Features Large-screen LCD display, charge and discharge parameters can be adjusted, with power-off memory function. With short circuit protection, reverse connection protection, overload protection. Dual USB output, maximum current 2A, support for mobile phone charging. Full three-stage PWM charge management with ambient temperature display. Built-in industrial microchip controller for higher performance. Specification:Item Type:Solar Charge Controller System Voltage:12V/24V Automatic Charging Mode: PWM Rated Charging Current: 20A Rated Discharge Current: 10A Maximum Solar Input: Maximum Input 23V at 12V, Maximum 46V at 24V Battery Over Voltage Protection: 16.5V(At 12V system,doubled at 24V system) Equalizer: 14.4V(At 12V system,doubled at 24V system) Floating Charge Voltage: 13.8V (Default,Adjustable)(At 12V system,doubled at 24V system) Undervoltage Protection Voltage: 11.0V (Default,Adjustable)(At 12V system,doubled at 24V system) Undervoltage Recovery Voltage: 12.6V (Default,Adjustable)(At 12V system,doubled at 24V system) Light-on Voltage: 8V solar panel (On Delay) (At 12V system,doubled at 24V system) Shutdown Voltage:Solar panel 8V (Off Delay)(At 12V system,doubled at 24V system) Terminal Size: 20-10AWG Standby Current: <12mA Working Temperature: -35℃ ~ +60℃ Waterproof Rating: IP32 Size:168 x 92 x 42mm / 6.61 x 3.62 x 1.65in  Package List:1 x Controller1 x Users Manual Note:Please read the instruction carefully before installation and use!!! Package List 1 x Controller 1 x Users Manual