Description If you are still looking for a professionalsolar charge controller, please take a look at this product. Our product is 12/24V 20A USB 5V MPPTsolar battery controller. It has safety protection, strong adaptability and long battery life advantages. And it has maximum power point solar charging that gets more energy to your battery bank. Features -System Voltage :12V/24V (Self-adaptation)-Rated Charging Current :20A-MPPT Tracking Efficiency: Max.99%-Overload, Short Circuit Protection: 1.5 Times Rated Current-No-Load Loss: <10mA-Overpressure Protection: 16V, X2/24V-Charging Cut-Off Voltage: 14.7V, X2/24V-Discharge Recovery Voltage: 12.0V, X2/24V-Discharge Cut-Off Voltage: 10.8V, X2/24V-USB Output: 5V 1A-Operating Temperature: -35 ~+55 -Color:As Shown-Material:ABS-Size:13.10X9.95X2.95cm/5.15X3.91X1.16inUsing single-chip microcomputer control, this solar charge controller has the advantages of intelligence and strong adaptability.With USB output, this solar panel battery controller can meet the charging requirements of digital products.Adopting MPPT maximum power point tracking technology, this solar charge regulator can work at the power point of the I-V curve.The solar panel charge controller hasautomatic system recognition, which can intuitively understand of the working status of controller.Thanks to its over charging, over discharging, overload, short circuit and reverse polarity protection, etc., this solar battery controller is safe for you. Packing list: 1 x Solar Charge Controller