1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your Y&H MPPT Solar Charger Controller. Designed with an advanced Maximum Power Point Tracking (MPPT) control algorithm, this controller efficiently tracks the maximum power point of your PV array, ensuring optimal energy harvesting from solar panels. It is suitable for various applications including communication base stations, home power supply systems, traffic lights, solar street lamps, and courtyard lighting systems.
2. Safety Information
Please read all instructions and warnings carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, or severe injury.
- Ensure all connections are tight and correct to avoid excessive voltage drop and poor connection.
- Install the controller in a well-ventilated area, away from flammable materials and moisture.
- Disconnect all power sources (solar panel and battery) before installing or modifying wiring.
- Use appropriate tools and wear protective gear during installation.
- The battery must be connected first to allow the controller to recognize the system voltage.
- Do not attempt to repair the controller yourself. Contact qualified personnel for service.
3. Product Overview
3.1 Key Features
- Advanced MPPT technology with tracking efficiency no less than 99.5%.
- High peak conversion efficiency up to 97%.
- Dynamic LCD display for real-time operation data and working status.
- Automatic identification of 12V/24V/36V/48V battery systems.
- Compatible with Sealed, GEL, Flooded, and LiFePO4 batteries.
- Integrated dual USB 5V charging ports (2A output).
- Comprehensive protection features: Over-voltage, Over-current, Over-temperature, Battery Over-discharge, Over-charge.
- Seven selectable working modes for diverse applications.
- User-modifiable and savable controller parameters.
- Backlight display for enhanced visibility.
3.2 Component Identification
This diagram illustrates the main components including the LCD display, control buttons, dual USB ports, battery port, solar port, load port, and the large heat sink for efficient cooling.
- LCD Display: Shows real-time operational data.
- Buttons: RESET, MENU, ON/OFF, Up (▲), Down (▼) for navigation and settings.
- Dual USB Ports: 5V, 2A output for charging external devices.
- Battery Port: Connects to the battery bank.
- Solar Port: Connects to the solar panel array.
- Load Port: Connects to DC loads.
- Heat Sink: Large finned design for excellent heat dissipation.
3.3 LCD Display Details
The LCD dynamically displays operation data and working status, including PV input parameters.
- Battery work status display area.
- Operating status of the solar panel.
- Load output status and display areas of all parameters.
- Mode control display area.
- Normal and fault status display area.
4. Specifications
| Feature | SA4860A | SA4880A | SA48100A |
|---|---|---|---|
| Voltage Auto Recognition | 12V/24V/36V/48V AUTO | ||
| Maximum Charging Current | 60A | 80A | 100A |
| Max PV Input (12V System) | 720W; Voc:15-24V | 720W; Voc:15-24V | 720W; Voc:15-24V |
| Max PV Input (24V System) | 1440W; Voc:30-48V | 1920W; Voc:30-48V | 2400W; Voc:30-48V |
| Max PV Input (36V System) | 2160W; Voc:45-72V | 2880W; Voc:45-72V | 3600W; Voc:45-72V |
| Max PV Input (48V System) | 2880W; Voc:60-100V | 3840W; Voc:60-100V | 4800W; Voc:60-100V |
| Low Voltage Shutoff (12V) | 9.5V (adjustable) | ||
| Low Voltage Shutoff (24V) | 19V (adjustable) | ||
| Low Voltage Shutoff (36V) | 28.5V (adjustable) | ||
| Low Voltage Shutoff (48V) | 38V (adjustable) | ||
| Battery Float Charge (12V) | Default 14.2V (adjustable) | ||
| Battery Float Charge (24V) | Default 28.4V (adjustable) | ||
| Battery Float Charge (36V) | Default 42.6V (adjustable) | ||
| Battery Float Charge (48V) | Default 56.8V (adjustable) | ||
| Light Control Mode | Load off during day, load on at night | ||
| Timing Mode | Load on/off timing | ||
| Light Control + Timing Mode | Load off during day, load on at night + timing | ||
| Manual Mode | Manual load switch | ||
| USB Output Voltage | 5V | ||
| USB Output Current | 2A | ||
| Discharge Overcurrent Protection | Delayed protection if above 5% of max discharge current | ||
| Charging Overcurrent Protection | Delayed protection if above 5% of max charge current | ||
| Overtemperature Protection | MOS temperature protection at 85°C | ||
| Package Size | 20.4 x 20.7 x 7.3 cm | ||
| Weight | 0.81kg | 0.87kg | 0.94kg |
4.1 Physical Dimensions and Cable Recommendations
Proper cable sizing is crucial for system safety and efficient operation. Refer to the table for recommended cable specifications.
| Model | Copper Wires | AWG | Air Circuit Breakers |
|---|---|---|---|
| SA6048 | 12mm² | 20AWG | 100A |
Dimensions: Length approx. 19.5cm (7.68in), Width approx. 18.6cm (7.32in), Height approx. 6.5cm (2.56in).
5. Setup and Installation
Important: The battery must be connected first!
