1. Introduction
The Easun MPPT Solar Charger Controller is an advanced device designed to efficiently manage power flow from your solar panels to your battery bank. Utilizing Maximum Power Point Tracking (MPPT) technology, it optimizes battery charging performance across various system voltages (12V, 24V, 36V, 48V) and supports multiple battery types, including LiFePO4 and traditional lead-acid batteries. This manual provides essential information for safe installation, operation, and maintenance of your solar charge controller.
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 wiring is performed by qualified personnel.
- Always disconnect power from the solar array and battery bank before installing or servicing the controller.
- Use appropriate tools and personal protective equipment.
- Do not disassemble the controller. There are no user-serviceable parts inside.
- Install the controller in a well-ventilated area, away from flammable materials and corrosive gases.
- Ensure correct polarity when connecting batteries and solar panels to prevent damage.
3. Product Features
- 100% MPPT (Maximum Power Point Tracking) technology for optimal solar energy harvesting.
- Built-in high-performance DSP controller.
- Automatic detection of 12V / 24V / 36V / 48V battery voltage.
- Three-stage charging (Constant Current, Constant Voltage, Floating) to optimize battery performance and lifespan.
- Multifunctional LCD display for monitoring system status.
- Comprehensive protection features: Solar panel anti-polarity protection, overcharge protection, Battery Over Voltage Protection (OVP), Battery Low Voltage Disconnect (LDV), Solar Over Voltage Protection (OVP), over-temperature protection, and Reverse Polarity protection.
- Supports RS485 communication with Modbus protocol.
- Compatible with various battery types: User-defined, Sealed, Flooded, GEL, LiFePO4, and Li(NiCoMn)O2.
- Easy to mount design.
4. Specifications
| Parameter | 20A / 30A / 40A Models | 60A / 80A / 100A Models | ||||
|---|---|---|---|---|---|---|
| Charging Mode | 3-stage: Constant Current (MPPT), Constant Voltage, Floating | |||||
| Voltage System | 12/24V Auto recognized | 12/24/36/48V Auto recognized | ||||
| Max PV Input Power (12V) | 260W | 390W | 520W | 720W | 1200W | 1500W |
| Max PV Input Power (24V) | 520W | 780W | 1040W | 1440W | 2400W | 3000W |
| Max PV Input Power (36V) | N/A | 2160W | 3600W | 4500W | ||
| Max PV Input Power (48V) | N/A | 2880W | 4800W | 6000W | ||
| Max PV Input Voltage (Voc) | 16.8V-60V (12V), 33.6V-60V (24V) | 150Voc | ||||
| Battery Voltage Auto Recognition | 8V-32V | 12V System (8.7V-15.5V); 24V System (16V-31V); 36V System (33V-41V); 48V System (42V-64V) | ||||
| Limited Current Protection | 20A | 30A | 40A | 60A | 80A | 100A |
| Battery Type | User default, Sealed, Flooded, GEL, LiFePO4, Li(NiCoMn)O2 | |||||
| Enclosure | IP30 | IP21 | ||||
| Quality | 100% genuine | |||||
| PV utilization | ≥ 99% | |||||
| Temperature protection | 75 ℃ | |||||
| Fan-on temperature | > 45 ℃ | |||||
| Fan-off temperature | < 40 ℃ | |||||
| Gross weight (Kg) | 1.2KG | |||||
5. Installation and Setup
Follow these steps carefully to install your MPPT solar charge controller:
- Mounting: Choose a suitable location for mounting the controller. It should be indoors, protected from direct sunlight, high temperatures, and moisture. Ensure adequate ventilation around the unit for proper cooling.
- Wiring Precautions: Always connect the battery first, then the solar panels, and finally the load. Disconnect in the reverse order.
- Step 1: Connect Batteries: Connect the battery cables to the BAT+ and BAT- terminals on the controller. Ensure correct polarity.
- Step 2: Connect the Load: Connect your DC load to the LOAD+ and LOAD- terminals.
- Step 3: Connect Solar Panels: Connect the solar panel cables to the PV+ and PV- terminals. Ensure correct polarity and that the PV input voltage is within the controller's specified range.
- Step 4: Connect Inverter (Optional): If using an inverter, connect it to the battery bank. This step can be ignored if no inverter is used.
Working Voltage Requirements:
- 12V battery: DC20V ~ DC150V PV voltage
- 24V battery: DC37V ~ DC150V PV voltage
- 36V battery: DC50V ~ DC150V PV voltage
- 48V battery: DC72V ~ DC150V PV voltage
6. Operation
6.1. LCD Display Introduction
The controller features a multifunctional LCD display that provides real-time system status and allows for parameter adjustments.
6.2. Button Introduction (View Mode)
The controller has four operation keys: ESC, UP, DOWN, and ENTER.
| Function Key | System Mode | Operation | Operation Indication |
|---|---|---|---|
| ENTER | View Mode | Long Press | Enter SET mode |
| UP (▲) | View Mode | Short Press | Screen page down |
| DOWN (▼) | View Mode | Short Press | Screen page up |
| ESC | View Mode | Short Press | - |
7. Parameter Settings
To enter Setting Mode, long press the ENTER key from View Mode. Use the UP and DOWN keys to navigate and adjust values, and ENTER to confirm. ESC exits without saving changes.
| Function Key | System Mode | Operation | Operation Indication |
|---|---|---|---|
| ENTER | Setting Mode | Long Press | Exit from setting & saving the present settings data |
| ENTER | Setting Mode | Short Press | Enter the next setting page |
| UP (▲) | Setting Mode | Short Press | Adjust the parameter by increase the value |
| DOWN (▼) | Setting Mode | Short Press | Adjust the parameter by decrease the value |
| ESC | Setting Mode | Short Press | Exit SET Mode without saving data |
7.1. Battery Type Setting
The controller allows you to select the appropriate battery type for optimal charging. Navigate to the battery type setting menu using the UP/DOWN keys.
7.2. Parameter Setting for Specific Battery Types
Once the battery type is selected, you can adjust specific charging parameters.
8. Maintenance
Regular maintenance ensures optimal performance and longevity of your solar charge controller:
- Cleaning: Periodically clean the controller's exterior with a dry cloth. Ensure ventilation openings are free from dust and debris.
- Connections: Check all wiring connections regularly to ensure they are tight and free from corrosion.
- Environment: Ensure the installation environment remains within the specified temperature and humidity ranges.
- Firmware: Check the manufacturer's website for any available firmware updates.
9. Troubleshooting
If you encounter issues with your solar charge controller, consider the following basic troubleshooting steps:
- No Display/Power: Check battery connections and voltage. Ensure the battery is adequately charged.
- No Charging: Verify solar panel connections and ensure they are receiving sufficient sunlight. Check PV input voltage against specifications.
- Error Codes: Refer to the LCD display introduction (Menu5) for specific error codes and their meanings.
- Overheating: Ensure the controller has adequate ventilation and is not installed in direct sunlight or an enclosed space.
For persistent issues, consult the detailed troubleshooting section in the full product manual (if available) or contact customer support.
10. User Tips
- Verify Max Input Voltage: Always confirm the maximum PV input voltage for your specific controller model (e.g., 150V for 60A/80A/100A models, or 60V for 20A/30A/40A models) to prevent damage from over-voltage.
- Parallel Connection: For higher current requirements, multiple controllers can be connected in parallel. For example, two 60A units can provide 120A MPPT capacity. The controller supports unlimited parallel connections.
11. Warranty and Support
This product comes with a 1-year warranty from the date of purchase. For warranty claims or technical support, please contact your retailer or the Easun EU Store directly. Keep your purchase receipt as proof of purchase.
