1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your EASUN POWER Hybrid Solar Inverter. This series includes models with power ratings from 2.2KW to 6.2KW, supporting 12V, 24V, and 48V battery systems. These inverters feature MPPT solar charge controllers, pure sine wave output, and are designed for off-grid applications. Please read this manual thoroughly before installation and use to ensure safe and optimal performance.
Image: Overview of EASUN POWER Hybrid Solar Inverter models.
2. Safety Information
Please observe the following safety precautions to prevent injury and damage to the inverter:
- Installation must be performed by qualified personnel.
- Do not attempt to disassemble or repair the inverter yourself.
- Ensure all wiring is correctly sized and connections are secure.
- Keep the inverter away from flammable materials, moisture, and direct sunlight.
- Ensure proper ventilation around the inverter to prevent overheating.
- Always disconnect all power sources (PV, battery, AC input) before performing any maintenance or wiring.
- Wear appropriate personal protective equipment (PPE) during installation and maintenance.
3. Product Overview
3.1. Front Panel and Indicators
Image: Front panel with LCD display, function keys, and LED indicators.
LED Indicators:
| LED Indicator | Status | Messages |
|---|---|---|
| AC / INV | Green Solid On | Output is powered by utility in Line mode. |
| Green Flashing | Output is powered by battery or PV in battery mode. | |
| CHG | Green Solid On | Battery is fully charged. |
| Green Flashing | Battery is charging. | |
| FAULT | Red Solid On | Fault occurs in the inverter. |
| Red 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 |
3.2. Rear Panel Connections
Image: Rear panel connections and their functions.
- Power on/off switch
- AC input
- Main output
- Second output
- PV input
- Battery communication/RS-485 port
- WIFI communication/RS-232 port
- Battery input
4. Setup
4.1. Mounting the Unit
Image: Mounting instructions and recommended clearances.
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.
- 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 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. System Diagram
Image: General system diagram for inverter operation with battery connected.
4.3. PV Connection
Image: PV connection diagram and recommended parameters.
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.
Example PV Parameters for iSolar SMH III 6.2KW WIFI:
| Parameter | Value | Notes |
|---|---|---|
| Maximum output power | 6500W | |
| Maximum PV open circuit voltage | 500VDC | |
| Maximum charge current | 120A | |
| Maximum Power (Pmax) | 250W | Max. PV module numbers in series: 13 x 36V = 450VDC |
| Max. Power Voltage Vmpp(V) | 36V | |
| Max. Power Current Impp(A) | 8.3A | PV module numbers in parallel: 13 x 8.3 < 120A |
| Open Circuit Voltage Voc(V) | 40V | Total PV module numbers: 13 x 2 = 26 |
| Short Circuit Current Isc(A) | 8.9A |
4.4. Battery Connection
Image: Battery connection diagrams for 24VDC and 48VDC systems.
The 4.2KW model supports a 24VDC system, and the 6.2KW model supports a 48VDC system. Ensure batteries are connected in series to achieve the required voltage.
Important Note:
- SMH III 6.2KW and SMH III 4.2KW models can operate without a battery.
- SMH II 3.2KW and SMH II 2.2KW models must be connected to a battery to function.
5. Operating Instructions
5.1. Key Features
The EASUN POWER Hybrid Solar Inverter offers a range of advanced features for efficient power management:
- Pure sine wave output, compatible with various loads (TV, refrigerator, computer, microwave, dishwasher, etc.).
- 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 function when AC power recovers.
- Comprehensive protection against overload, over temperature, and short circuits.
- Smart battery charger design for optimized battery performance and extended lifespan.
- Cold start function for reliable operation.
- High PV input voltage range (55-450VDC or 60-500VDC depending on model).
- Built-in MPPT solar charge controller (Max 80A for 2.2KW & 3.2KW; Max 120A for 4.2KW & 6.2KW).
- Compatible with Lithium-ion batteries and supports BMS communication.
- Dual communication ports for battery and WiFi communication.
- WIFI & GPRS available for iOS and Android monitoring (set option 05 to "USE" for WiFi).
- Dual output capability.
- Built-in anti-dust kit for harsh environments (optional).
Image: Pure Sine Wave Output and compatible loads.
5.2. Monitoring and Control via SmartESS App
The inverter supports remote monitoring and control through the SmartESS app, available for iOS and Android devices. A separate WIFI/GPRS data acquisition module is required and needs to be purchased separately to enable this feature.
Image: Monitoring and control via SmartESS App with optional WiFi module.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your inverter:
- Cleaning: Periodically clean the exterior of the inverter and ensure ventilation openings are free from dust and debris. Use a dry, soft cloth.
- Connection Checks: Annually inspect all electrical connections (PV, battery, AC input/output) for tightness and signs of corrosion.
- Environmental Check: Ensure the installation environment remains within specified temperature and humidity ranges.
- Firmware Updates: Check the manufacturer's website for any available firmware updates to ensure your inverter has the latest features and bug fixes.
- Battery Health: If using batteries, regularly monitor their health and charge status as per battery manufacturer guidelines.
7. Troubleshooting
If you encounter issues with your inverter, refer to the LED indicators and LCD display for error codes or warnings. Here are some general troubleshooting steps:
- No Power: Check the main power switch, battery connections, and AC input. Ensure PV panels are receiving sunlight.
- Fault/Warning LED: Consult the LED indicator table in Section 3.1. for specific fault messages.
- No Output: Verify that the inverter is in the correct operating mode (Line, Battery, or PV priority). Check for overload conditions.
- Battery Not Charging: Inspect PV connections and ensure solar panels are producing power. Check battery charging current settings.
- Overload Protection: Reduce the load connected to the inverter. The inverter will typically restart automatically after an overload condition is cleared.
For persistent issues, contact customer support with details of the problem, any error codes, and your inverter model.
8. Specifications
Image: Detailed specifications for various SMH inverter models.
| Parameter | SMH-II-2.2KW-12V WIFI | SMH-II-3.2KW-24V WIFI | SMH-III-4.2KW-24V WIFI | SMH-III-6.2KW-48V 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% | |||
| Surge Power | 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 Volt | 55-450VDC | 55-450VDC | 60VDC-500VDC | 60VDC-500VDC |
| 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 | 5kg | 9.0kg | 10kg |
| Communication Interface | RS232/RS485/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. User Tips
No specific user tips or frequently asked questions were available from customer reviews or Q&A for this product at the time of manual creation. For general best practices:
- Regularly check the LCD display for system status and any warning messages.
- Ensure all cables are properly secured and protected from environmental factors.
- Optimize your battery charging settings via the LCD to match your battery type and usage patterns for maximum lifespan.
- If using the WiFi module, ensure a stable internet connection for reliable remote monitoring.
10. Warranty and Support
For warranty information, technical support, or service requests, please contact your original point of purchase or the EASUN POWER customer service department. Keep your purchase receipt and product serial number handy when contacting support.
