Item Type: Solar Charge Controller Material: Aluminum 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 installation; 2. 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 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. The product is not a smooth model, the controller is produced directly from raw materials without polishing. 1Smart Charging: High efficiency MPPT real time tracking function, suitable for solar panels of different voltage. 2Better Designs: Adopting efficient synchronous rectifier circuit structure to ensures quick and stable charging. 3Great Matching: 10-30V adjustable output voltage supports various batteries, enables a wide range of application. 4Working Safety: With short circuit protection, over temperature protection, under voltage protection for safety. 5Reliable Using: Equipped with LED screen to display volt and current, also waterproof, dust proof and shock proof.