1. Introduction and Overview
This manual provides essential information for the safe and efficient operation of your EASUN Hybrid Solar Inverter. This device is a versatile solution for off-grid solar power systems, integrating a pure sine wave inverter, an MPPT solar charge controller, and a battery charger into one compact unit. It is designed to provide uninterrupted power to your home or office, supporting various loads from personal computers to home appliances.
The inverter features a smart battery charger design to optimize battery performance and includes protection against overload, overtemperature, and short circuits. It also offers customizable settings for input voltage range, battery charging current, and AC/solar charger priority via its LCD interface.
2. Features
- Pure Sine Wave Hybrid Solar Inverter for clean and stable power output.
- Customizable input voltage range for both home appliances and personal computers via LCD settings.
- Adjustable battery charging current to suit various battery types and applications.
- Configurable AC/Solar charger priority to optimize energy usage.
- Compatible with utility mains voltage or generator power.
- Automatic restart function during AC recovery for continuous operation.
- Comprehensive protection against overload, overtemperature, and short circuits.
- Intelligent battery charger design to enhance battery performance and lifespan.
- Cold start function for reliable operation in various conditions.
- WIFI connectivity for remote monitoring and control (requires setting option 05 to "USING").
- Built-in MPPT Solar charge controller with a high PV input voltage range (60-500VDC).
- Integrated anti-dust kit for enhanced durability in harsh environments.
- Dual output capability (available on 4.2KW and 6.2KW models).
3. Specifications
| Feature | SMH-III-6.2KW | SMH-III-4.2KW | SMH-II-3.2KW | SMH-II-2.2KW |
|---|---|---|---|---|
| Rated Power | 6200VA/6200W | 4200VA/4200W | 3200VA/3000W | 2.2KVA/1.8KW |
| Parallel Capability | NO | |||
| Work without Battery | YES | NO | ||
| INPUT | ||||
| Voltage | 230Vac | |||
| Acceptable Voltage Range | 170-280VAC (for personal Computer); 90-280VAC (for Home Appliances) | |||
| Frequency Range | 50Hz/ 60Hz (Auto detection) | |||
| OUTPUT | ||||
| Nominal Voltage | 230VAC ± 5% | |||
| Output Type | Dual output | Single output | ||
| Surge Power | 14000VA | 8000VA | 6400VA | 4400VA |
| Transfer Time | 10ms (for personal computers) / 20ms (for home appliances) | |||
| Wave form | Pure Sine Wave | |||
| BATTERY & AC CHARGER | ||||
| Battery Voltage | 48VDC | 24VDC | 24VDC | 12VDC |
| Floating Charge Voltage | 54VDC | 27VDC | 27VDC | 13.5VDC |
| Overcharge Protection | 61VDC | 31VDC | 31VDC | 15.5VDC |
| Maximum charge current | 80A | 80A | 60A | 60A |
| SOLAR CHARGER | ||||
| MAX.PV Array Power | 6500W | 6200W | 3000W | 2000W |
| MPPT Range & Operating Voltage | 60VDC ~ 500VDC | 90-430VDC | ||
| Maximum PV Array Open Circuit Voltage | 450VDC | |||
| Maximum Charging Current | 120A | 120A | 80A | 80A |
| Maximum Efficiency | 98% | |||
| PHYSICAL | ||||
| Dimension.D * W * H(mm) | 330*334*423 | 405*286*98 | 405x286x98 | |
| Net Weight (kgs) | 10 | 9.5 | 5 | 4.5 |
| Communication Interface | RS485 + RS232/WIFI/GPRS | RS232/WIFI/GPRS | ||
| ENVIRONMENT | ||||
| Operating Temperature | -10℃ ~ 50℃ | |||
4. Setup and Installation
4.1. Mounting the Unit
- Do not mount the inverter on flammable construction materials.
- Mount the inverter on a solid surface.
- Install this inverter at eye level to allow the LCD display to be read at all times.
- For proper air circulation to dissipate heat, allow a clearance of approximately 20 cm to the side and approximately 50 cm above and below the unit.
- 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 diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.
WARNING: SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
4.2. PV Connection
When selecting proper PV modules, please be sure to consider the following parameters:
- Open circuit Voltage (Voc) of PV modules should not exceed max. PV array open circuit voltage of inverter.
- Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.
