1. Product Overview
The EASUN MPPT Solar Charge Controller is designed for efficient and intelligent management of solar power systems. It features Maximum Power Point Tracking (MPPT) technology to maximize energy harvest from solar panels, automatic 12V/24V system voltage recognition, and compatibility with various battery types including Sealed, Flooded, GEL, LiFePO4, and Li(NiCoMn)O2. This controller offers robust protection features and a user-friendly back-light LCD for easy monitoring and setting adjustments.
Figure 1: EASUN MPPT Solar Charge Controller (20A/40A models)
Key Features:
- 20A/40A MPPT solar charge controller (30A model is currently sold out)
- 12V/24V automatic system voltage recognition; 32V setting for battery
- MPPT efficiency >99%, Peak conversion efficiency >98%
- DSP processors technology for high speed and performance
- Multi-stage charging mode protection: PV array short circuit, PV reverse polarity, Battery reverse polarity, Over charging, Output short circuit
- Equalization charging function
- BTS (Battery Temperature Sensor) function
- IP30 Protection class
Video 1: Product overview and specifications of the EASUN MPPT Solar Charge Controller.
2. Safety Information
- Read all instructions carefully before installation and operation.
- Ensure proper ventilation around the controller.
- Do not disassemble or attempt to repair the controller yourself. Contact qualified personnel.
- Always connect the battery first, then the solar panels, and finally the load. Disconnect in reverse order.
- Ensure all wiring is correctly polarized and securely connected to prevent damage.
- Use appropriate wire gauges for your system's current and distance.
3. Installation and Setup
3.1 Physical Dimensions
Figure 2: Product dimensions for different models.
| Model | Dimensions (Length*Width*Height) |
|---|---|
| iCharger MPPT 2420 (20A) | 178*124*48mm |
| iCharger MPPT 2430 (30A) | 178*124*48mm (Note: 30A model currently sold out) |
| iCharger MPPT 2440 (40A) | 218*148*67mm |
3.2 Wiring Diagram and Precautions
Follow these steps carefully to connect the cables and install the system. Incorrect wiring can cause damage to the controller or other components.
Figure 3: Wiring Precautions and Connection Steps.
- Connect batteries: Ensure correct polarity.
- Connect the load: Connect your DC loads to the designated terminals.
- Connect the solar panels: Ensure correct polarity and voltage within the specified range.
- Connect the inverter to the battery: (Ignore this step if no inverter is used).
Figure 4: General Connection Diagram.
4. Operating Instructions
4.1 LCD Display and Button Functions
The controller features a back-light LCD display and two buttons for navigation and settings.
Figure 5: Button functions and LCD display icons.
| Button | Button Pattern | Button Function |
|---|---|---|
| MENU |  | Short press to switch down, press and hold for 3 seconds to enter the next interface. |
| SET | | Short press to switch up, press and hold for 3 seconds to exit without saving. |
4.2 Boot Screen
When the system is powered on, the LCD will display the starting interface, followed by the battery voltage, and then the software revision.
Figure 6: Boot Screen sequence.
Notice:
- At the first interface, long press the "MENU" button to enter the secondary interface.
- The controller will automatically switch to the first interface if no action is taken for 15 seconds.
4.3 Main Loop Pages
After the controller is powered on, the LCD screen will enter the main page. Short press "MENU" or "SET" to switch among the main loop pages:
Figure 7: Main Loop Pages navigation.
4.4 Load Switch On/Off
From the main page, you can control the load output:
- Short press "SET" button: To switch on/off the load.
- Long press "MENU" for 3 seconds: To save settings.
- Long press "SET" for 3 seconds: To switch to the main page without saving settings.
4.5 System Voltage Setting
To set the system voltage (12V or 24V):
Figure 8: System Voltage Setting.
- Under the main page, long press "MENU" for 3 seconds to enter the setting page.
- Switch to the system voltage page.
- Long press "MENU" for 3 seconds until "AUTO" starts to flash.
- Short press "MENU" or "SET" to turn the system voltage to 12V or 24V.
4.6 Battery Type Setting
To set the battery type:
Figure 9: Battery Type Setting options.
- Under the main page, long press "MENU" for 3 seconds to enter the setting page.
- Short press "MENU" to switch to the battery type page (user mode 1).
- Long press "MENU" for 3 seconds to enter battery type selection pages.