5.1 Connection Order
Follow the correct connection sequence to ensure safe and proper operation of the solar charge controller:
- Connect the Battery: First, connect the battery bank to the controller's battery terminals. This allows the controller to automatically detect the system voltage (12V/24V/36V/48V).
- Connect the Solar Panel: Next, connect the solar panel array to the controller's solar terminals.
- Connect the Load: Finally, connect your DC loads to the controller's load terminals.
Ensure the battery is connected before the solar panel and load. The diagram shows both connected and disconnected system states.
This diagram illustrates the proper wiring of the solar panel, battery bank, and DC load to the controller. Always connect the battery first.
5.2 Max. Solar Input Power
Ensure your solar panel array's total power and voltage (Voc) do not exceed the controller's maximum limits for your battery system voltage:
- 12V system: Max. Solar Input 720W; Voc: 15-24V
- 24V system: Max. Solar Input 1440W; Voc: 30-48V
- 36V system: Max. Solar Input 2160W; Voc: 45-72V
- 48V system: Max. Solar Input 2880W; Voc: 60-100V
6. Operation
6.1 Navigating the LCD and Settings
The LCD provides real-time data. Use the control buttons (RESET, MENU, ON/OFF, ▲, ▼) to navigate through display screens and adjust parameters. Refer to the LCD display diagram (Figure 2) for understanding the information presented.
6.2 Working Mode Selection
The controller offers 7 distinct working modes to suit various application needs. These modes can be selected and configured via the controller's menu:
- Charging Mode: In this mode, the controller focuses solely on charging the battery and will never discharge the battery to power loads.
- Light Control Mode: The controller detects ambient light. When night is detected, it will delay for ten minutes, then begin discharging to power the load. When daytime is detected, it will delay for ten minutes, then stop discharging.
- Light and Time Delay Control Mode: Similar to Light Control Mode, but with an added timer. Upon detecting night, it delays ten minutes, starts discharging, and begins a countdown. Discharge stops when the timer reaches zero. The maximum delay duration is 23 hours and 59 minutes.
- Universal Control Mode: Under normal, trouble-free conditions, the controller will continuously discharge to power the load.
- Manual Control Mode: Discharge to the load is manually controlled using the '▼' button to toggle it on or off.
- Timing Control Mode: The controller opens or closes the discharge to the load at regularly scheduled times.
- Test Mode: This mode functions similarly to the Light and Time Delay Control Mode but with a reduced ten-minute time delay for testing purposes.
Caution regarding Low Voltage Protection:
The controller may still allow discharge under low voltage protection. If you press and hold the '▼' button for 5 seconds, discharge will continue. However, this action can potentially damage the battery and should be used with extreme caution and only when absolutely necessary. Discharge can only be stopped manually in this state.
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 cloth to wipe the exterior.
- Connections: Periodically check all wiring connections for tightness and corrosion. Loose connections can lead to overheating and inefficient operation.
- Ventilation: Ensure the installation area remains well-ventilated to allow for proper heat dissipation from the controller's heat sink.
- Battery Health: Monitor your battery's health and voltage regularly. Ensure it is compatible with the controller's settings.
- Environmental Check: Inspect the controller for any signs of physical damage, moisture ingress, or insect infestation.
8. Troubleshooting
If you encounter issues with your Y&H MPPT Solar Charger Controller, consider the following troubleshooting steps:
- No Display/Power: Check battery connections and ensure the battery has sufficient charge. Verify all fuses and circuit breakers in the system.
- No Charging: Ensure solar panels are connected correctly and receiving adequate sunlight. Check solar panel voltage (Voc) and current. Verify that the controller's charging mode is active.
- No Load Output: Check load connections and ensure the load is not drawing excessive current. Verify the selected working mode allows for load discharge. Check for any fault indicators on the LCD.
- Over-temperature Warning: Ensure the controller is installed in a well-ventilated area. Clear any obstructions around the heat sink. Reduce load if necessary.
- Inaccurate Readings: Ensure all connections are secure and free from corrosion. Recalibrate if the option is available in the menu (refer to specific model instructions if applicable).
If problems persist after performing these checks, please contact customer support for further assistance.
9. User Tips
To maximize the performance and lifespan of your Y&H MPPT Solar Charger Controller:
- Optimal Placement: Install the controller in a cool, dry, and shaded location to prevent overheating, which can reduce efficiency and lifespan.
- Battery Type Setting: Always ensure the correct battery type (Sealed, GEL, Flooded, LiFePO4) is selected in the controller settings to ensure proper charging algorithms are applied.
- Cable Sizing: Use appropriately sized cables for all connections (solar, battery, load) to minimize voltage drop and maximize efficiency. Refer to Section 4.1 for recommendations.
- Monitor Performance: Regularly check the LCD display for system status, battery voltage, and charging/discharging currents to ensure everything is operating as expected.
- USB Ports: The dual USB ports are convenient for charging small devices, but avoid overloading them.
10. Warranty and Support
Y&H products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official Y&H website. Please have your model number (SA4860A, SA4880A, or SA48100A) and purchase details ready when contacting support.
