Features 【PWM】Solar controller adopts industrial-grade main control chip to realize complete three-stage charging management, with ultra-low heat generation and reverse current resistance circuit. 【INTELLIGENT LCD】Solar panel regulator is equipped with a large LCD display, which can show the charging and discharging current, cumulative power generation and discharging power query, as well as temperature display, real-time monitoring of the system status. 【AUTOMATIC ADJUSTMENT】Solar battery charger supports light control and time delay control, which can adjust the charging and discharging parameters, and has the function of power failure memory, which can automatically adjust the working mode according to the ambient light. 【DUAL USB】Solar panel charger is equipped with two USB output ports, the maximum output current can be up to 2.5A, suitable for charging phone and other devices. 【COMPREHENSIVE PROTECTION】Solar energy controller case is made of ABS material with good heat and shock resistance, built-in overcurrent, short circuit, open circuit and reverse connection protection mechanism. Features:【PWM】Solar  controller adopts industrial-grade main control chip to realize complete three-stage charging management, with ultra-low heat generation and reverse current resistance circuit. Specification:Item Type: Dual USB Solar  ControllerMaterial: ABSModel: K1688Colour: BlackSystem Voltage: 12V/24V Automatic AdaptationMaximum Photovoltaic Voltage: 50VUSB Output: 2 USB outputs, 5V/2.5A (Maximum)Boost Charging Voltage: 14.4VFloating 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: 13VStandby Current: <10mAWorking 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 Controller1 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