1. Introduction
This manual provides essential information for the safe and efficient operation of your EASUN Hybrid Solar Inverter. Please read this manual thoroughly before installation and use. The EASUN Hybrid Solar Inverter is a versatile device designed for off-grid solar power systems, featuring a pure sine wave output, a built-in MPPT solar charge controller, and various protection mechanisms.
Key Features:
- Pure sine wave solar inverter
- High PV input voltage range (60V-500VDC)
- Built-in MPPT solar charge controller
- Ability to run without a battery (PV voltage needs to be above 160V)
- WIFI-GPRS remote monitoring capability
- Auto restart while AC is recovering
- Configurable AC/Solar Charging priority via LCD setting
- Overload, over temperature, and short circuit protection
2. Specifications
The following table details the specifications for various models of the EASUN Hybrid Solar Inverter:
| Parameter | 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% |
| Overload 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 | 330x278x100 | 358x295x100 |
| 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:
- 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.
3.2 Wiring Connections
Refer to the following steps and diagrams for proper wiring. Ensure all power sources are disconnected before making any connections.
- Connect Battery Terminals: Connect the positive (red) and negative (blue/black) battery cables to the corresponding terminals on the inverter. Ensure a secure connection.
- Connect AC Input: Connect the AC input wires (Line, Neutral, Ground) to the 'AC IN' terminal block.
- Connect PV Input: Connect the PV (solar panel) input wires to the 'PV IN' terminal block.
- Connect AC Output: Connect your AC loads to the 'AC OUT' terminal block.
- Connect WiFi Module: Plug the WiFi module into the designated communication port (RS232 or RS485) on the inverter.
For a visual guide on the connection process, please watch the official installation video:
4. Operation
4.1 System Diagram
The inverter integrates various power sources to supply your home appliances. It can operate with or without a battery connected, depending on the PV input voltage.
4.2 LCD Display and Controls
The inverter features an LCD display and several buttons for monitoring and configuration.
LED Indicators:
- INV / AC (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.
Function Keys:
- 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.
4.3 PV Connection Considerations
When selecting proper PV modules, please be sure to consider the following parameters:
- Open circuit Voltage (Voc) of PV modules must not exceed max. PV array open circuit voltage of inverter.
- Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.
5. Troubleshooting
The inverter provides warning indicators and audible alarms for various events. Refer to the table below for common warning codes and their descriptions:
If a warning or fault occurs, consult this table to identify the issue. For persistent problems, contact customer support.
6. Maintenance
To ensure optimal performance and longevity of your EASUN Hybrid Solar Inverter, regular maintenance is recommended:
- Keep the inverter clean and free from dust and debris. Ensure ventilation openings are not blocked.
- Periodically check all wiring connections for tightness and signs of corrosion.
- Inspect the unit for any visible damage or unusual noises.
- Ensure the ambient temperature remains within the specified operating range.
7. User Tips
- For optimal battery life, ensure your battery type settings on the inverter match your actual battery chemistry (e.g., AGM, Lithium).
- Monitor your system regularly using the LCD display or the WiFi monitoring feature to track performance and identify potential issues early.
- When running without a battery, ensure your PV array voltage consistently stays above 160V to maintain stable operation.
- Proper grounding is crucial for safety and system stability. Always ensure the inverter is correctly grounded.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact your vendor directly. Keep your purchase receipt as proof of purchase.
