Features: 1. Adopt industrial microcontroller, charging and discharging parameters can be adjusted. 2. Complete PWM charging management in 3 steps. 3. Built-in a variety of protection functions, including overcurrent, short circuit, open circuit, reverse connection, etc. 4. Large LCD screen with backlight. 5. Double MOSFET reverse current protection, low heating output. Specifications: Features: 1. Adopt industrial microcontroller, charging and discharging parameters can be adjusted. 2. Complete PWM charging management in 3 steps. 3. Built-in a variety of protection functions, including overcurrent, short circuit, open circuit, reverse connection, etc. 4. Large LCD screen with backlight. 5. Dual MOSFET reverse current protection, low heating output. Specification: Model (optional)YJSS-10AYJSS-20AYJSS-30A Battery voltage 12V/24V self-adaptive Charging current10A20A30A Discharge current10A10A10A Solar input max galizationB01 sealedB20 GelB03 flood 14.4V14.2V14.6V Floating charge13.7V (by default, 12.7-15V adjustable) Discharge shutdown 10.7V (default, 9 -11.3V adjustable) Discharge reconnection 12.6V (default, 11.5-13V adjustable) Standby current USB output 5V/2A max Operating Temperature -35~60 Size 133*70*35mm / 5.2*2.7*1.3in Weight Approx. 148g / 5.2oz Tips: All red voltage is only for 12V system, please double it when using 24V system. Package List: 1 * Solar Charge Controller 1 * Manual < br> Note: 1. The regulator is only suitable for lead acid batteries: OPEN, AGM, GEL. Not suitable for NiMH, Li-ion or other batteries. 2. Make sure your battery has sufficient voltage for the controller to recognize the battery type before first installation. 3. The battery cable should be as short as possible to minimize losses. 4. The charge controller is only suitable for regulating solar modules. Never connect another charging source to it. 5. The controller will be hot when running. Please install it in a well-ventilated area.