Feature - This controller can only be applicable for lead-acid batteries. - Solar Charge Controller regulates the voltage from solar panels going to battery. - Build-in industrial master chip to control the charger and discharge process.Parameters are adjustable. Prolong the battery life cycle and keep the load work well. - Professional 3-stage PWM charge management, all necessary protections equipped. Short-circuit protection, open-circuit protection, reverse polarity protection - Dual USB with 5V/2A provides charging to universal mobile phone devices.LCD screen with backlight function clearly indicates status and data. - Great Heat Dissipation. Dual MOS reverse current protections, low calorific value. - Easy to install and operate, suitable for home, industrial and commercial solar energy system application. Specifications - Color: Color: Blue - Material: Plastic - Size: Approx.13.3 x 7 x 3.5 cm/ 5.24 x 2.76 x 1.38 inch (LxWxH) - Battery Voltage: 12V/ 24V (Auto recognition) - Charge Current: 10A - Operating Temperature: -35 ~ +60 - Storage Temperature: -35 ~ +60 - Application: Home, Industrial, Commercial - Self consuming: le;10mA - Over charge Protection: 14.4V/28.8V - Over charge Floating charge: 13.7V/27.4V - Charge recover voltage: 12.6V/25.2V - Over discharge Protection: 10.7V/21.4V - Over discharge Recover: 12.6V/25.2V - USB output: 5V/2A - 12V battery can only access 18V-20V solar panels - 24V battery can only access 36-40V solar panels - 10A (12V/ 120W (MAX) 24V/ 240W (MAX) ) - 20A (12V/ 240W (MAX) 24V/ 480W (MAX) ) - 30A (12V/ 360W (MAX) 24V/ 720W (MAX) )