First, the use of solar water heater does not consume any conventional energy, but the use of inexhaustible solar energy. The sun all the time during the fusion reaction, the power of power of 3.9 10 23 kW, the earth's surface which can receive about 8.5 10 power of 13 kW, equivalent to dozens of world electricity generation Times. Sun in the hydrogen reactor reserves, sufficient to maintain the 60 billion years.
     Secondly, the use of solar water heaters safe, reliable, no explosion, leakage, leakage and so will the risk of personal injury, and auto-run, simple operation, almost no maintenance workload.
     Again, the solar water heater is not solid, liquid, gas discharge, no adverse impact on the environment. If auxiliary heating solar water heater can give full play to its function, even at night or rainy days, and when the sun obscured by clouds, but also all-weather use.
     At present, the promotion of solar water heater spread very rapidly in 1997, nearly 300 million square meters sales area, which ranked first in the world; national solar water heater in the development, production, sale and installation of more than 1,000 enterprises, the annual output value of 2 billion yuan.