Features Main Control Chip: Industrial grade main control chip, complete 3 stage charging management, backflow resistance circuit, ultra low heat With industrial-grade main control chip and complete 3-level charge management, dual usb solar charge controller has strong practicability in industrial and other fields Coming with large-screen LCD display, lcd solar controller can observe accumulated power generation and discharge power query, temperature display and other information With light control + delay control, adjustable charging and discharging parameters, power-off memory and other functions, solar charger regulator is widely used and can meet different needs Dual USB Output: The solar charge controller with dual USB output, maximum current up to 2.5A, support for iPhone charging Dual USB output design of pwm charge controller, with self-recovery built-in overcurrent, short-circuit protection, open-circuit protection, reverse connection protection, etc., to extend service life Specification: Item Type: Dual USB Solar Charge Controller Material: ABS Model: K1688 Colour: Black System Voltage: 12V/24V Automatic Adaptation Maximum Photovoltaic Voltage: 50V USB Output: 2 USB outputs, 5V/2.5A (Maximum) Boost Charging Voltage: 14.4V Floating Voltage: 13.7V (Default Value, Adjustable) Discharge Cut off Voltage: 10.7V (Default Value, Adjustable) Discharge Recovery Voltage: 12.6V (Default Value, Adjustable) Charging Recovery Voltage: 13V Standby Current: <10mA Working Temperature: -35~+60℃Maximum Photovoltaic Input Power 10A20A30ARated Voltage 12V/24V 130W(12V)260W(24V)260W(12V)520W(24V)390W(12V)780W(24V) Package List: 1 x Controller  1 x English User Manual Note:Recommendations for safe use:1. This controller automatically recognizes 12V/24V. When installing for the first time, please make sure that the battery has enough voltage so that the controller can recognize the correct battery type.2. Install the controller as close to the battery as possible to avoid voltage drop caused by excessively long wires and affect normal voltage judgment.3. This controller is suitable for various batteries (including openings, seals, gels, etc.).4. This controller can only use photovoltaic panels as the charging source. Do not use DC or other power sources as the charging source.5. The controller will heat up when running, please pay attention to install the controller on a flat, well ventilated surface Package List 1 x Controller 1 x English User Manual