1、12/24V PWM automatic identification adjustable power solar controller. 2、With overload, reverse connection, over discharge, over charge, short circuit and other protection. 3、Three-stage PWM adjustment charging method with strong charge, balanced charge and float charge. 4、IP56 protection grade, waterproof and dustproof, safe to use. 5、High stability and extremely long service life. 1 x Solar Charge Controller 1 x English Manual Item Type: Solar Charge Controller  Optional Model JN-S 5A, JN-S 10A, JN-S 20A Rated voltage 12V/24V automatic identification Strong charging voltage 14.8V/ 29.6V Balanced charge 14.5V/ 29.0V Floating charge voltage 13.7V/ 27.4V Undervoltage protection 10.8V/ 21.6 Undervoltage recovery 13.0V/ 26.0V Maximum charging current 20A Maximum load current 20A Controller protection Overload, reverse connection, over discharge, over charge, short circuit, etc. Charging mode PWM adjustment mode Use altitude ≤ 5500m (more than 2000m need to reduce power to use) Working temperature  -40-60 ° C Protection class  IP56 Status Indication:  LED light Indicating content Status Function Load Green LED Long light on Load with output Long light off Load without output (light control) Flashing Load without output (undervoltage) Battery Red LED (4PCS) Long light on (partially light on) Battery power (25%-100%) Moving flash Charging Status