It has 15years long life span ,and the vacuum tubes can work individually,

so if the only one of them can't work,it won't influence on the others.

The spare parts can be changed freely .it is suitable for the many resident

buildings.

Solar vacuum tube working principle:

1,The high quality vacuum tubes ansorb the solar ultraviolet ray;then heat the
cold water in the vacuum tube
2,The hot water rise in the top of the water tank ,and the cold water sink to
bottom,then heat by solar collector.so the whole system is always circulating
continuously.
3,The electromagnetism or ball valve can perform the water supply automatically,the
water in the tank is not sufficient ,the electromagnetism valve will open its valve,
the tap water flow in the tank ,if the water is full,it will close the valve automatically

Solar vacuum tube features:

1. High heat effectiveness: higher than all glass evacuated solar collector tube by 15%
2. heat pipes conduction: successfully prevents the defects of tube breakage and low power output caused by water fouling and deposits or dust and sand
3. Prevents the tube from being easily broken caused by volume expansion when water freezes in the frigid season
4. Low thermal capacity makes the tube start up quickly
5. Energy output within only 2 minutes of sunshine
6. Insulation temperature can reach 260degree, average heat efficiency can still be more than 50%; even under -50degree