1. Introduction
This manual provides essential information for the safe and efficient operation of your EASUN POWER iSolar SMG II Series Hybrid Solar Inverter. This series includes 2KW, 3.2KW, and 4KW models, designed to provide reliable power for various applications. Please read this manual thoroughly before installation and use.
Key Features:
- Pure sine wave inverter output.
- Built-in MPPT solar charge controller for efficient solar energy harvesting.
- WIFI-GPRS remote monitoring capability.
- Supports connection of both lead-acid and lithium batteries.
- Compatible with mains voltage or generator power.
- Comprehensive protection features: short circuit, overvoltage, undervoltage, overload, and back-filling protection.
- Configurable input voltage range for home appliances and personal computers via LCD settings.
- Configurable battery charging current based on application via LCD settings.
Video: Unboxing the EASUN POWER MPPT Hybrid Inverter, showing its components and initial setup.
2. Specifications
The following table details the specifications for the iSolar SMG II series hybrid solar inverters:
| MODEL | SMG-II-2KW-12V-WiFi | SMG-II-3.2KW-24V-WiFi | SMG-II-4KW-24V-WiFi |
|---|---|---|---|
| CAPACITY | 2KVA/2KW | 3.2KVA/3.2KW | 4KVA/4KW |
| Support BMS | YES | NO | YES |
| With Wifi | YES | YES | YES |
| INPUT | |||
| Nominal Voltage | 220/230VAC | ||
| Acceptable Voltage Range | 170-280VAC (For personal Computer); 90-280VAC (For Home Appliances) | ||
| Frequency | 50/60Hz (Auto sensing) | ||
| OUTPUT | |||
| Nominal Voltage | 220/230VAC±5% | ||
| Surge Power | 3000VA | 7000VA | 7000VA |
| Wave form | Pure Sine wave | ||
| Transfer Time | 10Ms (For personal Computer); 20Ms (For Home Appliances) | ||
| Peak Efficiency (PV to INV) | 96% | 96% | 96% |
| Peak Efficiency (Battery to INV) | 93% | 93% | 93% |
| Over load Protection | 5s@>=150%load; 10s@110%-150%load | ||
| Power Factor | 1 | ||
| BATTERY | |||
| Battery Voltage | 12VDC | 24VDC | 24VDC |
| Floating Charge Voltage | 13.5VDC | 27VDC | 27VDC |
| Over Charge Protection | 14.1VDC | 28.2VDC | 33VDC |
| SOLAR CHARGER & AC CHARGER | |||
| Solar Charger TYPE | MPPT | ||
| Max.PV Array power | 900W | 4000W | 4000W |
| Max.PV Array Open Circuit Voltage | 160VDC | 500VDC | 500VDC |
| PV Array MPPT Voltage Range | 30VDC~160VDC | 30VDC ~ 500VDC | 60VDC ~ 500VDC |
| Max.Solar Input Current | 30A | 15A | 15A |
| Max.AC Charge Current | 80A | 60A | 80A |
| Max.Charge Current (AC+PV) | 120A | 100A | 100A |
| PHYSICAL | |||
| Dimensions, DxWxH (mm) | 358x295x105 | 330*278*100 | 358*295*100 |
| Net Weight (Kgs) | 6 | 6.5 | 7 |
| Communication Interface | RS232 / RS485 /WIFI | RS232 / WIFI | RS232 / RS485 /WIFI |
| ENVIRONMENT | |||
| Operating Temperature Range | -10℃ to 50℃ | ||
| Storage temperature | -15℃ to 60℃ | ||
| Humidity | 5% to 95% Relative Humidity (Non-condensing) | ||
3. Setup and Installation
3.1 Mounting the Unit
Consider the following points before selecting where to install the inverter:
- Do not mount the inverter on flammable construction materials.
- Mount on a solid surface.
- Install this inverter at eye level in order to allow the LCD display to be read at all times.
- The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
- The recommended installation position is to be adhered to the wall vertically.
- Be sure to keep other objects and surfaces as shown in the right diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
Diagram: Recommended mounting clearances for the inverter.
3.2 System Overview and Connections
The iSolar SMG II series hybrid solar inverter integrates solar charging, AC charging, and inverter functions to provide uninterruptible power support. Below are diagrams illustrating typical system configurations and connection points.
Diagram: Rear panel of the inverter with labeled connection ports.
- 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
System Diagram: Operation with Battery Connected
Diagram: Two typical system configurations for the hybrid inverter, showing connections to solar panels, optional generator/utility, battery packs, and home appliances.
3.3 Battery Connection
The 4KW model supports a 24VDC battery system. Ensure correct polarity when connecting batteries.
