1、3‑stage 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、Two‑way MOS tube anti‑backflow circuit, high‑power charging mode, ultra‑low heat. 5、Charging 12V/24V battery, ultra‑wide charge and discharge adjustable, 12V is suitable for 18V solar panels, 24V is suitable for 36V solar panels. 1 x Solar Charge Controller1 x Instruction Manual Item Type: Solar Charge ControllerMaterial: PVCColor: As shown in the pictureProduct Size: Approx. 13.3x 6.8x3cm / 5.2x 2.7x 1.2inWeight: 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)