Solar controller called the solar charge controller for solar power generation system, the control of multi-square solar cells to charge the battery and the battery power supply to the solar inverter load automatic control equipment. Solar controller with high-speed CPU microprocessor and precision A / D digital converter is a computer data acquisition and monitoring and control systems. Both rapid real-time acquisition the current operating status of the PV system, ready access to job information PV stations, but also detailed historical data accumulated PV station to assess the reliability of rationality and test system components quality PV system design provides accurate sufficient basis. In addition, the solar controller also has a serial communication data transmission capabilities, multiple PV systems can be sub-station for centralized management and remote control. Solar controller usually has six nominal voltage rating: 12V, 24V, 48V, 110V, 220V, 600V.