Diagram: 24VDC Battery Connection Diagram, typically using two 12V batteries in series.
3.4 PV Connection (Solar Panels)
When selecting proper PV modules, please be sure to consider the following parameters to ensure compatibility and optimal performance with your inverter model:
Diagram: PV Connection for iSolar SMG II 2KW WiFi model, including PV module selection parameters.
Diagram: PV Connection for iSolar SMG II 3.2KW WiFi model, including PV module selection parameters.
Diagram: PV Connection for iSolar SMG II 4KW WiFi model, including PV module selection parameters.
Important Considerations for PV Modules:
- Open circuit Voltage (Voc) of PV modules must 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.
4. Operation
4.1 Product Overview and Controls
Image: Inverter front panel with LCD display, function keys, and LED indicators.
4.2 LCD Display
The LCD display provides real-time information about the inverter's status and operation. If communication between the inverter and battery is successful, various information will be shown on the LCD.
Image: Detailed view of the LCD display showing various battery and charging parameters.
| Item | Description | LCD display |
|---|---|---|
| 1 | Communication successful icon | (Icon will be flashing) |
| 2 | Max lithium battery charging voltage | e.g., 56.0V |
| 3 | Max lithium battery charging current | e.g., 40A |
| 4 | Lithium battery discharging is forbidden | LI will flash once every 1 second |
| 5 | Lithium battery charging is forbidden | LI will flash once every 2 seconds |
| 6 | Lithium battery SOC (%) | e.g., 60% |
4.3 LED Indicators
The LED indicators provide a quick visual status of the inverter's operation:
| LED Indicator | Messages |
|---|---|
| AC / INV (Green) | Solid On: Output is powered by utility in Line mode. Flashing: Output is powered by battery or PV in battery mode. |
| CHG (Green) | Solid On: Battery is fully charged. Flashing: Battery is charging. |
| FAULT (Red) | Solid On: Fault occurs in the inverter. Flashing: Warning condition occurs in the inverter. |
4.4 Function Keys
Use the function keys on the front panel to navigate menus and configure settings:
| Function Keys | 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 |
5. Troubleshooting
Refer to the following table for common warning events and their indicators:
Table: Warning Indicators and corresponding events/alarms.
| Warning Code | Warning Event | Audible Alarm | Icon flashing |
|---|---|---|---|
| 02 | Temperature is too High | Beep three times every second | (Icon for temperature) |
| 04 | Low battery | Beep once every second | (Icon for low battery) |
| 07 | Overload | Beep once every 0.5 second | (Icon for overload) |
| 10 | Output power derating | Beep twice every 3 seconds | (Icon for power derating) |
| 14 | Fan blocked | None | (Icon for fan blocked) |
| 15 | PV energy is low | Beep twice every 3 seconds | (Icon for low PV energy) |
| 19 | Lithium Battery communication is failed | Beep once every 0.5 second | (Icon for lithium battery communication failure) |
| 21 | Lithium Battery over current | None | (Icon for lithium battery over current) |
| E9 | Battery equalization | None | (Icon for battery equalization) |
| bP | Battery is not connected | None | (Icon for battery not connected) |
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your hybrid solar inverter.
- Cleaning: Periodically clean the exterior of the inverter and ensure ventilation openings are free from dust and debris. Use a dry, soft cloth. Do not use liquid cleaners.
- Connections Check: Annually inspect all electrical connections (PV, battery, AC input/output) for tightness and signs of corrosion. Loose connections can lead to overheating and damage.
- Battery Health: Monitor battery voltage and performance regularly. For lead-acid batteries, check electrolyte levels if applicable. For lithium batteries, ensure BMS is functioning correctly.
- Environmental Check: Ensure the installation environment remains within the specified operating temperature and humidity ranges.
- Firmware Updates: Check the manufacturer's website for any available firmware updates for your model to ensure optimal performance and access to new features.
7. User Tips
- LiFePO4 Battery Compatibility: The inverter is capable of charging LiFePO4 batteries. Ensure your battery's BMS (Battery Management System) is compatible and correctly configured with the inverter's settings for optimal charging and protection.
- Optimal PV Sizing: When connecting solar panels, ensure the total PV array open circuit voltage (Voc) does not exceed the inverter's maximum limit and is above the minimum battery voltage for efficient charging. Refer to the PV Connection section for detailed parameters for each model.
- Ventilation: Always ensure adequate airflow around the inverter to prevent overheating, especially during high load operation. Maintain the recommended clearances as shown in the mounting diagram.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your authorized dealer or EASUN POWER customer service. Keep your purchase receipt and product serial number handy for faster service.
Regularly check the official EASUN POWER website for updated manuals, FAQs, and support resources.
