Features: Automatic identification system voltage, 12/24V automatic recognition. Humanized LCD display and two buttons human-machine interface support. Supplemented technical data for configuration and modification. You can choose load control mode, timer function can be reset for street lighting at night. Discharge performance control. Operation storage function: records the total system time, records error counters during operation, records the times of fully charged battery. Reliable overvoltage protection, short circuit protection, overload protection, overcharge protection, over-discharge protection. Accurate temperature compensation, automatically correcting charge and discharge voltage, improving battery life. Round reverse protection connection. Solar panels, battery, solar charge controller positive poles are connected to each other, adopting negative MOSFET in circuit. Technical data: Current: 30A, 50A, 70A (optional) Rated voltage: 12/24 V USB output: 2,4 A,2 Over charging current (V): 13,7 V /;2 24 V Over discharge current (V): 10,5-11 V/*2 24 V Temperature compensation: -3mv//cell Empty charge losses: Package list: 1