1, The system to run automatically, without human duty, saving a lot of manpower 2.Designed with variable frequency driver (VFD), can be used in variable frequency speed regulation technology, greatly improves efficiency, and better to protect water pump and maximum utilization of solar panels. 3, LCD display operating panel, can setting various parameters through LCD, easy to operation. 4,System modular design, stable operation, high reliability and safety, installation and maintenance is very convenient www.cnsandi.com