Solar water heater is a kind of equipment that uses the principle of solar photothermal conversion to convert solar energy into heat energy and provide hot water for people. Solar water heater has the advantages of energy saving, environmental protection, safety, economy, etc. It is a green product that conforms to the concept of low-carbon economy and sustainable development. With the acceleration of product development of domestic enterprises, with the two-wheel drive of new technologies and industrial policies, the future market of China's solar water heater industry will usher in development opportunities, and it is expected that by the end of 2023, the market size of China's solar water heater industry will grow to 4.38 billion yuan, an increase of 13.8%.