1. Introduction
The Y&H ME Series MPPT Solar Charge Controller is designed for efficient and stable energy management in various solar power systems. Utilizing Maximum Power Point Tracking (MPPT) technology, it achieves up to 99% tracking efficiency, significantly outperforming traditional PWM controllers. This controller automatically recognizes 12V, 24V, 36V, and 48V systems and is compatible with a wide range of battery types, including lithium-ion, lead-acid, and gel batteries. It is an ideal solution for home photovoltaic systems, RVs, boats, and small off-grid power stations.
2. Safety Information
⚠ WARNING: 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.
Always observe the following safety precautions during installation and operation:
- Ensure all wiring is correctly polarized to prevent damage from reversed photovoltaic polarity.
- Do not exceed the maximum input voltage or current ratings for the solar panels.
- Install the controller in a well-ventilated area, away from direct sunlight, high temperatures, and moisture.
- Ensure proper grounding of the system. This controller uses positive grounding.
- Disconnect all power sources (solar panels and battery) before performing any wiring or maintenance.
- Use appropriate circuit breakers or fuses for both the PV array and battery connections.
3. Specifications
The Y&H ME Series MPPT Solar Charge Controller is available in various models with different current ratings. The following table details the specifications for the ME8048 and ME10048 models, along with other variants for comparison.
| Parameter | ME4024 | ME6048 | ME8048 | ME10048 | |
|---|---|---|---|---|---|
| Rated charge current | 40A | 60A | 80A | 100A | |
| Input | |||||
| Maximum input power | 12V: 520W | 12V: 780W | 12V: 1040W | 12V: 1300W | |
| 24V: 1040W | 24V: 1560W | 24V: 2080W | 24V: 2600W | ||
| / | 36V: 2340W | 36V: 3102W | 36V: 3900W | ||
| / | 48V: 3120W | 48V: 4160W | 48V: 5200W | ||
| System rated voltage | 12V/24V Auto | 12V/24V/36V/48V Auto | |||
| Max open voltage of solar panel (Voc) | <75V | <150V | |||
| Output | |||||
| Rated Discharge Current | 20A | 30A | 40A | ||
| Battery type | User default, Sealed, Flooded, GEL, LiFePO4, Li(NiCoMn)O2. | ||||
| Equalized charging | Duration: 2 hours | Maintenance-free lead-acid battery: 14.6V; GEL: No; Lead-acid Flooded battery: 14.8V | |||
| Absorption charging | Duration: 2 hours | Maintenance-free lead-acid battery: 14.4V; GEL: 14.2V; Lead-acid Flooded battery: 14.6V | |||
| Float charging voltage | Maintenance-free lead-acid battery, GEL, lead-acid Flooded battery: 13.8V | ||||
| LVR (Low Voltage Reconnect) | Maintenance-free lead-acid battery, GEL, lead-acid Flooded battery: 12.6V | ||||
| LVD (Low Voltage Disconnect) | Maintenance-free lead-acid battery, GEL, lead-acid Flooded battery: 10.8V | ||||
| Static loss | 24V(<50mA)/48V(<35mA) | ||||
| HVD (High Voltage Disconnect) | 12V Lead acid battery: 16V | ||||
| 24V Lead acid battery: 32V | |||||
| 36V Lead acid battery: 48V | |||||
| 48V Lead acid battery: 64V | |||||
| Light control voltage | 5V/10V/15V/20V | ||||
| Temperature compensation coefficient | -4mV/℃/2V(25℃) | ||||
| Discharge loop voltage drop | ≤0.2V | ||||
| Operating temperature | -20℃～+55℃ | ||||
| Storage temperature | -30℃～+80℃ | ||||
| Working humidity | ≤90%, No condensation | ||||
| Protection class | IP30 | ||||
| Grounded type | Positive grounded | ||||
| Aperture for installation | Φ5mm | ||||
Note: The preceding parameters are for a 12V system at 25℃. For a 24V system, multiply voltage parameters by 2; for a 36V system, multiply by 3; for a 48V system, multiply by 4.
