Shuangri Solar hot water heater interlligent controller is the product that we bring into market after a lot of tests, ours solar controller adopts single chip micyoco(SMC) technology of American Motorola company, it is designed with PID comparison, integral calculus, differential controlling software, as a result ours solar controller represents lots of functions, ensure your solar system works automatically, especially to achieve automatic controlling of water level, displaying of water temperature and automatic loading of water etc. With our solar controller you can achieve really automatic controlling of solar thermal system