DIGIMAX(UP-5P43) 12V 500W Solar ON/OFF grid MPPT charge controller built in protection: Short circuit, overload, low voltage battery, high voltage surge and over heating in temperature MPPT Technology: Aluminum Body to enhance better thermal distribution and durability. Specification: Max Wattage 500W, DC Input Voltage: 12V (10V-44V DC), Rated Input Current 13A, Output Voltage Range 9~16V DC, Maximum Outputting Current 28A, MPPT Efficiency 92% Protection: Short Circuit, Overload, Low Voltage, High Voltage, Over Temperature. Grid: Works both ON and OFF grid High Conversion Rate of Solar Power