Features: -- Dual USB port: USB output: 5V/3A max, dual USB supply power to two mobile phones, tablet PCs, and other devices. -- Solar battery: Solar charge controller just works with lead-acid batteries: OPEN, AGM, GEL, not for nickel hydride, lithium, or other batteries. -- Multiple protection: Build-in short-circuit protection, open-circuit protection, overcurrent protection, overload protection, safety for using. -- Widely use: Suitable for home, industrial, commercial, workshop etc. -- Easy to install and operate: Clearly indicate the status and data, can be conveniently switched modes and parameter configuration. -- LCD display: Large LCD display, easy to read the data. -- Function: Help to prolong the battery life cycle and keep the load work well. -- Application: Suitable for small solar energy system Features: 1.Build-in industrial micro controller. 2.Big LCD display,all adjustable parameter. 3.Fully 4-stage PWM charge management. 4.Build-in short-circuit protection,open-circuit protection,reverse protection,over-load protection. 5.Dual mosfet Reverse current protection ,low heat production. Connection: 1.Connect the battery to the charge regulator - plus and minus. 2.Connect the photovoltaic module to the regulator - plus and minus. 3. Connect the consumer to the charge regulator - plus and minus. The reverse order applies when deinstalling An improper sequence order can damage the controller Specification Voltage: DC 12V/24V Rated charge current: 10A / 20A /30A Floating charge voltage: 13.7V (adjustable) End-off voltage: 10.7V (adjustable) Discharge recover voltage: 12.6V (adjustable) USB output: 5V/3A Standby current: <10mA Operating temperature: -35-60 Size:134x70x33mm Material: ABS Warm tips: 1. Please keep it in cool and well ventilated place to maintain good heat dissipation. 2. Ensure your battery has enough voltage for the controller to recognize the battery before first installation. 3. The working temperature of this controller is -35C to 60C, please keep the controller stay in cool and well-ventilated place to maintain good heat dissipation during the summer day. Notes: 1. Please allowed 1-3mm differences due to manual measurement, thank you 2. Due to the difference between different monitors, please understand that the picture may not reflect the actual color of the item.