1. Introduction
This manual provides essential information for the safe and efficient operation of your EASUN POWER Hybrid Solar Inverter. Please read this manual thoroughly before installation and use. It covers various models within the iSolar SMH series, including 2.2KW, 3.2KW, 4.2KW, and 6.2KW variants, offering pure sine wave output and MPPT charging capabilities for off-grid solar applications.
2. Key Features
- Pure sine wave inverter output.
- Configurable input voltage range for home appliances and personal computers via LCD setting.
- Configurable battery charging current based on applications via LCD setting.
- Configurable AC/Solar Charger priority via LCD setting.
- Compatible with mains voltage or generator power.
- Auto restart while AC is recovering.
- Overload, over temperature, and short circuit protection.
- Smart battery charger design for optimized battery performance.
- Cold start function.
- Built-in MPPT solar charge controller with high PV input voltage range (55-450VDC or 60-500VDC depending on model).
- WiFi & GPRS available for iOS and Android monitoring.
- Dual output (available on some models).
- Built-in anti-dust kit.
- Built-in Lithium battery automatic activation (for models with BMS).
3. Safety Information
Please observe the following safety precautions to reduce the risk of injury or damage:
- Read all instructions thoroughly before installation and operation.
- Do not attempt to disassemble or repair the unit yourself. Refer all servicing to qualified personnel.
- Ensure proper ventilation around the inverter to prevent overheating. Maintain recommended clearances.
- Connect the inverter only to compatible power sources and loads as specified in this manual.
- High voltage is present within the unit. Exercise extreme caution and always disconnect all power sources before performing any maintenance or wiring.
- This inverter is suitable for mounting on concrete or other non-combustible surfaces only.
4. Package Contents
Upon unpacking, please ensure all items are present and undamaged:
- EASUN POWER Hybrid Solar Inverter Unit
- User Manual
- Communication Cables (RS232/RS485/GPRS/WIFI modules may be included or optional depending on model)
Video: Unboxing and initial overview of the EASUN POWER Hybrid Solar Inverter.
5. Product Overview
5.1 Front Panel
Image: Front panel of the inverter with LCD display, function keys, and LED indicators labeled.
LED Indicators
| 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
| 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 Rear Panel
Image: Rear panel of the inverter with labeled connection ports including AC input, outputs, PV input, battery input, and communication ports.
- Power on/off switch
- AC input
- Main output
- Second output
- PV input
- Battery communication/RS-485 port
- WIFI communication/RS-232 port
- Battery input
6. Installation and Setup
6.1 Mounting the Unit
Image: Diagram illustrating recommended mounting position and clearance requirements for the inverter.
- Do not mount the inverter on flammable construction materials.
- Mount 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 approx. 20 cm to the side and approx. 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 away as shown in the 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.
6.2 Wiring Diagrams
System Diagram
Image: Illustrates various operational scenarios including solar power available, AC power available, and combinations with and without battery connection.
PV Connection
Image: PV connection diagram with guidelines for selecting appropriate PV modules.
When selecting proper PV modules, please be sure to consider below parameters:
- Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
- Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.
| INVERTER MODEL | iSolar SMH III 6.2KW WIFI |
|---|---|
| Maximum PV output power | 6500W |
| Maximum PV open circuit voltage | 500VDC |
| Maximum charge current | 120A |
| Maximum Power (Pmax) | 250W |
| Max.Power Voltage Vmpp(V) | 36V |
| Max.Power Current Impp(A) | 8.3A |
| Open Circuit Voltage Voc(V) | 40V |
| Short Circuit Current Isc(A) | 8.9A |
Note: Max.PV module numbers in series: 13 x 36V ≈60~450VDC. PV module numbers in parallel: 13 x 8.3 < 120A. Total PV module numbers: 13 x 2 = 26.
Battery Connection
Image: Diagrams illustrating how to connect batteries for 24VDC and 48VDC systems.
The 4.2KW model supports a 24VDC system, and the 6.2KW model supports a 48VDC system. Ensure correct polarity and secure connections when wiring batteries.
7. Operation
7.1 LCD Display and Function Keys
The LCD display provides real-time information about the inverter's status, input/output voltages, battery levels, and more. Use the function keys (ESC, UP, DOWN, ENTER) to navigate through menus and configure settings as described in Section 5.1.
7.2 Operating Modes
The inverter can operate in various modes depending on the availability of solar power, AC power, and battery connection. Refer to the System Diagram in Section 6.2 for a visual representation of these modes:
- Operation without battery connected: The inverter can supply power directly from solar or AC sources to the load.
- Operation with battery connected: The inverter can utilize solar power, AC power, and battery power to supply the load and charge the batteries.
7.3 Monitoring via SMARTESS App
Image: Illustration of monitoring and controlling the inverter via the SMARTESS app.
The inverter supports remote monitoring and control via the SMARTESS app, available for iOS and Android devices. To enable this feature, connect the optional WiFi module to the designated port on the rear panel. The app allows you to view system status, energy production, consumption, and adjust certain settings remotely.
