Just like an automobile engine, the computer CPU, vacuum tube is the solar water heater. Its performance lies on the coating technology, The three-target evacuated tube rise the heat more than *2%. 1) High temperature: by special interference-layer it could bear the high temperature reach to **0°C, and the coating will not shed and aging. 2) Super anti-cold: Super-copper launches mirror, low reflectance, little heat loss ,good absorber results in cold environment, also can generate hot water. 3) Efficient absorption: High absorption is *2%, reflection reduces *5% heat increases *2% Higher temperature, more hot water.

Part 1. Advantages:
1. Excellent performance of absorbing, but low heat loss, Especially adapted to sever cold regions,(super heat preservation). We successfully introduced the Advanced Solar Selective Coating, which achieves the greater thermal efficiency and better thermal stability innovatively. The solar selective coating absorbs most solar radiation as well as suppresses the thermal emittance loss from the coating. With the help of DC magnetron sputtering technology, the absorptance of 0.*4 - 0.*6 and emittance of 0.*4 - 0.*6 has been achieved. The main absorbing wavelength ranges from 0.*5μm to 3.0μm