The module is a step-down power supply that can only but not step up, and the input voltage must be higher than the output voltage. The current detection of the module is a low-end detection. Please do not directly short-circuit the negative pole of the input and the negative pole of the output with a wire. The short-circuited negative power supply not have a constant current, which cause damage to the power supply and electrical equipment that requires constant current. The module adopts a step-by-step rectification scheme, which has extremely high efficiency, and the highest efficiency is as high as 96%. The output voltage and current are continuously adjustable. The input voltage can reach up to 95V, and the output voltage can reach up to 90V. There is an input anti-reverse connection, and the positive and negative connections not burn. With soft switch. Output current adjustment: set the multimeter or ammeter to 20A or 10A current position, adjust the power supply voltage to 5V, turn the constant current potentiometer counterclockwise for about 10 turns, adjust the current to the minimum, use the multimeter to short-circuit the output, and then adjust clockwise The potentiometer adjusts the current to the required current value; Conversion efficiency: up to 96% (efficiency is related to input and output voltage, current, and differential pressure); Short circuit protection: yes (constant current protection); Input reverse connection protection: Yes (MOS tube reverse connection). Output anti-backfeed: None (to charge the battery, the output is connected to an inductive load, such as an anti-backfeed diode must be added to the motor), Manufacturer: Akfldms