- Short press "MENU" or "SET" to switch among GEL battery, Sealed battery, Flooded battery, and Lithium batteries.
- For Lithium batteries, long press "MENU" for 3 seconds to enter a program for setting lithium battery's capacity. The parameters on the screen will start flashing.
- Long press "MENU" for 3 seconds, the parameter will become to battery capacity.
- Short press "MENU" or "SET" to set the capacity of the currently connected lithium batteries.
- After setting the parameters, save the data by long pressing "MENU" for 3 seconds.
4.7 Other Setting Pages
You can navigate through various other setting pages to fine-tune your controller's operation.
Figure 10: Navigation through setting pages.
Under the main page, long press "MENU" for 3 seconds to enter the setting page, and then short press "MENU" or "SET" to switch among the setting pages.
5. Specifications
| Item | 20A Model | 30A Model | 40A Model |
|---|---|---|---|
| Rated charge current | 20A | 30A | 40A |
| Input | |||
| Solar panel input range | 16.8V-60V (12V) 33.6V-60V (24V) | 16.8V-75V (12V) 33.6V-75V (24V) | 16.8V-100V (12V) 33.6V-100V (24V) |
| System rated voltage | 12/24V Auto recognized | ||
| Maximum battery voltage | 8V-32V | ||
| Maximum input power | 260W (12V) 520W (24V) | 390W (12V) 780W (24V) | 520W (12V) 1040W (24V) |
| Output | |||
| Rated Discharge Current | 20A | 20A | 30A |
| Battery type | User default, Sealed, Flooded, GEL, LiFePO4, Li(NiCoMn)O2 | ||
| Equalized charging voltage | Maintenance-free lead-acid battery: 14.6V (Duration: 2 hours) GEL: No Lead-acid Flooded battery: 14.8V | ||
| Absorption charging voltage | Maintenance-free lead-acid battery: 14.4V (Duration: 2 hours) 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 | ≤50mA | ||
| HVD (High Voltage Disconnect) | Lead acid battery 16V | ||
| Light control voltage | 5V/10V | ||
| Temperature compensation coefficient | -4mV/°C/2V (25°C) | ||
| Discharge loop voltage drop | -20°C ~ +70 °C | ||
| Operating temperature | -20°C ~ +55 °C | ||
| Storage temperature | -30°C ~ +80 °C | ||
| Working humidity | ≤90%, No condensation | ||
| Protection class | IP30 | ||
| Grounded type | Positive grounded | ||
| Aperture for installation | Φ5mm | ||
6. Maintenance
To ensure optimal performance and longevity of your MPPT Solar Charge Controller, regular maintenance is recommended:
- 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 to ensure they are tight and secure. Loose connections can lead to overheating and poor performance.
- Ventilation: Ensure that the cooling fins on the back of the controller are not obstructed to allow for proper heat dissipation.
- Environmental Conditions: Verify that the operating environment remains within the specified temperature and humidity ranges.
- Firmware Updates: Check the manufacturer's website for any available firmware updates that may improve performance or add new features.
7. Troubleshooting
If you encounter issues with your solar charge controller, consider the following basic troubleshooting steps:
- No Display/Power: Check battery connections and ensure the battery voltage is within the controller's operating range. Verify that the solar panels are receiving sunlight.
- No Charging: Confirm solar panel connections and polarity. Check if the solar panel input voltage is sufficient (refer to specifications). Ensure the battery type settings are correct.
- Load Not Working: Check load connections and ensure the load is not exceeding the rated discharge current. Verify that the load output is enabled in the controller settings.
- Error Codes: If the LCD displays an error code, consult the full product manual (if available) or contact customer support with the specific code.
- Overheating: Ensure adequate ventilation around the controller and that the ambient temperature is within the operating range.
For complex issues, it is recommended to contact qualified technical support.
8. User Tips
- Battery Compatibility: This controller is compatible with a wide range of battery types, including LiFePO4. Ensure you select the correct battery type in the settings for optimal charging and battery health.
- Monitoring: Regularly check the LCD display for system status, including battery voltage, charging current, and accumulated energy. This helps in understanding system performance.
- Temperature Sensor: Utilize the BTS (Battery Temperature Sensor) function for accurate temperature compensation during charging, which is crucial for battery longevity, especially in varying climates.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official EASUN POWER website or contact your authorized dealer. Keep your purchase receipt as proof of purchase.
