1. Introduction
This manual provides essential information for the safe and efficient operation of your ECGSOLAX PWM Solar Charge Controller. This controller is designed to manage the charging process from solar panels to various battery types, ensuring optimal performance and extending battery life. It is suitable for 12V/24V solar systems and supports lead-acid, lithium-ion (3 strings of 11.1V), and lithium iron phosphate (4 strings of 12.8V) batteries. Please read this manual thoroughly before installation and use.
2. Safety Information
Please observe the following safety precautions during installation and operation:
- Ensure all connections are correct and secure before powering on the system.
- Do not connect the solar controller to any power source other than solar panels and the specified battery types.
- Always connect the battery first, then the solar panel, and finally the load. Disconnect in the reverse order.
- Avoid short-circuiting the solar panel, battery, or load terminals.
- Install the controller in a well-ventilated area, away from flammable materials and direct sunlight.
- This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
3. Product Overview
The ECGSOLAX PWM Solar Charge Controller features a robust design with an industrial microcontroller for reliable performance. Key features include:
- Large LCD display for easy monitoring of system parameters.
- Fully 3-stage PWM charge management for efficient battery charging.
- Comprehensive protection features: short-circuit, open-circuit, reverse polarity, and overload protection.
- Dual USB 5V/2.5A output for charging mobile devices.
- Dual MOSFET reverse current protection for low heat production.
- Light and timer control functions for automated load management.
4. Setup and Installation
Follow these steps for proper installation of your solar charge controller:
- Prepare Wiring: Ensure all wires are of appropriate gauge for your system's current and length. Strip insulation approximately 8-10mm from wire ends.
- Connect Battery: Connect the battery to the controller's battery terminals (marked with a battery symbol). Ensure correct polarity (+ to + and - to -). The controller will automatically detect 12V or 24V.
- Connect Solar Panel: Connect the solar panel to the controller's solar panel terminals (marked with a solar panel symbol). Ensure correct polarity.
- Connect Load: Connect your DC loads to the controller's load terminals (marked with a light bulb symbol). Ensure correct polarity.
- Secure Connections: Double-check all connections for tightness and correct polarity.
Important: Always connect the battery first, then the solar panel, and finally the load. Disconnect in the reverse order: load, then solar panel, then battery.
5. Operating Instructions
The controller features an LCD display and three buttons for operation:
- LCD Display: Shows real-time voltage, charge status, load status, and other parameters.
- Buttons: Used for navigating menus and adjusting settings. The labels on the controller indicate 'MCU control', 'SET voltage', 'Build-in timer', and 'FULL protect' which correspond to various parameter adjustments and monitoring functions.
5.1. Parameter Settings
The controller allows adjustment of various parameters to optimize charging for different battery types and load control. Refer to the specifications table for default values. Specific instructions for entering and modifying settings are typically found in the detailed product manual (PDF, if available) or by pressing and holding the 'SET' button to enter programming mode.
5.2. Load Control Function
The controller supports light and timer control for connected DC loads. This allows for automated switching of loads based on daylight and predefined time settings. Consult the detailed manual for programming specific light and timer schedules.
5.3. USB Output
The dual USB ports provide a 5V/2.5A output for charging small electronic devices. These ports are active when the battery has sufficient charge.
6. Battery Types and Settings
The controller is compatible with the following battery types. Ensure the correct battery type is selected in the controller settings for optimal charging and protection.
| Parameter | Lead-acid (B1) | Li-ion (B2) | LiFePO4 (B3) |
|---|---|---|---|
| Battery Type | 12V/24V Auto | 3 Strings 3.7V=11.1V | 4 Strings 3.2V=12.8V |
| Equalization | 14.4V | 12.6V | 14.6V |
| Discharge stop | 10.7V | 9V | 10V |
| Discharge reconnect | 12.6V | 10.5V | 12V |
7. Troubleshooting
If you encounter issues with your solar charge controller, refer to the following common problems and solutions:
- No Display/No Power: Check battery connections and ensure the battery has sufficient charge. Verify solar panel connections.
- Battery Not Charging: Ensure solar panels are receiving adequate sunlight. Check solar panel and battery connections for correct polarity and tightness. Verify the selected battery type matches your installed battery.
- Load Not Working: Check load connections and ensure the load is not exceeding the controller's rated current. Verify the load control settings (light/timer function). Ensure the battery has sufficient charge.
- Overload Protection Triggered: Reduce the connected load. The controller will automatically resume operation once the overload is removed.
- Short-Circuit Protection Triggered: Disconnect all components, identify and fix the short circuit in the wiring or load, then reconnect in the proper sequence.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | PWM Solar Charge Controller (RBL-10A-Li, RBL-20A-Li, RBL-30A-Li) |
| Brand Name | ECGSOLAX |
| Application | Solar System Controller |
| Maximum Current | 10A / 20A / 30A (model dependent) |
| Battery Voltage | 12V / 24V Auto |
| MAX Solar Input | 23V (for 12V battery), 46V (for 24V battery) |
| USB Output | Dual USB, 5V/2.5A (MAX) |
| Function | Light and timer Control |
| Self-consume | <10mA |
| Operating Temperature | -35℃ to 60℃ |
| Size / Weight | 133.5 * 70 * 35mm / 165g |
| Certification | CE |
| Origin | Mainland China |
9. Maintenance
To ensure the longevity and optimal performance of your solar charge controller, follow these maintenance guidelines:
- Regular Cleaning: Keep the controller clean and free from dust and debris. Use a dry cloth to wipe the surface.
- Check Connections: Periodically inspect all wiring connections to ensure they are tight and free from corrosion. Loose connections can lead to power loss or overheating.
- Ventilation: Ensure the installation area remains well-ventilated to prevent overheating of the controller.
- Battery Health: Monitor your battery's health and voltage regularly. Replace batteries when they no longer hold a charge effectively.
10. User Tips
- For optimal battery life, ensure the correct battery type is selected in the controller settings.
- Consider adding an inline fuse between the solar panel and the controller, and between the battery and the controller, for added safety.
- If using the light and timer control, test the settings during daylight and nighttime to ensure they function as expected.
- When connecting multiple loads, distribute them evenly if possible, and ensure the total current draw does not exceed the controller's maximum load current.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.
