Features 13stage PWM charge management improve system efficiency and prolong the life span of the battery. 2Solar controller has short-circuit protection open-circuit protectionreverse protection over-load protection. 3LCD display that can clearly indicate the status and data it can be conveniently switched modes and parameter configuration. 4Twoway MOS tube antibackflow circuit highpower charging mode ultralow heat. 5Charging 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 Current: 20ACharging Mode: 3 stagesFunction: Charge 12V/24V battery ultra-wide charge and discharge adjustableSelf-Consumption: <10MAOvercharge Protection: 14.4V/28.8VOver 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 Manual Note 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.