1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your POWLSOJX 30A MPPT Solar Charge Controller (Model: KR-MPT30A). This controller is designed to efficiently manage power flow from your solar panels to your battery bank in 12V or 24V solar systems, featuring advanced MPPT technology and active cooling for optimal performance and longevity.
2. Key Features
- Active Turbo Cooling Fan: Prevents overheating and power derating, ensuring continuous 30A charging even in high ambient temperatures (up to 45°C). This active cooling mechanism extends the lifespan of the controller by preventing component burnout.
- Advanced MPPT Technology: Utilizes Buck Circuit Topology to maximize energy harvest from solar panels, increasing charging efficiency by 10-30% compared to traditional PWM controllers.
- Wide Battery Compatibility: Supports LiFePO4, Lithium-ion, and Lead-acid (Gel/AGM/Flooded) batteries. Charging voltages (Float, LVD, LVR) are customizable via the menu to match specific battery requirements.
- User-Friendly Interface: Features a large LCD display for real-time monitoring of Battery Voltage, Charging Current (Amps), Temperature, and System Status.
- Dual USB Ports: Provides 5V 2A output for direct charging of mobile phones, tablets, or USB-powered devices.
3. Technical Specifications
| Feature | Specification |
|---|---|
| Model | KR-MPT30A |
| System Voltage | 12V / 24V (Auto Detection) |
| Rated Current | 30A |
| Max PV Input Voltage (Voc) | < 60V (Do not exceed!) |
| Max PV Input Power | 360W (12V System) / 720W (24V System) |
| Standby Power | < 20mA @ 12V |
| USB Output | Dual 5V / 2A |
| Dimensions | 166 x 120 x 60 mm |
| Weight | 510g |
| Max Wire Size | 15mm² / 6AWG |
4. Safety Information
Please read all safety instructions carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Ensure all connections are tight and correct to avoid loose connections that can cause excessive heat.
- Do not disassemble or attempt to repair the controller yourself. Contact qualified personnel for service.
- Install the controller in a well-ventilated area, away from flammable materials and corrosive gases.
- Ensure the solar panel array's Open Circuit Voltage (Voc) does not exceed 60V. Overvoltage will damage the controller.
- Always connect the battery first and disconnect the solar panel first when uninstalling.
5. Installation Guide
5.1 Wiring Diagram
The following diagram illustrates a typical wiring setup for the solar charge controller. Ensure all components are connected correctly and securely.
Important Note on PV Input Voltage: The Maximum Open Circuit Voltage (Voc) of your solar panel array must be LESS THAN 60V. Do NOT connect panels in series (string) if the total voltage exceeds 60V. It is recommended to connect panels in PARALLEL to increase current while keeping the voltage within safe limits for 12V/24V systems.
5.2 Connection Order
Follow these steps for proper installation and uninstallation to prevent damage to the controller or other components:
- Step 1: Connect the Battery. Connect the battery to the controller first. The controller's LCD screen will power on once the battery is connected.
- Step 2: Connect the Solar Panel. Connect the solar panel array to the controller second.
- Step 3: Connect the Load (Optional). If you have a DC load, connect it to the controller's load terminals last.
Uninstallation: Reverse the order when uninstalling. First, disconnect the load, then the solar panel, and finally the battery.
6. Operation
6.1 LCD Display and Controls
The controller features a clear LCD display and intuitive buttons for monitoring and configuration.
- Real-time Monitoring: The LCD displays battery voltage, charging current (Amps), temperature, and system status.
- Button Operation: Use the buttons to navigate through the menu and adjust settings. Hold a button for 2 seconds to reset certain parameters or enter advanced settings.
- Dual USB Ports: Located on the front panel, these ports provide 5V 2A output for charging external devices.
6.2 Battery Type Settings
The controller supports various battery types. You can customize charging parameters to optimize performance for your specific battery.
- The controller automatically detects 12V or 24V systems.
- Access the menu via the buttons to adjust settings such as Float Voltage, Low Voltage Disconnect (LVD), and Low Voltage Reconnect (LVR) to match your battery's specifications (e.g., LiFePO4, Gel, AGM, Flooded).
- For 24V systems, ensure your solar panel voltage is within the 30V-55V range for optimal charging.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your solar charge controller:
- Cleanliness: Keep the controller clean and free from dust. Periodically wipe the casing with a dry cloth. Ensure the cooling fan vents are not obstructed.
- Connections: Periodically check all wiring connections for tightness. Loose connections can lead to resistance and overheating.
- Environment: Ensure the installation environment remains within the recommended temperature and humidity ranges.
- Battery Health: Monitor your battery's health and ensure it is properly maintained according to its manufacturer's guidelines.
8. Troubleshooting
This section addresses common issues you might encounter with your solar charge controller.
- Q: Is this a "True" MPPT controller?
- A: Yes, it uses MPPT (Maximum Power Point Tracking) technology with a Buck converter topology to step down voltage and increase current. It is significantly more efficient than PWM controllers.
- Q: Does it work with 24V batteries?
- A: Yes. It automatically detects 12V or 24V systems upon connection. Note: For 24V systems, ensure your solar panel voltage is within the 30V-55V range.
- Q: Why does it have a fan?
- A: The fan actively removes heat, allowing the controller to run at full 30A power without overheating, making it suitable for hot climates.
- Q: Can I charge a completely dead lithium battery?
- A: Yes, if the battery voltage is sufficient for the controller to power up, it can charge. Please ensure the battery voltage is within the recognition range.
- Issue: Controller display is off.
- Possible Cause: Battery not connected or low voltage.
Solution: Ensure the battery is properly connected and has sufficient charge. The controller requires battery power to operate its display. - Issue: No charging current from solar panels.
- Possible Cause: Solar panels not connected, insufficient sunlight, or PV voltage too high/low.
Solution: Check solar panel connections. Ensure adequate sunlight. Verify PV Open Circuit Voltage (Voc) is within the <60V limit and appropriate for your system voltage (e.g., 30V-55V for 24V systems).
9. User Tips
- Optimal Panel Configuration: For best performance and to stay within the 60V PV input limit, connect your solar panels in parallel rather than series, especially for 12V systems. This maximizes current while keeping voltage safe.
- Temperature Management: While the controller has an active cooling fan, ensure it's installed in a location with good airflow to further aid heat dissipation, especially in very hot environments.
- Customizing Settings: Take advantage of the customizable charging parameters (Float, LVD, LVR) to fine-tune the controller for your specific battery type and extend battery life. Refer to your battery's datasheet for recommended values.
- USB Charging: The dual USB ports are convenient for small device charging, but remember they draw power from your battery. Monitor battery levels if using them extensively.
10. Package Contents
Upon opening the package, you should find the following items:
- 1x POWLSOJX 30A MPPT Solar Charge Controller (Model: KR-MPT30A)
- 1x User Manual (English)
11. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase.
