In 2015, due to the promotion of photovoltaic products around the world, some Pakistani clients proposed if we could develop a fan suitable for the solar systems. At first, we defined the product as a fan that can coordinate with solar system. After our market research, it was found that many local consumers did not use the solar systems, and consumers only used solar energy to store electricity for batteries. Therefore, we have developed a fan that could directly use solar panels, and can directly connect to 9-23v DC voltage, and can adapt to different solar panels as well as different batteries. The products have wide use scenarios and low price, which has been recognized by the local market