<b>"Your Satisfaction is our Highest Priority", contact us firstly if you have any question</b><br><br> <b>Change the default setting of solar controller, requires:</b><br> 1. Disconnect the solar panel<br> 2. ensure the remain voltage of battery no less than 12V<br><br> <b>Note:</b><br> <1>Please keep it in cool and well ventilated place to maintain good heat dissipation<br> <2>the regulator is only suitable for lead acid batteries: OPEN, AGM, GEL, not for nickel hydride, lithium, ions, or other batteries.<br> <3>Make sure your battery has enough voltage for the controller to recognize the battery before first installation.<br> <4>Indoor use only: the working temperature of this controller is -35°C to +60°C, during hot sunny days, the temperature outside might go up to 60-75°C. <5>When the battery voltage is too low, the controller will stop output(≦ 8V, controller turn off itself, LCD is blank,≦ 10.7V, 12Voutput ports are not available); after the solar panels charging, the battery will return to 12.6 V. It is a natural to output.<br><br> <b>Specification:</b><br> *Voltage: DC 12V/24V<br> *Self-consuming: 10mA<br> *Rated Charge Current: 20A<br> *Rated Load Current: 20A<br> *Over Charge Protection: 14.4V/28.8V<br> *Over Charge Floating Charge: 13.7V/27.4V<br> *Charge Recover Voltage: 12.6V/25.2V<br> *Over Discharge Protection: 10.7V/21.4V<br> *Over Discharge Recover: 12.6V/25.2V<br> *USB Output: 5V/3A<br> *Operating Temperature: -35℃-60℃<br> *Size:150 * 78 * 35mm / 5.9 * 3 * 1.4in<br><br> <b>Warm Tips: Wire Range 26-12 AWG</b><br> <b>Package List: </b><br> 1 * Solar Charge Controller<br> 1 * User's Manual <br> <b>Warranty: </b>18-month product guarantee from ALLPOWERS