This Solar Battery Charge Controller 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 batteries are not overcharged. Features - - Size: 19.5 x 5 cm. - Material: ABS. - Stable performance: Built-in industrial microcontroller for stable operation in cold, high temperature and humid environments. - The 12V/24V voltage is automatically recognized and intelligent, providing more convenience for your life. - Large LCD screen: ensures easy and intuitive operation. - Dual USB output: Easily connect to your phone for fast, powerful charging of your phone. - Comprehensive protection: Provides overcharge, overdischarge, overload protection, and short circuit and reverse connection protection. Specification - Rated charging : 30A. - Rated load : 30A. - Working voltage: 12V/24V. - Floating charge voltage: 13.8V/27.6V (adjustable). - Undervoltage protection: 10.7V/21.4V (adjustable). - Charger controller specification charging mode: 3 kinds. - Working temperature: 35-60°C. - Storage temperature: 40°C -70°C. Package list: 1 x solar controller