1. Introduction
This multi-function inverter/charger combines the functions of an inverter, solar charger, and battery charger to provide uninterruptible power support in a portable size. Its comprehensive LCD display allows for user-configurable and easily accessible button operation, including battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications.
Key Features:
- Pure sine wave inverter
- 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/short circuit protection
- Smart battery charger design for optimized battery performance
- Cold start function
- WIFI (Optional)
- Can connect to lithium battery
- Intelligent fan speed adjustment
- Max PV Input up to 6500W (model dependent)
- Max PV Voltage 450VDC
- MPPT Range 55-450VDC / 60-500V (model dependent)
- Max Charging Current up to 120A (model dependent)
Note: For SMH II 7KW and SMH II 4.2KW models, these have been updated to SMH III 6.2KW and SMH III 4.2KW, featuring Dual Outputs that can work without a battery. For SMH II 3.2KW and 2.2KW models, the inverters must be connected to a battery to work.
2. Safety Information
CAUTION: ELECTRIC SHOCK HAZARD. ENERGY HAZARDOUS.
- Always ensure proper grounding and follow all local electrical codes during installation.
- Disconnect all power sources (AC, PV, and Battery) before servicing or making any connections.
- Do not mount the inverter on flammable construction materials.
- Mount on a solid, non-combustible surface only.
- Ensure adequate ventilation around the unit to prevent overheating.
3. Product Overview
3.1. Physical Description
The Easun Power Hybrid Solar Inverter features a robust design with a blue and white casing. It includes an LCD display and function keys on the front panel for easy monitoring and configuration. Various connection ports are located on the bottom and sides of the unit.
Image: Front view of the Easun Power Hybrid Solar Inverter Charger, showing the LCD display and branding.
Image: Detailed view of the inverter's LCD display, LED indicators, and function keys.
3.2. LCD Display, LED Indicators, and Function Keys
The LCD display provides real-time information about the inverter's status and parameters. LED indicators offer quick visual cues, and function keys allow for navigation and setting adjustments.
| LED Indicator | Messages |
|---|---|
| AC / INV (Green Solid On) | Output is powered by utility in Line mode. |
| AC / INV (Green Flashing) | Output is powered by battery or PV in battery mode. |
| CHG (Green Solid On) | Battery is fully charged. |
| CHG (Green Flashing) | Battery is charging. |
| FAULT (Red Solid On) | Fault occurs in the inverter. |
| FAULT (Red 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 |
3.3. Connection Ports
The inverter features various ports for connecting to batteries, solar panels, AC input, and AC output, as well as communication interfaces.
Image: Rear view of the inverter showing labeled connection ports.
- RS-232 Communication port
- Power on/off switch
- AC input
- AC output
- PV input
- Battery input
- Safety (Earth) ground
4. Installation
4.1. Mounting the Unit
Consider the following points before selecting where to install the inverter:
- Do not mount the inverter on flammable construction materials.
- Mount on a solid surface, preferably concrete or other non-combustible material.
- 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 sides and 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 clear as shown in the diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.
Image: Diagram illustrating recommended mounting clearances for the inverter.
4.2. Wiring Connections
Refer to the installation video and diagrams for detailed wiring instructions. Ensure all connections are secure and correctly polarized.
Video: Installation guide for the SMH II 4.2/7KW inverter, demonstrating wiring steps.
4.2.1. Battery Connection
Connect the positive and negative battery terminals to the inverter. Ensure correct voltage for your model:
- 2.2KW model supports 12VDC system.
- 3.2KW model supports 24VDC system.
Image: Diagrams for connecting 12VDC and 24VDC battery banks to the inverter.
4.2.2. PV Connection
Connect the positive and negative PV terminals from your solar array to the inverter. Pay close attention to voltage limits:
- Open circuit Voltage (Voc) of PV modules must not exceed the maximum PV array open circuit voltage of the inverter (e.g., 450VDC).
- Open circuit Voltage (Voc) of PV modules should be higher than the minimum battery voltage.
Image: PV connection diagram showing solar panels connected to the inverter and household loads. Includes example specifications for iSolar SMH II 4.2KW.
4.2.3. AC Input/Output and Grounding
Connect the AC input from your utility or generator and the AC output to your household loads. Ensure the inverter is properly grounded.
4.3. WIFI Installation (Optional)
For remote monitoring and control, an optional WIFI/GPRS data acquisition module can be installed. This module needs to be purchased separately.
Image: Diagram showing how to connect the optional WIFI module to the inverter for app monitoring.
Note: The SMH Inverter model is currently transitioning between two WIFI styles (external module vs. direct plug). Both function similarly, and shipping will be random.
5. Operation
5.1. Initial Startup
After all connections are made and verified, turn on the battery switch, then the inverter switch. The LCD display will power on and show system parameters. Once the lid is securely installed, the inverter can be used normally.
5.2. LCD Display and Navigation
Use the function keys (ESC, UP, DOWN, ENTER) to navigate through the LCD menus and configure various settings such as AC/Solar charger priority, output voltage range, and battery charging current. Refer to the 'Product Overview' section for key descriptions.
