Feature: 1. Solar charge controller, 12V/24V automatic identification, no power storage function. 2. Supports charging of lead‑acid, ternary lithium, and lithium iron phosphate batteries. 3. With dual reverse current protection, low heat generation, extend battery life. 4. Support short circuit protection, open circuit protection, reverse connection protection, overload protection. 5. With ultra-wide charge and discharge adjustable, 2 USB outputs, maximum 5V/2A. Specification: Item Type: Solar Charge Controller Material: Plastic Weight: Approx. 155g / 5.5oz Product Size: Approx. 13.3x7cm / 5.2x2.8in System Voltage 12V/24V automatic recognition (no power storage function) Rated Charging Current 50A Rated Discharge Current 20A 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