Item Type: Solar Battery Charge Controller Product Size: Approx. 120 x 80 x 40mm / 4.72 x 3.15 x 1.57in Efficiency: 95% Noise: Check before installation:1. Check whether the appearance is in good condition before installation2. Check the label on the MPPT controller housing to verify that the performance of the specification MPTT controller matches the device.3. The MPPT controller should be fixed on an iron or metal bracket to avoid the vibration of the machine due to instability.4. The MPPT controller should leave a certain space around the casing for installation.5. The output and input wires should be as short as possible to avoid excessive energy consumption during transmission.6. There is high voltage and high current in the machine, and non& 8209;professionals are not allowed to disassemble it.7. Input and output terminals should be reliable and not loose to avoid heating at the connection point.8. The product is not a smooth, unpolished controller made directly from materials. 1REAL TIME TRACKING FUNCTION: MPPT type is suitable for solar panels of different voltages, with high efficiency MPPT real time tracking 2HIGH CONVERSION EFFICIENCY: High efficiency synchronous rectifier circuit structure is adopted, which has high conversion efficiency in low power charging environment 3VOLTAGE ADJUSTABLE AND WATERPROOF: Output voltage is adjustable, support acid and lithium batteries, etc. Waterproof, dustproof, shockproof 4MULTIPLE 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 5WIDE 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