Charging Current20A; USB Output: 5V/2A Max; Battery Voltage: 12V/24V Automatic Identification; Size: 133*70*35mm; Weight: 132g. The solar charge controller is only suitable for lead-acid batteries: OPEN, AGM, GEL. Safety ProtectionBuilt-in short circuit protection, open circuit protection, reverse protection, overcharge protection. With full 3-stage PWM charge management. FeatureBuild in industrial microcontroller. Charge and discharge parameters are adjustable. The load working mode can be set. Heat DissipationDouble MOS reverse current protection, low heat generation, low failure rate. Extend battery life and keep the load working. Easy to UseWith LCD display that clearly shows status and data, it is easy to set up and use. Suitable for home, commercial, industrial, etc. Features The solar charge controller is a kind of intelligent and versatile solar charge and discharge controller. The solar charge controller can fully meet the requirements of your home photovoltaic system (including home lighting system). Connection Steps: Connect the battery to the charge controller. Connect the solar panels to the charge controller. Connect the consumer to the charge controller. NOTE: 1. The reverse order applies when uninstalling. Incorrect connection sequence will damage the controller. 2. The solar charge controller is only suitable for lead-acid batteries: OPEN, AGM, GEL, not suitable for nickel hydride, lithium, lithium-ion or other batteries. Package includes 1 20A Solar Charger Specifications Battery Voltage: 12V/24V Charge Current: 20A Discharge Current: 10A Maximum Solar Input: <50V Float Charge: 13.7V (default, adjustable) Discharge Stop: 10.7V (default, adjustable) Discharge Reconnect: 12.6V (default, adjustable) USB Output: 5V/2A Self-Consumption: <10mA Working Temperature: -35~+60