1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your EASUN POWER Hybrid Solar Inverter. These inverters are designed to provide reliable power for various applications, integrating solar charging, AC/DC conversion, and battery management. Please read this manual thoroughly before installation and use to ensure safe and optimal performance.
Figure 1: EASUN POWER 4KW Hybrid Solar Inverter highlighting 230VAC, 100A Max Solar Charge, 4000W Max PV Array Power, 450VDC Max PV Array Voltage.
2. Safety Information
Always observe the following safety precautions to reduce the risk of injury or damage to the inverter:
- Ensure all connections are secure and correctly polarized.
- Do not attempt to open or repair the inverter yourself. Refer to qualified service personnel.
- Keep the inverter away from flammable materials and ensure adequate ventilation.
- Wear appropriate personal protective equipment (PPE) during installation.
- Verify all voltage and current ratings match your system components before connecting.
Figure 2: Product Display showing different angles of the inverter unit.
3. Product Overview
3.1. Components and Interface
The inverter features an intuitive LCD display, LED indicators, and touch buttons for easy operation. The rear panel provides all necessary connection terminals.
Figure 3: Product Overview with LCD Display, Function Keys, and LED Indicators.
LED Indicator Messages:
| LED Indicator | State | Messages |
|---|---|---|
| INV / AC | Green, Solid On | Output is powered by utility in Line mode. |
| INV / AC | Green, Flashing | Output is powered by battery or PV in battery mode. |
| CHG | Green, Solid On | Battery is fully charged. |
| CHG | Green, Flashing | Battery is charging. |
| FAULT | Red, Solid On | Fault occurs in the inverter. |
| FAULT | Red, Flashing | Warning condition occurs in the inverter. |
Function Keys:
| Function Key | Description |
|---|---|
| ESC | To exit setting mode |
| UP | To go to previous selection |
| DOWN | To go to next selection |
| ENTER | To confirm the selection in setting mode or enter setting mode |
3.2. Rear Panel Connections
Figure 4: Rear panel of the 4KW inverter showing (1) LCD screen, (2) LED Indicator, (3) Touch button, (4) COMM communication port, (5) BMS communication port (Option), (6) Power on/off switch, (7) AC input terminal, (8) AC output terminal, (9) Battery input, (10) PV input terminal.
Figure 5: Detailed rear panel for 6.2KW model showing (1) Power on/off switch, (2) AC input, (3) Main output, (4) Second output, (5) PV input, (6) Battery communication/RS-485 port, (7) WIFI communication/RS-232 port, (8) Battery input.
Figure 6: Detailed rear panel for 3.2KW/4KW model showing (1) Wire outlet hole (RS232/RS485 communication port), (2) Power on/off switch, (3) Grounding, (4) AC input, (5) AC output, (6) PV input, (7) Battery input.
4. Installation and Setup
Follow these steps for proper installation of your hybrid solar inverter. It is recommended to have a qualified electrician perform the installation.
4.1. Wiring Connections
Refer to the installation video and diagrams for visual guidance.
Video 1: Step-by-step guide for connecting the EASUN POWER Hybrid Solar Inverter.
- Connect Battery Terminals: Carefully connect the positive (red) and negative (blue/black) battery terminals to the inverter's battery input ports. Ensure correct polarity and secure connections.
- Connect AC Input: Connect the AC input wires (Live, Neutral, Ground) to the designated AC input terminals on the inverter.
- Connect PV Input: Connect the solar panel (PV) input wires (positive and negative) to the PV input terminals. Ensure the PV array voltage and current are within the inverter's specifications.
- Connect WiFi Module (Optional): If using the WiFi monitoring feature, connect the WiFi module to the communication port (e.g., RS232 or RS485) on the inverter.
- Connect AC Output: Connect your loads (home appliances) to the AC output terminals.
4.2. PV Connection Guidelines
When selecting proper PV modules, please consider the following parameters:
- Open Circuit Voltage (Voc) of PV modules should not exceed the maximum PV array open circuit voltage of the inverter.
- Open Circuit Voltage (Voc) of PV modules should be higher than the minimum battery voltage.
Figure 7: PV Connection diagram and module parameters for iSolar-SMR-II-3.2KW-24V-Wifi.
Figure 8: PV Connection diagram and module parameters for iSolar SMG II 4KW.
