Feature:1. 3stage PWM charge management, improve system efficiency and prolong the life span of the battery.2. Solar controller has short-circuit protection, open-circuit protection,reverse protection, over-load protection.3. LCD display that can clearly indicate the status and data, it can be conveniently switched modes and parameter configuration.4. Twoway MOS tube antibackflow circuit, highpower charging mode, ultralow heat.5. Charging 12V/24V battery, ultrawide charge and discharge adjustable, 12V is suitable for 18V solar panels, 24V is suitable for 36V solar panels.Specification:Item Type: Solar Charge ControllerMaterial: PVCColor: As shown in the pictureProduct Size: Approx. 13.3x6.8x3cm / 5.2x2.7x1.2inWeight: Approx. 145g / 5.1ozRated Voltage: 12V 24V automatic (12V is suitable for 18V solar panels, 24V is suitable for 36V solar panels)Rated Current: 20ACharging Mode: 3 stagesFunction: Charge 12V/24V battery, ultra-wide charge and discharge adjustableSelf-Consumption: <10MAOvercharge Protection: 14.4V/28.8VFloating Voltage: 13.7V/27.4VOver Discharge Protection: 10.7V/21.4VOver Discharge Recovery: 12.6V/25.2VMaximum Input Power: 240w (12v) 480w (24v).Package List:1 x Solar Charge Controller1 x Instruction ManualNote:1. Please allow 1‑2in 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.3. Without electric power storage function.