Features This solar charge controller uses a working microcontroller, and the charging and discharging parameters can be adjusted. Small and lightweight, easy to carry, environmentally friendly charge controller with new energy. Easy to use, easy to use, full level PWM charging management, safe and reliable. With built-in over-current, short circuit, idle, reverse polarity and other protection functions, stable performance, high resolution large screen with backlight. Please note that all red voltages are only for 12V systems, twice as high when using 24V systems, good luck. Specification: Model (optional) YJSS-10AYJSS-20A. YJSS-30A Battery voltage 12V/24V self-adaptive charging current 10A 20A 30A discharge current 10A 10A 10A solar input max. p> 12.6 V (standard, 11.5-13 V adjustable) standby power. Package List