SUAOKI 20A Solar Charger Controller 12V/24V PWM Solar Panel Regulator Auto Parameter Adjustable with LCD Display and Dual USB Port MANAGE THE WORKING OF SOLAR PANEL: the solar charging controller automatically recognizes 12V/24V 20A and protects the lifespan of your battery; suitable for lead acid, colloid, open battery, not suitable for lithium battery RICH LCD SCREEN: very intuitive and easy-to-understand LCD screen displays all parameters of the controller; it uses rich, clear colors and has a built-in energy-saving feature; suitable for home, industrial, and commercial use EASY TO OPERATE: it has a button to control your connected device, which is available for DC lamp and phone charging and more; you can turn on or off the appliance directly through the solar charger controller PROLONG BATTERY LIFE: use the PWM mode to increase system efficiency and achieve constant voltage batterychargingby switching the solar system controller's power devices, which helps to extend the battery lifespan ELECTRIC SAFETY FEATURES: protect your device with the overload short circuit protection, under voltage protection, over charge protection, and reverse polarity protection charge controller; perfect heat dissipation thanks to mosfet protection It reduces costly battery replacements by preventing battery overcharging, short-circuiting, and more thanks to the safety protection functions The PWM mode increases the system&#039;s efficiency, which helps to prolong the lifespan of the battery It is fully automatic and uses 100% of the available solar power It is easy to operate and features a clear LCD display with very intuitive functions and dual USB charging ports