[ Advanced MPPT Algorithm]The innovative Max Power Point Technology allows to deliver high tracking efficiency of up to 99% and conversion efficiency of 98%, improve approximately 20%-30% utilization rate of solar panel system than regular PWM controller. It is the best charging solution even in couldy days to get maximized solar panel production. [ Full System Protections]Built-in multiple protections like PV over-voltage, battery over-voltage, over-temperature, over-charging, short-circuit, reverse polarity, and temperature compensation for your battery, to safegurad your battery to be , efficiently to 100%. [ Multiple 12V/24V Batteries]Designed for 12 volt and 24 volt sealed lead-acid automotive, marine, RV, powersport, and deep-cycle batteries, including flooded, gel, , , VRLA and maintenance-free, plus lithium-ion batteries (lifepo4). CM-D20: Rated Charge Current: 20A Rated Discharge Current: 20A System Voltage: 12V/24V Auto Max Solar Input Voltage: 50V VOC Max PV System Input Power: 240W (12V), 480W (24V) USB Output: 5V 3A Color: As Shown Material: ABS Package Contents: 1X MPPT Solar Charge Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.