Equipped with large size LCD screen, show more chargeing information, let you know the chargeing process more clearly. Automatically manages and regulates the voltage and going into the battery from the solar panel, and it's designed with short-circuit protection, open-circuit protection, reverse polarity protection and over-load protection in order to ensure that the are not overcharged the power doesn't run backwards to the solar panels overnight and drain the . Feature - This controller can only be applicable for - and lithium battery. - Solar Charge Controller regulates the voltage from solar panels going to battery. - Build-in industrial to control the charger and discharge process.Parameters are adjustable. Prolong the battery life cycle and keep the load work well. - Large LCD screen design make you use it more easy, show more important information, let you know your battery more well. - Professional PWM charge management, all necessary protections equipped. Short-circuit protection, open-circuit protection, reverse polarity protection - Caution: Please confirm the battery have enough voltage before connect. Please do not use AD/DC power adapter as the charging source. - Great Heat Dissipation. Dual reverse protections, low calorific value. - Easy to install and operate, suitable for home, industrial and commercial solar energy system application. Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Specification - Color: As Shown. - Material: Plastic+LCD+Electronic Component. - Size: 12.5 x 8.4 x 2.8cm. - System voltage: 12V/24V adaptive. - Rated charging : 20A. - Rated discharge : 20A. - Maximum photovoltaic voltage: <41V. - Increase charging voltage: gel type / 14.2V. - Floating charge voltage: 13.7V (default, adjustable). - Discharge cut-off voltage: 10.7V (default, adjustable). - Discharge recovery voltage: 12.6V (default, adjustable). - Standby : <10mA. - USB output: 5V/2A - Working : -35+60 degree centigrade. Package list: 1 x Solar Power Controller