Features: 1. Voltage of automatic identification system, automatic recognition 12/24 V. 2. Humanized LCD display and two-button operation of human-machine interface. 3. Supplemented technical data for configuration and modification. 4. You can choose the load control mode, the timer function can be reset for street lighting at night. 5. Control of discharge capacity. 6. Working storage function: save the total operating time of the system, save the error counters during the working time, save the times of full battery charge. 7. Reliable voltage protection, short circuit protection, overload protection, overcharge protection, over-discharge protection. 8. Accurate temperature compensation, automatic correction of charging and discharging voltage, improving battery life. 9. Security connected over and over again. 10. Solar panels, battery, positive poles of solar charging controller are connected to each other, adopting negative MOSFET in the circuit. Technical data: Current: 30A, 50A, 70A (optional) Rated voltage: 12/24 V USB output: 2,4 A * 2 Reload Current (V): 13,7 V/*2 24 V Excessive Discharge Current (V): 10,5-11 V/*2 24 V Temperature compensation: -3mv//cell Empty charge waste: < 45mA Loop voltage drop: < 200mv Display: LCD display Charging Type: MPPT Waterproof rating: IP32 Material: plastic Color: Black Orange Size: 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 cars and motorcycles or small household appliances. Package Weight: 480g-1284g List of packages: 1 * Solar Charging Controller 1 * User Manual 1. The function of the controller is to protect against over-adjustment and over-adjustment of voltage. 2. When the battery voltage is too low, the controller stops the output; after charging the solar panel, the cell recovers the voltage up to 12,6 V. 3. 12,6 V is the discharge voltage after regeneration. 4. The normal voltage of the controller is from 10,7 V to 13,7 V. These two voltage fluctuations can be set manually. If you have problems with use, try to set the float voltage to 13,7 V: First you need to press the MCU control button for about 3-4 seconds, then the management interface will appear on the screen. Secondly, you need to press the add button on the screen until the voltage reaches 13,7 V. Finally, press the MCU control button again, which will save the controller record data when the display does not flicker.