4:No water inside the evacuated tubes ,the solar water heater can still in service even with several tubes breakage 5:Highly efficient insulation with polyurethane foam 6:simple structure , easy to assemble and install ,diffuse flat plate reflector can be assenbled easily with its module sturcture 7:can be used all year round in the cold climate 8:can be used together with Auxiliary electric boost 9:long service life ,can be used as long as 15 years |