Features EASY ADJUSTMENT: The current buck boost converter adjustment knob can be used to adjust MPPT voltage, output voltage and limit output current, very simple STABLE WORK: Automatic current buck boost converter chip has enhanced heat dissipation. Good heat dissipation performance ensure stable working performance under high power, very efficient and reliable PRACTICAL USE: Booster buck converter is widely used in solar charging, battery lithium charging, LED constant current drive, voltage regulator and so on BETTER DISPLAY: Solar car charging MPPT module support MPPT regulation voltage real time control, lift converter operation is very simple, useful and practical VOLTAGE AND POWER: Power supply voltage regulator has automatic wide voltages of DC6~80V to DC1.3~78V, over power protection 700W, over power will turn off the output Spec: Item Type: Current Buck Boost Converter Model: ZK SJ30 Output Current Adjustment Range: 0 - 30A MPPT Function: Yes(requires external fan for high current usage) Prevent Backflow: Yes(no diode required when connecting to battery) Constant Current(current limit): Yes Overpower Protection: 700W(output shut off and display opp when power exceed limit) Application: Solar charging, storage battery lithium battery charging, LED constant current driver, regulated power supply How to Use: Step 1: Measure the open circuit voltage of the solar panel under abundant sunlight and calculate the MPPT voltage as follows: MPPT voltage = 0.75 x open circuit voltage, or refer to the Vmp parameter provided by the solar panel manufacturer. (ensure correct polarity.) Step 2: Connect the solar panel to the module for power supply and adjust the MPPT potentiometer until the voltage reaches the Vmp value. Step 3: Adjust the output voltage using the CV potentiometer to match the float charging voltage of the battery being charged. Package List: 1 x Current Buck Boost Converter Package List 1 x Current Buck Boost Converter