300W Auto Step Up/Down Power Supply Converter Module Solar Panel

Parameter Input voltage range: DC7-80V Output voltage range: DC1.4-79V Voltage display range: 1.40-80.00V (accuracy ±0.1V or so) Output current adjustment range: 0-20A Current display range: 0.00A-20.00A (accuracy ±0.03A or so) Adjustment knob: MPPT voltage adjustment, output voltage adjustment, output current limiting adjustment. MPPT function: Yes Anti-backflow: Battery backflow will not burn, when the sun is not enough charging current, there will be 0.5-40mA backflow current, it is recommended to connect the diode when charging. diode. Constant current (current limiting): Yes Over power protection: 300W, exceeding the power will shut down the output, display OPP Size: 108x64x48mm Weight: Product weight: with display 208g 194g without display Weight with package:238g with display Without display 224g Applications: solar charging, lithium battery charging, LED constant current driver, voltage regulator power supply Solar battery charging steps -ZK-SJ20-- 1. Measure the solar panel no-load voltage (sunny), calculate the MPPT voltage = 0.75 * no-load voltage, or directly look at the manufacturer's battery panel Vmp parameter value. Be careful not to reverse the positive and negative poles. 2. Solar panel access module power supply, switch to display MPPT voltage interface, adjust the MPPT potentiometer, the value is adjusted to Vmp voltage. 3. Rotate the CV potentiometer to adjust the size of the output voltage (the size of the float voltage of the battery being charged). Short the output positive and negative terminals, rotate the CC potentiometer to adjust the limiting current size (the size is the allowable charging current of the battery being charged). 4. If the solar panel power is too small, the MPPT lamp will light up when short-circuiting, in order to keep the input constant voltage, the output current will be limited, the current can only be adjusted downwards, the current value seen when the MPPT lamp is off is meaningful. It is recommended to adjust the current when choosing full sunlight or using a constant voltage source as input. 5. Connect the battery to charge (be careful not to reverse the positive and negative poles). You can adjust the MPPT potentiometer appropriately, so that the module is always at the maximum power point output. It is recommended to connect a diode to completely prevent backflow. The module can be connected to a diode to completely prevent backflow, Attention and reminders 1. Input positive and negative poles can not be reversed, otherwise it will burn. 2. When the output is connected to the battery, the positive and negative poles can not be reversed, otherwise it will burn. 3. The maximum output current of 20A is limited to the time when the voltage difference between input voltage and output voltage is small, and the output power does not exceed 300W. The larger the voltage difference between input and output voltage, the lower the conversion efficiency and the more serious the heat generation. When the heat is too serious, please reduce the power to use, or add a 5V fan (with a reserved interface, fan current less than 300mA) to assist in heat dissipation. 4.MPPT voltage is generally set to 0.75 times the open circuit voltage of the solar panel, you can also look at the nameplate or consult the solar panel manufacturer Vmp voltage value, Vmp voltage value is the MPPT voltage we want to set. The display can show the set voltage, adjustment at a glance, very convenient. 5. Output current limiting (CC) value, generally the allowable charging current of the rechargeable battery, the current is set as follows: short-circuit the output directly with a wire, look at the current display value to adjust the CC potentiometer, the display value that is the current limiting value (maximum output current value). Package Included: 1PCS 300W Auto Step Up Step Down Power Supply Module

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