Connecting in series will increase the voltage. This voltage needs to be between our PV voltage range (60~450VDC). Please check the open circuit voltage of your solar panels first. Ensure that the total power of solar panels does not exceed the maximum power of the inverter.
4.3. Battery Connection
The 4.2KW model supports a 24VDC battery system, and the 6.2KW model supports a 48VDC battery system. Ensure correct polarity and secure connections.
4.4. Inverter Connections Overview
Familiarize yourself with the various input and output ports on the inverter for proper wiring.
Key Connection Points:
- LCD Display
- LED Indicators
- Function keys
- Power on/off switch
- AC input
- Main output
- Second output
- PV input
- Battery communication/RS-485 port
- WIFI communication/RS-232 port
- Battery input
5. Operating Instructions
5.1. Product Overview: LCD Display, LED Indicators, and Function Keys
The inverter features an intuitive LCD display, LED indicators, and function keys for easy monitoring and control.
LED Indicator Messages
| LED Indicator | Color | 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. |
Function Keys Description
| 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 |
5.2. Pure Sine Wave Output
The inverter provides a pure sine wave output, which is the same voltage waveform as the grid. This ensures high-quality AC power with higher efficiency, stable output, and high compatibility, allowing it to drive various sensitive electronic loads without interference.
5.3. System Diagram and Operation Modes
The inverter supports various operation modes depending on the availability of solar power, AC power, and battery connection.
Operation Modes:
- Solar Power and AC Power available: The system prioritizes solar power to supply loads and charge batteries, with AC power as a backup.
- Solar Power and AC Power not available: The system draws power from the batteries to supply loads.
- Operation without battery connected (for 4.2KW and 6.2KW models): If solar power is available, it directly powers the loads. If AC power is available, it powers the loads.
- Operation with battery connected: The system intelligently manages power flow between solar, AC, battery, and loads.
6. Monitoring and Control via SmartESS App
The EASUN Hybrid Solar Inverter can be monitored and controlled remotely using the SmartESS App, available for both iOS and Android devices. An optional WIFI module is required for this functionality. Ensure the inverter's option 05 is set to "USING" to enable WIFI communication.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your inverter. Perform the following checks periodically:
- Keep the inverter clean and free from dust. The built-in anti-dust kit helps, but occasional cleaning is recommended.
- Ensure all electrical connections are tight and free from corrosion.
- Verify that the ventilation openings are not blocked to allow for proper heat dissipation.
- Check for any unusual noises or smells coming from the unit.
- Monitor the LCD display for any warning or fault messages.
8. Troubleshooting
If you encounter issues with your EASUN Hybrid Solar Inverter, consider the following common troubleshooting steps:
- No Power Output: Check all input and output connections. Ensure the power on/off switch is in the 'on' position. Verify that the battery voltage is within the acceptable range and that PV input is sufficient if operating without a battery.
- Battery Not Charging: Check PV panel connections and ensure sufficient sunlight. Verify AC input if using utility charging. Check battery connections and ensure the battery charging current settings are appropriate.
- Inverter Fault/Warning: Refer to the LED indicator messages table in Section 5.1 for specific fault codes and their meanings. Consult the full user manual for detailed troubleshooting steps for each code.
- Battery Compatibility: Ensure your battery type and voltage are compatible with the inverter model. For example, a 4.2KW inverter supports a 24VDC system. While a 4.2KW inverter can support a 300 Ampere lithium battery, ensure the battery's voltage matches the inverter's system voltage (e.g., 24V for 4.2KW).
- Dry Contact Functionality: If you require dry contact functionality, please refer to the detailed product specifications or contact customer support to confirm if your specific model supports configurable dry contacts.
9. User Tips
- For SMH III 6.2KW and SMH III 4.2KW models, the inverter can operate without batteries, provided the PV input voltage consistently exceeds at least 160V.
- SMH II 3.2KW and 2.2KW inverters require a connected battery to function.
- To enable WIFI monitoring, ensure you set option 05 on the LCD display to "USING" before attempting to connect via the SmartESS App.
- Always ensure adequate ventilation around the inverter to prevent overheating, especially during peak operation.
10. Warranty and Support
EASUN POWER products are designed for a useful life of 1 to 5 years. In the event of any issues, customer support aims to provide a response within 12 hours. For technical assistance, warranty claims, or further inquiries, please contact your seller or EASUN POWER customer service directly.
Please retain your purchase receipt as proof of purchase for warranty purposes.
