Feature: 1. Solar controller, 12V/24V automatic identification, ultra‑wide charge and discharge adjustable. 2. Can charge 3 kinds of batteries, lead‑acid, ternary lithium, and lithium iron phosphate batteries. 3. Support dual reverse current protection, low heat generation, stable performance. 4. With short circuit protection, open circuit protection, reverse connection protection, overload protection. 5. Support 2 USB outputs, maximum 5V/2A, rated charging current is 20A. Specification: Item Type: Solar Charge Controller Material: Plastic Weight: Approx. 151g / 5.3oz Product Size: Approx. 13.3x7cm / 5.2x2.8in System Voltage 12V/24V automatic recognition (no power storage function) Rated Charging Current 20A Rated Discharge Current 10A Battery Type Maximum Photovoltaic Voltage When the battery is 12V, the maximum voltage is 23V, when the battery is 24V, the maximum voltage is 46V Battery Type Lead-acid battery/lithium ion battery (ternary lithium)/lithium iron phosphate battery Charging Cut-Off Voltage Lead-Acid Batteries The default value is 14.4V (not adjustable) Ternary Lithium Battery The default value is 12.6V (not adjustable) Lithium Iron Phosphate Battery The default value is 14.6V (not adjustable) Discharge Recovery Voltage Lead-Acid Batteries The default value is 12.6V (adjustable 11.5V-13V) Ternary Lithium Battery The default value is 10.5V (adjustable 10V-11V) Lithium Iron Phosphate Battery The default value is 12.0V (adjustable 11.5V-12.5V) Discharge Cut-Off Voltage Lead-Acid Batteries The default value is 10.7V (adjustable from 9.5V to 11.5V) Ternary Lithium Battery The default value is 9.0V (adjustable from 8.5V to 9.5V) Lithium Iron Phosphate Battery The default value is 10.0V (adjustable from 9.5V to 10.5V) Float Voltage Lead-Acid Batteries The default value is 13.7V (adjustable from 13V to 15V) Ternary Lithium Battery The default value is 12.0V (adjustable 11.5V-12.5V) Lithium Iron Phosphate Battery The default value is 13.8V (adjustable from 13V to 14.5V) USB Output 2 USB Outputs, Maximum 5V/2A Stand-By Current <10mA Operating Temperature -35℃-+60℃ Please note that the voltage in the example is only for the 12V system, if you use the 24V system, please multiply by 2.. Package List: 1 x Solar Charge Controller1 x Manual Note: 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.