1、MPPT Technology: This solar charge controller adopts ultra modern controller technology (microprocessor), which increases the MPPT charging current by 10‑30%, has an efficiency of >95%. 2、Applicable Battery: Switchable characteristic charging line, which can charge gel battery, dry battery, AGM battery, lithium iron phosphate battery optimally, convenient and practical. 3、2 Charging Interfaces: Main battery automatic charging or board I automatic charging, supporting charging and trickle charging (up to 5A), vehicle starting battery (start II), with overcharge guard. 4、Unmanned Charging: Provides standard guard to prevent battery overload, overheating, reverse charging, and reverse discharging (in case of insufficient solar energy, such as at dusk, night, etc.). 5、Overcharge Guard: When the solar power is too large and the battery is full charged, the charging current of the battery is reduced to ensure that the battery is always in the best charging state. 1 x Solar Charge Controller 1 x User Manual Item Type: MPPT Solar Charge ControllerPV Power: 680WPV Charging Current: 40ATemperature Compensation: -3mv/℃/2VStandby Current: 15+2mAOperating Temperature: -20-50℃Product Size: Approx. 190 x 215 x 70mm / 7.5 x 8.5 x 2.8inWeight: Approx. 1930g / 68.1ozMaterial: ABS, Aluminum Alloy