4. Setup and Installation
4.1 Installation Location
Install the controller in a well-ventilated area, protected from direct sunlight, high temperatures, and moisture. Ensure sufficient clearance around the unit for proper heat dissipation. The mounting holes are Φ5mm.
4.2 Wiring Sequence
Follow these steps carefully to connect the solar charge controller:
- Connect the Battery: Ensure the battery breaker is open (off). Connect the battery cables to the controller's battery terminals. Observe correct polarity (positive to positive, negative to negative).
- Connect Solar Panels: Ensure the PV breaker is open (off). Connect the solar panel cables to the controller's PV terminals. Observe correct polarity.
- Power On Controller: Close the battery breaker to power on the controller. The LCD display should illuminate.
- Connect Solar Panels (Activate): Close the PV breaker. The controller will begin charging the battery.
Important: Always connect the battery first, then the solar panels. Disconnect in reverse order (solar panels first, then battery).
4.3 Easy Wiring Access
To access the wiring terminals, slide the controller's cover forward to open it. This provides easy access for connecting the battery and PV cables.
5. Operating Instructions
5.1 LCD Display and Navigation
The controller features an intuitive LCD screen that displays real-time system status and charging parameters. Use the 'Menu' and 'Set' buttons to navigate and adjust settings.
- Menu Button: Press to cycle through different display parameters (e.g., battery voltage, charging current, load status).
- Set Button: Press and hold to enter setting mode for the currently displayed parameter. Use 'Menu' to adjust values and 'Set' to confirm.
5.2 Load Working Modes
The controller supports various load working modes to suit different application needs:
- Manual Mode (24H): The load output is continuously on for 24 hours.
- Solar Light Control Mode: The load output turns on at sunset and turns off at sunrise, controlled by ambient light levels.
- Solar Light + Time Control Mode: The load output turns on at sunset and remains on for a set duration (e.g., 1-15 hours), then turns off.
6. Maintenance
Regular maintenance ensures optimal performance and longevity of your solar charge controller:
- Clean Terminals: Periodically check and clean all wiring terminals to ensure tight connections and prevent corrosion.
- Dust Removal: Keep the controller's exterior clean and free of dust. Ensure ventilation openings are not obstructed.
- Inspect Wiring: Check all cables for signs of wear, damage, or loose connections.
- Monitor Performance: Regularly check the LCD display for normal operation and expected charging/discharging values.
- Battery Health: Ensure your batteries are well-maintained according to their manufacturer's guidelines.
7. Troubleshooting
Here are some common issues and their potential solutions:
- Controller Not Powering On:
- Check battery connections and ensure correct polarity.
- Verify battery voltage is within the controller's operating range.
- Check for blown fuses in the battery circuit.
- No Charging from Solar Panels:
- Ensure solar panels are connected correctly and receiving sunlight.
- Check PV array voltage (Voc) and current.
- Verify PV breaker is closed (on).
- Inspect PV wiring for loose connections or damage.
- Load Not Working:
- Check load connections and ensure correct polarity.
- Verify the load working mode setting on the controller.
- Check for overcurrent or short-circuit protection activation.
- Ensure battery voltage is above the Low Voltage Disconnect (LVD) threshold.
- Inaccurate Readings on LCD:
- Ensure the temperature sensor is properly connected and not damaged.
- Verify battery type settings match the connected battery.
If issues persist, consult a qualified technician or contact customer support.
8. User Tips
- Battery Type Setting: Always ensure the correct battery type is selected in the controller settings to optimize charging and prolong battery life. Incorrect settings can lead to undercharging or overcharging.
- System Sizing: When expanding your solar system, ensure that the total PV power and current remain within the controller's maximum limits for your chosen battery voltage.
- Ventilation is Key: Good airflow around the controller is crucial, especially in warmer climates, to prevent overheating and ensure efficient operation.
- Cable Sizing: Use appropriately sized cables for your PV array and battery connections to minimize voltage drop and maximize efficiency.
9. 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.
