ZK-SJ30 700W MPPT Buck Boost Power Supply Module Adjustable DC Automatic Voltage Regulation Converter Solar Charging

Specification:
Model: ZK-SJ30
Power Output: Maximum 700W
Input Voltage Range: DC 6-80V
Output Voltage Range: DC 1.3-78V adjustable
Output Current Regulation: 0-30A adjustable
Measurement Accuracy: Voltage ±0.1V, Current ±0.03A

Features:
1. MPPT (Maximum Power Tracking) technology for optimized solar charging.
2. Adjustable output voltage and current for customized operation.
3. Real-time LCD display for monitoring input/output voltage, current, and power.
4. Overpower protection to avoid excess power output (max 700W with OPP display).
5. Integrated low internal resistance MOSFET for efficient heat dissipation.
6. Anti-backflow function eliminates the need for additional diodes during battery usage.

Package Includes:
1 x ZK-SJ30 Power Converter Module

Charging steps of solar cell: 1. Measure the no-load voltage of the solar panel(with sufficient sunlight), calculate the MPPT voltage=0.75*no-load voltage, or directly check the Vmp parameter value of the manufacturer's panel. Note that the positive and negative electrodes shall not be connected reversely. 2. The solar panel access module supplies power, switches to the MPPT voltage display interface, adjusts the MPPT potentiometer, and adjusts the value to Vmp voltage. 3. Rotate the CV potentiometer to adjust the output voltage (the size is the floating charge voltage of the charged pool). 4. Short circuit the positive and negative terminals of the output, rotate the CC potentiometer, and adjust the limit current size(which is the allowable charging current of the charged pool). If the power of the solar panel is too small, the MPPT light will light up when there is a short circuit. In order to maintain a constant input voltage, the output current will be limited, and the current can only be reduced. The current value seen when the MPPT light is off is meaningful. It is recommended to choose sufficient sunlight or adjust the current when using a constant voltage source as input. 5. Connect the battery for charging(note that the positive and negative electrodes should not be connected reversely). The MPPT potentiometer can be properly adjusted so that the module is always at the maximum power output.

Notes and Reminders: 1. The input positive and negative poles cannot be connected reversely, or they will be burned; 2. When the output terminal is connected to the battery, the positive and negative electrodes must not be reversed, otherwise they will be burned. 3. The maximum output current of 30A is only limited to when the difference between input voltage and output voltage is small, and the output power does not exceed 700W. The greater the difference between input and output voltage, the lower the conversion efficiency and the more serious the heating. If the heating is too serious, please reduce the power for use, or add a12V fan(with reserved interface and fan current less than 200mA) to assist in heat dissipation. 4. The MPPT voltage is usually set to 0.75 times the open circuit voltage of the solar panel.You can also refer to the nameplate or consult the solar panel manufacturer＇s Vmp voltage value, which is the MPPT voltage we want to set. The display screen can display the set voltage, which is easy to adjust. 5. The output current limiting(CC) value is generally the allowable charging current of the rechargeable battery. The current setting method is: short-circuit the output terminal directly with a wire, and adjust the CC potentiometer by looking at the current display value. The displayed value is the current limiting value(maximum output current value). 6. The product itself has the anti reverse function, and the output end of the charging pool does not need to be connected with the antireverse diode.