Feature: 1. REAL TIME TRACKING FUNCTION: MPPT type is suitable for solar panels of different voltages, with high efficiency MPPT real time tracking 2.HIGH CONVERSION EFFICIENCY: High efficiency synchronous rectifier circuit structure is adopted, which has high conversion efficiency in low power charging environment 3.VOLTAGE ADJUSTABLE AND WATERPROOF: Output voltage is adjustable, support acid and lithium batteries, etc. Waterproof, dustproof, shockproof 4.MULTIPLE PROTECTIONS: Voltage and current LED display, efficiency is more than or equal to 95%, with short circuit protection, over temperature protection, and under voltage protection WIDE RANGE OF USES: Suitable for solar street light controllers, solar chargers, solar electric bicycle, solar electric tricycles, solar toy cars, household solar panels, solar monitoring and other usage scenarios Specification: Item Type: Solar Battery Charge Controller Product Size: Approx. 120 x 80 x 40mm x 4.72 x 3.15 x 1.57in &ge; 95% Noise: <55dB Uses: solar street light controllers, solar chargers, solar electric bicycle, solar electric tricycles, solar toy cars, household solar panels, solar monitoring and other usage scenarios Weight: 485 g to 17.1 oz(approximate.) 1.OVERHEATING PROTECTION When the internal temperature of the MPPT controller exceeds 100, the MPPT controller will reduce the output power. If the internal temperature continues to rise to 110, the MPPT controller will automatically turn off the output. When the internal temperature of the MPPT controller is lower than 85, the MPPT controller will automatically resume operation. 2.SHORT CIRCUIT PROTECTION When an unexpected short circuit occurs in the MPPT controller output, the MPPT controller automatically turns off the output and automatically returns to normal after the short circuit removed. 3. INPUT UNDERFOLLOWING PROTECTION When the input voltage of the MPPT controller is lower than 15V, the MPPT will protectively shut down and automatically resumes operation after the input voltage is normal. 4.OUTPUT ACTIVATE FUNCTION SETTING When the MPPT controller leaves the factory, the output voltage activate function is on. That is, when the output terminal is suspended, the voltage output closed, and the output voltage shows "0" flashing. When battery access detected, the output is automatically activated and the current charging voltage displayed. When the output activation function is not required in some specific applications, the user can press the [OK] key five times to turn off the activation function. At this time, the output voltage column will display "OPE" for 3 seconds, indicating that the operation is successful. In this way, the MPPT controller will output voltage directly after power on. If you need to restart the output activation function, press the [OK] key five times again to turn on the output activation function. At this time, the output voltage column will display "act" for 3 seconds, indicating that the operation is successful. After the output activation function is set, the system will save it automatically, and it will work according to the mode set last time when power on again. Package List: 1 x Solar Battery Charge Controller 1 x User Manual