Walfront Solar Charge Controller User Manual

1. Introduction

This manual provides essential information for the safe and effective operation of your Walfront Solar Charge Controller. This device is designed to manage the power flow from your solar panel to your battery, ensuring optimal charging and protecting your battery from overcharge and over-discharge. It features an industrial micro-controller, full 3-stage PWM management, and a large LCD display for easy monitoring and parameter adjustment.

Figure 1: Front view of the Walfront Solar Charge Controller, showing the LCD display, control buttons, and USB ports.

2. Safety Information

Please read and understand all safety instructions before installation and operation to prevent injury or damage to the controller or battery.

• The regulator is only suitable for lead-acid batteries: OPEN, AGM, and GEL types. It is not suitable for NiMH, Li-ion, or other battery types.
• Ensure your battery has sufficient voltage for the controller to recognize the battery type before the initial installation.
• The battery cables should be as short as possible to minimize power loss.
• The controller is designed solely for regulating solar modules. Never connect another charging source to it.
• The controller may generate heat during operation. Install it in a well-ventilated area to ensure proper cooling.

3. Product Features

The Walfront Solar Charge Controller offers a range of features designed for efficient and safe solar power management:

• Industrial Micro-controller: Ensures stable operation in various environmental conditions (cold, hot, humid).
• Adjustable Parameters: Discharge parameters can be customized to suit specific battery requirements.
• Full 3-Stage PWM Management: Optimizes battery charging for extended battery life.
• Comprehensive Protections: Built-in safeguards against overcurrent, short circuit, open circuit, reverse connection, and overload.
• Large LCD Display: Provides clear, backlit real-time information on system status and parameters.
• MOSFET Reverse Current Protection: Minimizes heat generation and enhances safety.
• Dual USB Interface: Standard USB ports (5V/2A Max) compatible with most digital devices for convenient charging.

Figure 2: The solar charge controller featuring dual USB output ports for charging external devices.

4. Specifications

Note: All red voltage values are for a 12V system. For a 24V system, please double these values.

Figure 3: Dimensions of the Walfront Solar Charge Controller.

5. Setup and Installation

Follow these steps for proper installation of your solar charge controller:

1. Prepare Components: Ensure you have your solar panel, battery (12V/24V lead-acid: OPEN, AGM, or GEL), and appropriate cables.
2. Connect Battery First: Connect the battery to the charge controller's battery terminals. Ensure correct polarity (+ to + and - to -). The controller will detect the battery voltage (12V or 24V).
3. Connect Solar Panel: Connect the solar panel to the charge controller's solar panel terminals. Ensure correct polarity. The controller will begin charging the battery.
4. Connect Load (Optional): If you have a DC load, connect it to the load terminals on the controller. Ensure correct polarity.
5. Verify Connections: Double-check all connections for tightness and correct polarity before powering on the system. Loose connections can cause damage.

Important Considerations:

• Install the controller in a dry, well-ventilated area, away from direct sunlight and moisture.
• Ensure battery cables are as short as possible to minimize voltage drop.
• Do not connect any other charging source (e.g., AC charger, generator) directly to the controller's solar input terminals.

6. Operating Instructions

The Walfront Solar Charge Controller features an intuitive LCD display and control buttons for easy operation.

6.1. LCD Display

The LCD displays real-time system status, including battery voltage, charging current, discharge current, and various parameter settings. The backlight ensures visibility in low-light conditions.

6.2. Button Functions

• MENU Button: Press to cycle through different display modes and enter parameter setting mode.
• UP Button: Used to increase values or navigate up in menus.
• DOWN Button: Used to decrease values or navigate down in menus.

6.3. Parameter Adjustment

To adjust parameters such as Floating Charge Voltage, Discharge Stop Voltage, and Discharge Reconnect Voltage:

1. Press the MENU button until you reach the desired parameter setting.
2. Long-press the MENU button until the displayed value starts flashing.
3. Use the UP and DOWN buttons to adjust the value.
4. Press the MENU button again to confirm the setting and exit the adjustment mode.

Remember that all red voltage values displayed are for a 12V system. If you are using a 24V system, these values should be doubled for accurate interpretation and setting.

7. Maintenance

Regular maintenance ensures the longevity and optimal performance of your solar charge controller.

• Cleanliness: Keep the controller clean and free from dust and debris. Use a dry, soft cloth for cleaning.
• Ventilation: Ensure the installation area remains well-ventilated to prevent overheating, especially during periods of high current flow.
• Connection Checks: Periodically inspect all wiring connections to ensure they are secure and free from corrosion. Loose connections can lead to power loss or damage.
• Environmental Conditions: While designed for various environments, avoid exposing the controller to extreme temperatures or direct water contact.

8. Troubleshooting

This section addresses common issues you might encounter with your solar charge controller.

9. Warranty and Support

For warranty information and technical support, please refer to the documentation included with your purchase or visit the official Walfront website. Keep your purchase receipt as proof of purchase for any warranty claims.

If you encounter issues not covered in this manual, please contact Walfront customer service for assistance.