6. Specifications
| Parameter | ISolar-SMH-II-2.2KW | ISolar-SMH-II-3.2KW | ISolar-SMH-III-4.2KW | ISolar-SMH-III-6.2KW |
|---|---|---|---|---|
| General | ||||
| Rated Power | 2200VA/1800W | 3200VA/3000W | 4200VA/4200W | 6200VA/6200W |
| Input | ||||
| Voltage | 230Vac | |||
| Selectable Voltage Range | (170Vac~280Vac)±2%; (90Vac-280Vac)±2% | |||
| Frequency Range | 50Hz/60Hz (Auto detection) | |||
| Output | ||||
| AC Voltage Regulation (Batt.Mode) | 230VAC±5% | |||
| Surge power | 4400VA | 6400VA | 8400VA | 12400VA |
| Transfer Time | 10ms (for personal computers)/20ms (for home appliances) | |||
| Waveform | 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 | 31VDC | 61VDC |
| Maximum charge current | 60A | 60A | 80A | 80A |
| Solar Charger | ||||
| MAX.PV Array Power | 2000W | 3000W | 6200W | 6500W |
| MPPT Range Operating Voltage | 55-450VDC / 60-500V | |||
| Maximum PV Array Open Circuit Voltage | 450VDC | |||
| Maximum Charging Current | 80A | 80A | 120A | 120A |
| Maximum Efficiency | 98% | |||
| Physical | ||||
| Dimension D*W*H(mm) | 405x286x98mm | 405x286x98mm | 423x290x100mm | 423x310x120mm |
| Net Weight (kgs) | 4.5kg | 5.0kg | 9.5kg | 10.0kg |
| Communication Interface | RS232/RS485 (Standard) / GPRS/WIFI | |||
| Operating Environment | ||||
| Humidity | 5% to 95% Relative Humidity (Non-condensing) | |||
| Operating Temperature | 5°C to 55°C | |||
7. Troubleshooting (FAQ)
This section addresses common questions and issues you might encounter.
| Question | Answer |
|---|---|
| What is an off-grid inverter? | Off-grid inverter working mode: connects solar panels to supply power to the load; but cannot use the grid or battery to supply power to the load; when the energy is insufficient, it will automatically switch to the grid. |
| What is a Hybrid inverter? | Hybrid inverter working mode: Hybrid inverters are also called switched inverters. It not only stores energy in the battery to the grid company; PV panel + battery + grid. |
| What batteries can the inverter support? | Lithium battery, lead-acid battery, gel battery. |
| Lithium battery type? | LIFEPO4 and PYLON battery types are all lithium batteries. |
| What is the inverter battery voltage requirement? | 1KW inverter is equipped with 12V battery; 2KW-3KW inverter is equipped with 24V battery, which can connect batteries in series or parallel. |
| What types of solar panels can the inverter support? | Polycrystalline solar panel, monocrystalline solar panel. |
| Which inverter supports BMS battery communication function? | At present, only SMV 5KW and SMV III 3KW/5KW machines have BMS communication. SM 5KW and SM II 5KW models need external MODBUS BOX. |
| How many solar panels can be connected to the inverter? | Each inverter must first confirm the solar panel MPPT working voltage (parameter table on the product page). The input voltage of the solar panel that can be connected cannot exceed the maximum value. |
| Can the inverter work without a battery? | Off-grid inverter: SML II 3.5KW; SML II 5.5KW; SM II 5KW; SMV II 3.2KW; SML II 5KW; SMS III 3K; SMS III 5KW. Hybrid inverter: all models can work without battery. |
| Can inverters work in parallel? | If you need inverters that can work in parallel, please contact customer support. |
| Can the inverter be connected to the wind turbine? | Yes, but you can only connect the output of the wind turbine to the inverter. |
| Can the inverter be connected to the generator? | Can be connected to gasoline generators, diesel generators. The generator power cannot be less than 2 times the inverter. |
| How to connect solar panels? | According to the VMP voltage specification of the solar panel, the open circuit voltage does not exceed the maximum voltage. Solar panels can be connected in series above 200V. |
| What are the factors of solar panel output power? | 1. The output power of solar panels is mainly related to light intensity. If the light intensity is different, it will decrease in the morning and evening, and will be affected by clouds. 2. The shadow effect. When the solar panel is under light and is shaded or partially blocked, it will affect the output power. 3. Hot spot effect, mainly due to damage to the battery panel. |
| What is the no-load loss of the inverter? | The no-load loss of the inverter is about 1A. For example, 24V 1A. No-load loss is mainly reflected in: display screen, auxiliary power supply. |
| Can the generator start and stop automatically? | The inverter has the function of automatically starting and stopping. |
8. Maintenance
- Regularly inspect all connections for tightness and corrosion. Ensure all wiring is intact and free from damage.
- Keep the inverter's ventilation openings clear of dust and debris to ensure proper cooling and prevent overheating.
- Clean the exterior of the inverter with a dry, soft cloth. Do not use liquid cleaners, solvents, or abrasive materials.
- Ensure the ambient temperature remains within the specified operating range (5°C to 55°C) to prolong the life of the unit.
- Periodically check the LCD display for any error codes or warning messages and address them promptly.
9. Warranty and Support
This product comes with a standard manufacturer's warranty. For specific warranty terms, conditions, and duration, please refer to the documentation provided at the time of purchase or contact the seller directly.
For technical support, advanced troubleshooting beyond the scope of this manual, or to initiate a warranty claim, please contact the seller or authorized service center. Provide your product model number and purchase details for efficient assistance.
