Features: and high quality Large-screen LCD display, adjustable charge and discharge parameters, with power-off memory function Uses industrial-grade master chip Complete 3-stage PWM charging management Dual USB output, maximum current up to 25A, supports mobile phone charging Dual MOS anti-backflow circuit, ultra-low heat Built-in over-current, short-circuit protection, open-circuit protection, reverse connection protection; all self-healing and do not damage the controller Package Includes: 1 x Solar Charge Controller Specifications: Material: ABS Current Type: 10A/20A/30A/40A/50A/60A Size: Approx. 133.5 x 70mm / 5.26 x 2.76 inch System Voltage: 12V-24V Maximum Photovoltaic Voltage: 23V for 12V battery; 46V for 24V battery Battery Type: B1 = Automatic identification of lead-acid battery 12V/24V B2 = Lithium-ion battery 3 strings 3.7V = 11.1V B3 = 4 strings lithium iron phosphate battery 3.2V = 12.8V Charging Cut-off Voltage: 14.4V (B1), 12.6V (B2), 14.6V (B3) Discharge Cut-off Voltage: 10.7V (B1), 9V (B2), 10V (B3) Discharge Recovery Voltage: 12.6V (B1), 10.5V (B2), 12V (B3) Light Control Turn-on Threshold: Photovoltaic Panel 8V (with delay) Light Control Turn-off Threshold: Photovoltaic Panel 8V (with delay) USB Output: 2 USB outputs, 5V/2.5A (maximum) Standby Current: Low power consumption