Product Description

The vacuum tubes absorb the solar energy and transfer into the heat energy, then pass it to the U pipes. U pipes conduct the heat to the water...The circulation pump makes water circulate every now and then. And Each time the water circulates through the header pipe, the temperatures is raised by ***0 degree. There is no water in the vacuum tube, so the tube will not break in the winter. It can be still operate in the event of occasional tube breakages.    
1.Evacuated tubes convert solar energy into thermal energy that is transferred to copper U pipes by an aluminum fin with high solar energy absorption and low heat radiance loss. Liquid (pure water or glycol solution) in the U pipe heats up, and the U pipe conducts thermal energy to the water inside the storage tank through internal copper coils.
2.Uses an electrical heater to heat water during cloudy days or at night. As the water temperature can be adjusted using an automatic controller,
3.With a testing pressure of *2 MPa, this system has a working pressure of 0.6 Mpa.
4.Solar water heaters can still work even with several tubes broken.
5.Highly efficient insulation with integrated polyurethane foam.