1. Introduction
This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of your EASUN Hybrid Solar Inverter, model ISolar-SMH-III-6.2KW. This pure sine wave inverter is designed for both home appliances and personal computers, offering a configurable input voltage range, battery charging current, and AC/Solar charger priority. It is compatible with mains voltage or generator power and features overload, over-temperature, and short-circuit protection, along with a smart battery charger design for optimized battery performance and a cold start function. WIFI/GPRS connectivity is optional for remote monitoring.
The inverter has a rated power of 6200VA/6200W and a 48VDC battery system. It supports a maximum PV array power of 6000W with an MPPT operating voltage range of 55-450VDC and a maximum PV array open circuit voltage of 450VDC. The maximum charging current is 120A.
2. Safety Information
Please read all instructions and warnings carefully before installation and operation. Keep this manual for future reference. Only qualified personnel should perform installation and maintenance. Ensure all power sources are disconnected before performing any wiring or maintenance. Always connect the ground wire properly.
Important Safety Precautions:
- Do not attempt to repair the unit yourself. Refer to qualified service personnel.
- Ensure proper ventilation around the inverter to prevent overheating.
- Keep the inverter away from flammable materials and moisture.
- Verify correct polarity when connecting batteries and PV modules.
- Use appropriate wiring and circuit breakers as per local electrical codes.
3. Product Overview
The EASUN Hybrid Solar Inverter is a versatile unit designed to manage power from solar panels, batteries, and the utility grid. It features an LCD display for monitoring and configuration, along with LED indicators for status updates and function keys for navigation.
3.1. Key Features
- Pure sine wave solar inverter (on/off Grid)
- Output power factor 1.0
- Inverter can run without battery
- Built-in Lithium battery automatic activation
- Dual communication ports for Battery communication and Wifi communication
- Built-in 120AMPPT Solar charge; max 6200W (for 3.6KW/4.2KW), max 6500W (for 6.2KW)
- High PV input voltage range (60~500VDC)
- Built-in anti-dust kit for harsh environment
- Smart battery charger design to optimize battery life
- WIFI & GPRS available for iOS and Android
- Dual output
4. Installation
This section outlines the steps for installing the EASUN Hybrid Solar Inverter. Please ensure all safety precautions are followed before proceeding.
4.1. Physical Installation
The inverter should be mounted on a sturdy vertical surface in a well-ventilated area, away from direct sunlight, heat sources, and moisture. Ensure sufficient clearance around the unit for proper airflow.
4.2. Wiring Connections
Refer to the following steps and diagrams for proper wiring. Always ensure power is OFF before making any connections.
- Connect the positive and negative battery terminals:
Carefully connect the positive (red) and negative (black) battery cables to the corresponding terminals on the inverter. Ensure a secure connection.
Video 4.2.1: Connecting battery terminals (0:09 - 0:21 in installation video). 
Figure 4.2.2: 48VDC Battery Connection Diagram. The 6.2KW model supports a 48VDC system, typically achieved by connecting four 12V batteries in series. - Connect the positive and negative PV terminals:
Connect the solar panel (PV) positive and negative cables to the designated PV input terminals on the inverter. Ensure correct polarity and secure connections.
Video 4.2.3: Connecting PV terminals (0:25 - 0:33 in installation video). 
Figure 4.2.4: PV Connection Diagram for iSolar SMG II 6.2KP. When selecting PV modules, ensure the open circuit voltage (Voc) of PV modules does not exceed the maximum PV array open circuit voltage of the inverter, and the Voc of PV modules should be higher than the minimum battery voltage. 
Figure 4.2.5: PV Connection Diagram for iSolar SMG III 6.2KP. When selecting PV modules, ensure the open circuit voltage (Voc) of PV modules does not exceed the maximum PV array open circuit voltage of the inverter, and the Voc of PV modules should be higher than the minimum battery voltage. 
Figure 4.2.6: PV Connection Diagram for iSolar SMH III 6.2KW WIFI. When selecting PV modules, ensure the open circuit voltage (Voc) of PV modules does not exceed the maximum PV array open circuit voltage of the inverter, and the Voc of PV modules should be higher than the minimum battery voltage. - Connect the positive and negative AC input terminals:
Connect the AC input cables (Live, Neutral) to the appropriate AC input terminals on the inverter. Ensure these connections are tight and secure.
Video 4.2.7: Connecting AC input terminals (0:34 - 0:42 in installation video). - Connecting ground:
Connect the ground wire to the designated ground terminal on the inverter. This is a critical safety step.
Video 4.2.8: Connecting ground (0:43 - 0:47 in installation video). - Install WIFI (Optional):
If your model includes WIFI functionality, connect the WIFI module to the designated communication port. This allows for remote monitoring and control.
Video 4.2.9: Installing WIFI module (0:01 - 0:08 and 1:02 - 1:07 in installation video).
4.3. Parallel Operation
The inverter supports parallel operation for increased power output. The 6.2KW model can be operated in parallel with up to nine inverters in a single phase configuration.
5. Operation
Once the inverter is installed and wired, follow these steps to begin operation and configure settings.
5.1. Initial Power-Up
- Turn on the battery and inverter switch:
After all connections are secure, turn on the battery switch first, then the inverter's power switch. Wait for the parameter display to appear on the LCD screen.
Video 5.1.1: Turning on battery and inverter switches (0:47 - 1:01 in installation video).
