Features 1、Main Control Chip: Industrial grade main control chip, complete 3 stage charging management, backflow resistance circuit, ultra low heat generation 2、LCD Display: Large screen LCD display, charging and discharging current display, accumulative power generation and discharge power query, temperature display 3、Light Control + Delay Control: With light control + delay control, adjustable charging and discharging parameters, with functions such as power off memory 4、Dual USB Output: The solar charge controller with dual USB output, maximum current up to 2.5A, support for iPhone charging 5、Self Recovery Type: Built in over current, short circuit protection, open circuit protection, reverse connection protection, all self recovery, non damage to the controller 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 10A 20A 30A Rated 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