8. Specifications
| MODEL | SMH-II-2.2KW-WIFI | SMH-II-3.2KW-WIFI | SMH-III-4.2KW-WIFI | SMH-III-6.2KW-WIFI |
|---|---|---|---|---|
| Rated Power | 2200VA/1800W | 3200VA/3000W | 4200VA/4200W | 6200VA/6200W |
| WIFI | YES | YES | YES | YES |
| BMS | NO | NO | YES | YES |
| Work Without Battery | NO | NO | YES | YES |
| INPUT | ||||
| Voltage | 230VAC | |||
| Selectable Voltage Range | 170-280VAC (for personal computers); 90-280VAC (for home appliances) | |||
| Frequency Range | 50Hz/60Hz (Autosensing) | |||
| OUTPUT | ||||
| AC Voltage Regulation (Batt. Mode) | 230VAC±5% | |||
| Surgepower | 4400VA | 6400VA | 8400VA | 12400VA |
| Transfer Time | 10ms (for personal computers), 20ms (for home appliances) | |||
| Wave form | Pure Sine Wave | |||
| BATTERY & AC CHARGER | ||||
| Battery Voltage | 12VDC | 24VDC | 24VDC | 48VDC |
| Floating Charge Voltage | 13.5VDC | 27VDC | 27VDC | 54VDC |
| Over charge Protection | 15.5VDC | 31VDC | 30VDC | 60VDC |
| Max. AC Charge Current | 60A | 60A | 100A | 100A |
| SOLAR CHARGER | ||||
| MAX. PV Array Power | 2000W | 3000W | 6200W | 6500W |
| MPPT Range @ Operating Voltage | 55-450VDC | 55-450VDC | 60VDC~450VDC | 60VDC~450VDC |
| Maximum PV Array Open Circuit Voltage | 450VDC | 450VDC | 500VDC | 500VDC |
| Maximum Charging Current | 80A | 80A | 120A | 120A |
| Maximum Efficiency | 98% | |||
| PHYSICAL | ||||
| Dimension.D*W*H(mm) | 405x286x98mm | 405x286x98mm | 420*350*110mm | 420*350*110mm |
| Net Weight (kgs) | 4.5kg | 5.0kg | 9.0kg | 10kg |
| Communication Interface | RS232/RS485 (Standard)/GPRS/WIFI | |||
| OPERATING ENVIRONMENT | ||||
| Humidity | 5% to 95% Relative Humidity (Non-condensing) | |||
| Operating Temperature | -10°C to 55°C | |||
| Storage Temperature | -15°C to 60°C | |||
9. Troubleshooting
- Inverter not turning on: Check all battery connections, AC input, and ensure the power on/off switch is in the 'on' position.
- No output power: Verify load connections. Check the LCD for any overload or short circuit protection activation. Reduce the load if necessary.
- PV input issues: Ensure PV modules are correctly connected with proper polarity. Confirm that the PV array open circuit voltage is within the inverter's specified limits (e.g., 240V works perfectly, but 485V might be out of range and could damage the inverter). Check for sufficient sunlight.
- Battery not charging: Check battery connections and ensure they are secure. Verify the charging current settings on the LCD. Confirm that solar panels are producing sufficient power.
- Error codes on LCD: If an error code appears, consult the detailed troubleshooting section in the complete user manual for specific remedies.
10. User Tips
- PV Module Selection: Always ensure the PV module open circuit voltage (Voc) does not exceed the inverter's maximum PV array open circuit voltage. Additionally, Voc should be higher than the minimum battery voltage for efficient charging.
- Battery-less Operation: Models SMH-III-4.2KW-WIFI and SMH-III-6.2KW-WIFI are designed to operate without batteries, providing flexibility in system design. Other models may require battery connection for full functionality.
- Remote Monitoring: Maximize convenience by utilizing the SMARTESS app for remote monitoring and control. Ensure the optional WiFi module is connected and configured.
- Battery Compatibility: The inverter supports various battery types. When connecting, ensure your battery voltage (e.g., 12V, 24V, 48V) matches the inverter's requirements for the specific model.
- Professional Installation: For optimal performance, safety, and compliance with local regulations, consider consulting a qualified solar technician for system design and installation.
11. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your inverter:
- Regular Cleaning: Keep the inverter's ventilation openings and external surfaces clean and free from dust and debris to ensure proper airflow and heat dissipation.
- Connection Checks: Periodically inspect all electrical connections (PV, battery, AC input/output) for tightness and signs of corrosion. Tighten any loose connections.
- Firmware Updates: Check the manufacturer's official website for any available firmware updates. Updating firmware can improve performance, add new features, or address known issues.
- Battery Maintenance: If using batteries, follow the battery manufacturer's guidelines for regular maintenance, including checking electrolyte levels (for flooded batteries) and terminal cleanliness, to prolong battery life.
12. Warranty and Support
For detailed warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. It is recommended to keep your purchase receipt or invoice as proof of purchase for warranty claims.
