This system uses the fluid in the copper heat pipe as heat exchanger, which the heat startup is very fast. The all-glass evacuated solar collector tubular is heated by the sun and transfers the heat to the fluid in the copper heat pipes by the aluminum heat-conducting sheet. Then the fluid changes from liquid into vapour by heating and goes up inside the heat pipe. After exchanging the heat between the condenser end of the heat pipe with the water in the storage cylinder, the fluid turns into liquid again and goes down to the base of the heat pipe. By this circulation the water in the storage cylinder is heated by the heat pipe as long as the sun shines. When hot water is used cold water will be supplied from the bottom of the storage cylinder. In this system there is no water flowing in the evacuated tubes so it is specially used in frost areas. There is no scale in the tubes, which will keep the collector in good condition of heat efficiency.