5.2. LCD Display and Function Keys
The inverter features an LCD display for real-time monitoring and configuration. Use the function keys to navigate menus and adjust settings.
| 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. |
| A FAULT | Red | Solid On: Fault occurs in the inverter. Flashing: Warning condition occurs in the inverter. |
| 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 |
5.3. Configuration Settings
The inverter allows for various configurable settings via the LCD display:
- Configurable input voltage range for home appliances and personal computers.
- Configurable battery charging current based on applications.
- Configurable AC/Solar Charger priority.
Refer to the detailed settings menu in the full product manual (if available) for specific parameter adjustments.
6. Specifications
Below are the detailed technical specifications for the EASUN Hybrid Solar Inverter ISolar-SMH-III-6.2KW.
| Category | Parameter | Value |
|---|---|---|
| General | Model | ISolar-SMH-III-6.2KW |
| Rated Power | 6200VA/6200W | |
| Input | Voltage | 230Vac |
| Selectable Voltage Range | (170Vac~280Vac)±2% (for personal computers); (90Vac-280Vac)±2% (for home appliances) | |
| Frequency Range | 50Hz/60Hz (Autodetection) | |
| Output | AC Voltage Regulation (Batt. Mode) | 230VAC±5% |
| Surge Power | 14000VA | |
| Transfer Time | 10ms (for personal computers) / 20ms (for home appliances) | |
| Waveform | Pure Sine Wave | |
| Battery & AC Charger | Battery Voltage | 48VDC |
| Floating Charge Voltage | 54VDC | |
| Overcharge Protection | 61VDC | |
| Maximum Charge Current | 120A | |
| Solar Charger | MAX. PV Array Power | 6000W |
| MPPT Range @ Operating Voltage | 55-450VDC | |
| Maximum PV Array Open Circuit Voltage | 450VDC | |
| Maximum Charging Current | 120A | |
| Physical | Dimension (D*W*H) | 423x310x120mm |
| Net Weight | 10.0kg | |
| Communication Interface | RS232/RS485 (Standard) / GPRS/WIFI (Optional) | |
| Operating Environment | Humidity | 5% to 95% Relative Humidity (Non-condensing) |
| Operating Temperature | 5°C to 55°C | |
| Storage Temperature | 5°C to 60°C |
*Note: Specifications are subject to change without prior notice. Always refer to the product label for the most accurate information.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your EASUN Hybrid Solar Inverter.
- Cleaning: Keep the inverter's exterior clean and free from dust. The unit features a built-in anti-dust kit for harsh environments, but periodic cleaning of vents is recommended.
- Connections Check: Periodically inspect all wiring connections (battery, PV, AC input/output, ground) to ensure they are tight and free from corrosion.
- Battery Health: The smart battery charger design optimizes battery life. However, regularly monitor battery voltage and performance, especially if you notice reduced backup time.
- Environment: Ensure the operating environment remains within specified temperature and humidity ranges.
- Firmware Updates: Check the manufacturer's website for any available firmware updates for your model, especially if using the optional WIFI/GPRS module.
8. Troubleshooting
This section provides guidance for common issues you might encounter with your inverter. For more complex problems, contact customer support.
| Problem | LED Indicator / Display | Possible Cause | Solution |
|---|---|---|---|
| No power / Inverter not turning on | Display off, no LEDs | No battery connection, low battery voltage, inverter switch off. | Check battery connections and voltage. Ensure inverter power switch is ON. Charge batteries if voltage is too low. |
| No AC output | AC/INV LED Solid On (Green) or Flashing (Green) | Overload, short circuit, over-temperature, AC input not present. | Reduce load. Check for short circuits in connected appliances. Allow inverter to cool down. Verify AC input connection. |
| Fault condition | A FAULT LED Solid On (Red) | A fault has occurred in the inverter. | Note any error codes on the LCD. Turn off the inverter, disconnect all power sources, wait a few minutes, then restart. If the fault persists, contact customer support. |
| Warning condition | A FAULT LED Flashing (Red) | A warning condition exists, but the inverter may still be operating. | Check the LCD display for specific warning messages. Address the underlying issue (e.g., high temperature, input voltage out of range). |
| Battery not charging | CHG LED Flashing (Green) or off | PV input issue, AC input issue, battery fault, incorrect charging settings. | Check PV connections and voltage. Verify AC input is present. Inspect battery health. Review charging current and priority settings via LCD. |
9. Warranty and Support
EASUN POWER is committed to providing high-quality products and customer satisfaction. This product comes with certain guarantees and support services.
9.1. Returns and Refunds
- Free Returns: Enjoy free returns within 15 days of delivery.
- Late Delivery Compensation: Collect a $1.00 coupon code if your delivery is delayed.
- Refund for Issues: Refunds are available if the package is lost or if items are damaged upon arrival.
- Delivery Guarantee: Full refund if no delivery within 60 days.
9.2. Customer Service
For any questions, technical assistance, or warranty claims, please contact EASUN POWER Flagship Store customer service. Ensure you have your product model number and purchase details ready.
Store Name: EASUN POWER Flagship Store
Seller ID: cn1076568331fvqae
Positive Feedback: 90.7%
9.3. Security & Privacy
Your security and privacy are important. Payments are safe, and personal details are protected and kept secure, not shared with third parties without consent.
