Established in 1987, Sangle Solar Energy Co., Ltd. has grown into China's biggest solar water heater manufacturer. Headquarter based in Shandong province, Sangle will build altogether 9 manufacturing bases all over China in the near future, now 5 bases have already been established and put into use. Zhejiang Sangle Digitization Solar Energy Co., Ltd is one of them, which covers an area of about 13,500 square meters and has a total production of half million units per year. Sangle have a total investment of USD350 million and its annual production capacity of all the bases reaches 2...