Sunrain Group, the largest solar water heater supplier in the world, is founded in 1999. Sunrain Group is a public listed technology enterprise group dedicated to "Make the world cleaner, make the life better". It has more than 20 years of solar thermal utilization, 10 years of air source heat pumps, and 7 years of photovoltaic business experience, providing clean hot water and thermal energy solutions for 25 million households and 20,000+ engineering customers in over 100 countries. Sunrain group owns more than 8,000 employees, and there are 5 production bases with a total of over 2 million square meters occupied area across China. The turnover in 2021 exceeds over 24 million US dollars. ... more