Feature: 1. [DUAL USB PORT] The load can be set to work mode, dual USB ports adjustable power rate, USB output up to 5V, 2.5A. 2. [MICRO PROCESSOR] This solar charger controller is equipped with an industrial grade microprocessor to control the charging and discharging process with stable performance. 3. [CLEAR DISPLAY SCREEN] The solar controller comes with a backlit display that clearly indicates status and data, and allows easy switching of modes and parameter configuration. 4. [MULTIPLE PROTECTION] Solar controller comes with short circuit protection, open circuit protection, reverse protection, overload protection, safer to use. 5. [AUTOMATIC IDENTIFICATION] The solar controller is rated at 12V, 24V and can be automatically identified for easy use and installation. Specification: Item Type: PWM Solar Controller Material: ABS Use: Applicable to home, industry, commerce, etc. Rated Voltage: 12, 24V Automatic identification Rated Discharge Current: 10A Maximum PV Voltage: Up to 23V for 12V battery Up to 46V for 24V battery Battery Type: B1=acid battery 12V,24V battery automatic identification B2=Lithium ion battery (lithium battery) 3 strings of 3.7V=11.1V B3=Lithium iron phosphate battery 4 strings of 3.2V=12.8V 12V Charging Cutoff Voltage: 14.4V (B1) 12.6V (B2) 14.6V (B3) (red font is for 12V, parameter multiplied by 2 for 24V) 24V Charging Cutoff Voltage: 28.8V (B1) 12.6V (B2) 14.6V (B3) 12V Discharge Cutoff Voltage: 10.7V (B1) 9V (B2) 10V (B3) 24V Discharge Cutoff Voltage: 21.4V (B1) 9V (B2) 10V (B3) 12V Discharge Recovery Voltage: 12.6V (B1) 10.5V (B2) 12V (B3) 24V Discharge Recovery Voltage: 25.2V (B1) 10.5V (B2) 12V (B3) 12V Light Control On Light Threshold: PV panel 8V (light control on light with delay) 24V Light Control On Threshold: PV panel 16V (light control on with delay) 12V Light Control Off Threshold: PV panel 8V (light control off with delay) 24V Light Control Off Threshold: PV panel 16V (light control off with delay) USB Output: 2 way USB output, 5V/2.5A (maximum) Standby Current: