Features 1Automatic identification system voltage 12/24V auto recognition 2Humanized LCD displaying and double button operation of manmachine interface 3Reliable over voltage protection short circuit protection over load protection overcharge protection overdischarge protection 4Accurate temperature compensation correcting the charging and discharging voltage automatically improving the battery lifetime 5Solar panels battery solar charge controller positive poles are all connected together adopting negative MOSFET in circuit. Specification Features: Automatic identification system voltage 12/24V auto recognition. Humanized LCD displaying and double button operation of man-machine interface. Completed technical data for setup and modify. The load control mode can be selected the timer function can be reset for street light at night. Discharge capacity control. Working storage function: record the total run time of system record timers of error during running time record times of full charged battery. Reliable over voltage protection short circuit protection over load protection overcharge protection over-discharge protection. Accurate temperature compensation correcting the charging and discharging voltage automatically improving the battery lifetime. Roundly reverse connected protection. Solar panels battery solar charge controller positive poles are all connected together adopting negative MOSFET in circuit. Specifications:Current: 30A 50A 70A (optional)Rated Voltage: 12/24VUSB Output: 2.4A *2Over Charge Current(V): 13.7V/*2 24VOver Discharge Current(V): 10.5-11V/*2 24VTemperature Compensation: -3mv//cellEmpty Load Wastage: <45mALoop Voltage Drop: <200mvDisplay: LCD DisplayCharging Type: MPPTWaterproof Grade: IP32Material: PlasticColor: Black + OrangeSize: 17.5 * 14 * 4cm/6.9 * 5.5 * 1.6in(30A) 21 * 19.2 * 5.5cm/8.3 * 7.6 * 2.2in(50A) 22.8 * 20 * 5.5cm/9 * 7.9 * 2.2in(70A)Suitable for automobiles and motorcyclesor small household appliances.Package Weight: 480g-1284gPackage List:1 * Solar Charge Controller1 * User ManualNotes:1. The function of controller is to protect voltage overshoot and overplay.2. When the battery voltage is too low the controller stops the output; after the solar panel is charged the cell recovers to 12.6V.3. 12.6V is the recovery discharge voltage.4. The normal voltage of the controller is 10.7V to 13.7V. These two voltage fluctuations can be set manually.If you have trouble in use try adjusting the float voltage to 13.7V:First you need to press the MCU control button for about 3-4 seconds and then there will be a management interface on the screen.Second you must press the add button on the screen until the voltage reaches 13.7V.Finally you need to press the MCU control button again which will save the controller record data when the display does not flicker. Package List 1 * SolarChargeController1 * User Manual