3 percent. According to Sohu News, effective July 1, 2014, the state will increase the value-added tax applicable to some general taxpayers such as tap water, small hydropower generation, etc. at 6%, 5%, 4% and 4%. .3 The four levels of tax collection rates are combined into one level and the current simplified method of tax calculation is uniformly followed, with a charging rate of 3%.
In principle, there is not much difference. They both rely on water to drive the rotor to turn to produce electricity. However, hydropower generally refers to the use of height differences in reservoir water levels to produce electricity, which requires larger devices. The tap water pipes are so thin and the installation is small. I'm afraid the difference between the two is not minimal in terms of technical details. For autaAs far as I know, hydroelectric technology is mature. If hydroelectric technology is used as a benchmark in producing electricity from tap water, it will at most be considered a practical new technology and not an invention.
And from the point of view of energy saving, the water pressure in the water pipe is obtained by human consumption of energy. Adding devices to the water line will definitely cause the water to lose some water pressure, meaning the water company's pressure. energy is lost. The ideal is to convert the water company's energy into your own electricity without loss, while sacrificing your own water pressure. There is neither an increase nor a saving in energy for society as a whole.