Description: -The solar charger controller is compatible with 12V or 24V system automatically. Dual USB 5V/3A output ports support mobile phones, tablet PCs or other devices that require 5V voltage. -Provides over-current protection, short-circuit protection, inverse connection protection, low voltage and overcharge protection, a reliable protector for your devices. -Build-in industrial microcontroller for automatical management, memorizing various parameters set by the user and the data won't be lost when the battery runs out. The solar controller will turn off automatically once the voltage is too low. -Intuitive LCD display that can clearly indicate the status and data is able to switch modes and parameter configuration, suitable for home, industrial, commercial, etc. -The charge controller should connect the battery first, then the solar panel, and finally the load! You can change the settings by the simple one-button operation. Specification: Maximum Power 30A-100A USB Outlet VOC: 5V Size: 168x90x2mm/6.6x3.5x0.07 inch Isc: 100A Package Includes: 1 Piece Solar Charge Controller