1. Introduction
This manual provides detailed instructions for the safe and effective operation of the Eujgoov DC Voltage Regulator, Model XY-6509. This device is designed for precise voltage and current regulation, featuring a digital display, MPPT solar charging capabilities, and a wide input/output range, making it suitable for various electronics projects and laboratory applications.
2. Safety Information
- Always ensure proper ventilation around the device to prevent overheating.
- Do not exceed the specified input voltage or output current limits. Refer to the Specifications section.
- Ensure all connections are secure before applying power. Loose connections can cause arcing or damage.
- Avoid contact with internal components when the device is powered on.
- Keep the device away from moisture, dust, and extreme temperatures.
- In case of malfunction, disconnect power immediately and consult the troubleshooting guide or contact support.
3. Product Overview
The Eujgoov XY-6509 is a versatile DC voltage regulator with a clear digital display and intuitive controls. Key features include:
- Wide input voltage range (12.00-72.00V) and adjustable output voltage (0-65.00V).
- Maximum output current of 9A and power of 585W.
- Digital display showing input/output voltage, current, temperature, power, energy capacity, runtime, and curves.
- Easy setting of voltage and current limits.
- High conversion efficiency (up to 95%).
- Supports MPPT solar charging technology.
- Includes a buzzer and gradual start-up capability.
3.1. Component Identification

This image displays the front panel of the XY-6509, highlighting the multi-color digital display, control buttons (VSET, SW, ISET), the rotary encoder for adjustments, and the output terminals (red for positive, black for negative).

This image shows the rear panel of the XY-6509, featuring the various input options including an XT60 connector (IN), a USB-C PD port, a DC barrel jack, and screw terminals for power input, along with the cooling fan.

This image illustrates the physical dimensions of the XY-6509, indicating a length of 111mm (4.37in), a width of 65mm (2.56in), and a height of 57mm (2.24in).
Front Panel Controls:
- VSET Button: Used to set the output voltage.
- SW Button: Toggles the output ON/OFF and switches display modes.
- ISET Button: Used to set the output current limit.
- Rotary Encoder: Adjusts values when setting voltage or current, and navigates menus. Pressing it confirms selections.
- Output Terminals: Red (+) and Black (-) terminals for connecting the load.
Rear Panel Connections:
- IN (XT60 Connector): Main input for high-current power sources.
- PD (USB-C Port): Power Delivery input for compatible USB-C power sources.
- DC (Barrel Jack): Standard DC barrel jack input.
- Screw Terminals: Alternative input terminals for bare wire connections.
- Cooling Fan: Automatically activates to dissipate heat during operation.
4. Specifications
| Parameter | Value |
|---|---|
| Model | XY-6509 |
| Input Voltage | 12.00V - 72.00V DC |
| Output Voltage | 0 - 65.00V DC |
| Output Current | 0 - 9.000A |
| Output Power | 585W (Maximum) |
| Voltage Accuracy | ±0.5% + 1 digit |
| Current Accuracy | ±0.5% + 3 digits |
| Voltage Resolution | 0.01V |
| Current Resolution | 0.001A |
| Conversion Efficiency | Approximately 95% |
| Screen Visible Area | Approx. 38x29mm (1.50x1.14in) |
| Data Storage Groups | 10 |
| Buzzer | Yes |
| Gentle Ramp-Up | Yes |
| MPPT Function | Supports MPPT solar charging |
| Output Ripplewave (Typical) | Vpp-150mV |
| Item Weight | 12.6 ounces |
| Package Dimensions | 5.91 x 4.33 x 2.76 inches |
5. Setup
- Power Input Connection:
- Choose an appropriate power source within the 12.00V to 72.00V DC range.
- Connect the power source to one of the input ports on the rear panel (XT60, USB-C PD, DC barrel jack, or screw terminals). Ensure correct polarity for DC connections.
- For solar charging, connect the solar panel to the input, ensuring its voltage is within the specified range.
- Load Output Connection:
- Connect your load to the output terminals on the front panel. The red terminal is positive (+), and the black terminal is negative (-).
- Ensure the load's voltage and current requirements are within the regulator's output capabilities.
- Initial Power On:
- Once input and output are securely connected, apply power to the input. The digital display should illuminate.
- The device will typically power on with the output OFF. Press the SW button to toggle the output ON.
6. Operating Instructions
6.1. Setting Output Voltage (VSET)
- Press the VSET button. The voltage display will start blinking.
- Turn the Rotary Encoder clockwise to increase the voltage or counter-clockwise to decrease it.
- Press the Rotary Encoder to confirm the setting. The display will stop blinking.
6.2. Setting Output Current Limit (ISET)
- Press the ISET button. The current display will start blinking.
- Turn the Rotary Encoder clockwise to increase the current limit or counter-clockwise to decrease it.
- Press the Rotary Encoder to confirm the setting. The display will stop blinking.
6.3. Toggling Output ON/OFF
Press the SW button briefly to toggle the output power ON or OFF. When the output is OFF, the display will show 'OFF'.
6.4. Display Modes
Press and hold the SW button to cycle through different display modes, which may include:
- Input Voltage / Output Voltage
- Output Current / Output Power
- Energy Capacity (Ah) / Runtime (h)
- Temperature / System Parameters
- Voltage and Current Curves
6.5. Data Storage Groups
The device supports 10 data storage groups. Consult the on-screen menu (accessed via rotary encoder press and hold, then rotate) for instructions on saving and recalling settings.
7. MPPT Solar Charging
The XY-6509 features Maximum Power Point Tracking (MPPT) functionality, optimizing power extraction from solar panels for efficient battery charging or direct power supply.
- Connect your solar panel to the input terminals, ensuring the panel's open-circuit voltage (Voc) is within the regulator's input voltage range (12.00V-72.00V).
- Connect the battery or load to the output terminals.
- The device will automatically detect the maximum power point of the solar panel and adjust its output to deliver optimal power to the load or battery.
- Monitor the display for real-time charging parameters, including input voltage from the panel, output voltage to the battery/load, and charging current.
8. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use abrasive cleaners or solvents.
- Ventilation: Ensure the cooling fan and ventilation slots are free from dust and obstructions. Periodically clean with compressed air if necessary.
- Storage: When not in use for extended periods, store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
9. Troubleshooting
- No Display/No Power:
- Check if the input power source is connected correctly and providing voltage within the specified range.
- Verify all input cables are securely connected.
- No Output Voltage/Current:
- Ensure the output is toggled ON using the SW button.
- Check if the output voltage setting is above 0V.
- Verify the current limit (ISET) is not set too low for the connected load.
- Check for short circuits or open circuits in the load connection.
- Overheating:
- Ensure adequate ventilation around the device.
- Check if the cooling fan is operating. If not, ensure it's not obstructed.
- Reduce the load or input voltage if the device consistently overheats.
- Inaccurate Readings:
- Ensure connections are tight and free from corrosion.
- Compare readings with a calibrated multimeter if accuracy is critical.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact Eujgoov customer service through the retailer where the product was acquired. Please have your model number (XY-6509) and purchase details ready when contacting support.