Figure 9: PV Connection diagram and module parameters for iSolar SMH III 6.2KW WIFI.
5. Operation
Once all connections are made and verified, switch on the inverter using the power on/off switch. The LCD display will illuminate, showing system status and parameters.
5.1. Navigating the LCD Display
Use the ESC, UP, DOWN, and ENTER buttons to navigate through the display menus and adjust settings. The video demonstrates basic menu navigation for setting parameters like output voltage and charging current.
Figure 10: LCD Display and Function Keys for operating the inverter.
5.2. System Diagram
The inverter can operate with or without a battery connected, depending on your system configuration and power requirements.
Figure 11: System Diagram illustrating typical setups with and without battery connection, including solar power, generator/utility, and home appliances.
6. Specifications
The following table details the technical specifications for the various EASUN POWER Hybrid Solar Inverter models:
| MODEL | iSolar SMR II 3.2KW | iSolar SMG II 4KW | iSolar SMH III 6.2KW |
|---|---|---|---|
| Rated Power | 3200VA/3200W | 4000VA/4000W | 6200W/6200VA |
| AC Voltage | 230VAC | ||
| Voltage Range | 170-280VAC (For Personal Computers); 90-280VAC (For Home Appliances) | ||
| Frequency Range | 50/60Hz (Autosensing) | ||
| AC Voltage Regulation (Battery Mode) | 230VAC ±5% | ||
| Rated Frequency | 50/60Hz | ||
| Efficiency (Peak) | 93% | ||
| Waveform | Pure Sine wave | ||
| Transfer Time | 10ms (For Personal Computers); 20ms (For Home Appliances) | ||
| Battery Voltage | 24VDC | 24VDC | 48VDC |
| Floating Charge Voltage | 27VDC | 27VDC | 52VDC |
| Overcharge Protection | 33VDC | 33VDC | 54VDC |
| Battery type | Lithium/Lead-acid | ||
| Maximum PV Array Open Voltage (V) | 500VDC | ||
| Maximum PV Array Power | 3500W | 4000W | 6500W |
| MPPT voltage range(V) | 30~450VDC | 60VDC~500VDC | 60~450VDC |
| Maximum solar charge current | 80A | 100A | 120A |
| Maximum AC charge current | 60A | 80A | 100A |
| Maximum charge current | 80A | 100A | 120A |
| Operation temperature | -10°C ~ 50°C | ||
| Relative humidity | 5% ~ 95% (Non-condensing) | ||
| Dimensions DxWxH(mm) | 348*270*95 | 358*295*100 | 420*350*110 |
| Net Weight (KG) | 5.5 | 7 | 8.9 |
| Interface | Standard: RS232, USB; CAN&RS485; Optional: WiFi, Bluetooth | ||
| Safety standard | EN/IEC62109-1, EN/IEC62109-2 | ||
7. Maintenance
Regular maintenance ensures the longevity and efficiency of your inverter:
- Keep the inverter's ventilation openings clear of dust and debris.
- Periodically check all wiring connections for tightness and signs of corrosion.
- Clean the exterior of the inverter with a dry cloth. Do not use liquid cleaners.
- Monitor the LCD display for any warning or fault messages and address them promptly.
8. Troubleshooting
If you encounter issues with your inverter, refer to the LED indicator messages and the following general troubleshooting tips:
- No Power Output: Check AC input connection, battery voltage, and ensure the power switch is ON. Verify no FAULT LED is active.
- Battery Not Charging: Check PV input connections and voltage. Ensure solar panels are receiving adequate sunlight. Verify CHG LED status.
- Fault LED On: Refer to the LED indicator table (Figure 3) for the specific fault message. Disconnect power, inspect connections, and restart the inverter. If the fault persists, contact support.
- Inconsistent Output: Check for loose connections, ensure loads are within the inverter's rated capacity, and verify battery health.
9. User Tips
- For optimal battery life, ensure your battery type setting in the inverter matches your actual battery chemistry (e.g., Lithium or Lead-acid).
- Consider installing the inverter in a cool, well-ventilated area to prevent overheating and ensure maximum efficiency.
- Regularly check the WiFi connection status if using the monitoring feature to ensure continuous data logging and remote access.
10. Warranty and Support
All EASUN POWER products come with a 1-year warranty period from the date of purchase. For technical support, troubleshooting assistance, or warranty claims, please contact your seller or EASUN POWER customer service.
