Feature:1. Solar controller, 12V/24V automatic identification, ultrawide charge and discharge adjustable.2. Can charge 3 kinds of batteries, leadacid, ternary lithium, and lithium iron phosphate batteries.3. Support dual reverse current protection, low heat generation, stable performance.4. With short circuit protection, open circuit protection, reverse connection protection, overload protection.5. Support 2 USB outputs, maximum 5V/2A, rated charging current is 20A.Specification:Item Type: Solar Charge ControllerMaterial: PlasticWeight: Approx. 151g / 5.3ozProduct Size: Approx. 13.3x7cm / 5.2x2.8inSystem Voltage12V/24V automatic recognition (no power storage function)Rated Charging Current20ARated Discharge Current10ABattery TypeMaximum Photovoltaic VoltageWhen the battery is 12V, the maximum voltage is 23V, when the battery is 24V, the maximum voltage is 46VBattery TypeLead-acid battery/lithium ion battery (ternary lithium)/lithium iron phosphate batteryCharging Cut-Off VoltageLead-Acid BatteriesThe default value is 14.4V (not adjustable)Ternary Lithium BatteryThe default value is 12.6V (not adjustable)Lithium Iron Phosphate BatteryThe default value is 14.6V (not adjustable)Discharge Recovery VoltageLead-Acid BatteriesThe default value is 12.6V (adjustable 11.5V-13V)Ternary Lithium BatteryThe default value is 10.5V (adjustable 10V-11V)Lithium Iron Phosphate BatteryThe default value is 12.0V (adjustable 11.5V-12.5V)Discharge Cut-Off VoltageLead-Acid BatteriesThe default value is 10.7V (adjustable from 9.5V to 11.5V)Ternary Lithium BatteryThe default value is 9.0V (adjustable from 8.5V to 9.5V)Lithium Iron Phosphate BatteryThe default value is 10.0V (adjustable from 9.5V to 10.5V)Float VoltageLead-Acid BatteriesThe default value is 13.7V (adjustable from 13V to 15V)Ternary Lithium BatteryThe default value is 12.0V (adjustable 11.5V-12.5V)Lithium Iron Phosphate BatteryThe default value is 13.8V (adjustable from 13V to 14.5V)USB Output2 USB Outputs, Maximum 5V/2AStand-By Current<10mAOperating Temperature-35-+60Please note that the voltage in the example is only for the 12V system, if you use the 24V system, please multiply by 2..Package List:1 x Solar Charge Controller1 x ManualNote:1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.