Feature 1、Automatic identification system voltage, 12/24V auto recognition 2、Humanized LCD displaying and double button operation of man-machine interface 3、Reliable over voltage protection, short circuit protection, over load protection, overcharge protection, over-discharge protection 4、Accurate temperature compensation, correcting the charging and discharging voltage automatically, improving the battery lifetime 5、Solar panels, battery, solar charge controller positive poles are all connected together, adopting negative MOSFET in series control circuit.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. High efficiency intelligent MPPT 3-stage charging mode. The load control mode can be selected, the timer function can be reset for street light at night. Discharge capacity control. Discharge counter of ampere hour. 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 series control circuit. Specifications: Current: 30A, 50A, 70A (optional) Rated Voltage: 12/24V USB Output: 2.4A *2 Over Charge Current(V): 13.7V/*2 24V Over Discharge Current(V): 10.5-11V/*2 24V Temperature Compensation: -3mv/℃/cell Empty Load Wastage: