1. Introduction
This document provides instructions for the POWLAND Hybrid Solar Inverter, a multi-function inverter/charger that combines the capabilities of an inverter, an MPPT solar charger, and a battery charger. It is designed to offer uninterruptible power support in a portable size. The comprehensive LCD display allows for user-configurable and easily accessible button operations, such as adjusting battery charging current, AC/Solar charger priority, battery charging/cut-off voltage, and acceptable input voltage based on different applications.
Video: Unboxing and initial overview of the POWLAND Hybrid Solar Inverter.
2. Product Features
- Lithium battery activation function via PV or Utility.
- Compatible with LiFePO4 batteries via RS485 communication.
- Pure sine wave output.
- Power factor of 1.0.
- PV input voltage range: 60Vdc-500Vdc.
- Built-in MPPT 100A solar charger.
- Capable of working without a battery.
- Detachable dust cover for harsh environments.
- Optional Wi-Fi remote monitoring.
- Supports multiple output priorities: UTL (Utility), SOL (Solar), SBU (Solar-Battery-Utility), SUB (Solar-Utility-Battery).
- EQ function to optimize battery performance and extend lifecycle.
Image: Overview of the inverter's comprehensive protection features.
3. Specifications
| Category | Parameter | Value |
|---|---|---|
| Model | Model Number | ISolar-SMG-II-4KW-24V WiFi |
| Capacity | Rated Power | 3.5KVA / 3.5KW |
| Parallel Capability | Parallel Operation | No |
| Battery | Lithium Battery Activation | Yes (by PV or Utility) |
| Lithium Battery Communication | Yes (RS485) | |
| Input (AC) | Nominal Voltage | 230VAC |
| Acceptable Voltage Range | 170-280VAC (Personal Computer); 90-280VAC (Home Appliances) | |
| Frequency | 50/60 Hz (Auto sensing) | |
| Output (AC) | Nominal Voltage | 220/230VAC ±5% |
| Surge Power | 7000VA | |
| Frequency | 50/60Hz | |
| Waveform | Pure Sine Wave | |
| Transfer Time | 10ms (Personal Computer); 20ms (Home Appliances) | |
| Peak Efficiency (PV to INV) | 96% | |
| Peak Efficiency (Battery to INV) | 93% | |
| Protection | Overload Protection | 5s @ >= 140% load; 10s @ 110%-140% load |
| Admissible Power Factor | 0.6~1 (inductive or capacitive) | |
| Battery Charger | Battery Voltage | 24VDC |
| Floating Charge Voltage | 27VDC | |
| Overcharge Protection | 33VDC | |
| Charging Method | CC/CV | |
| Solar Charger | Solar Charger Type | MPPT |
| Max. PV Array Power | 4000W | |
| Max. PV Array Open Circuit Voltage | 500VDC | |
| PV Array MPPT Voltage Range | 60VDC ~ 500VDC | |
| Max. Solar Input Current | 15A | |
| Max. Solar Charge Current | 100A | |
| AC Charger | Max. AC Charge Current | 80A |
| Max. Charge Current (PV+AC) | 100A | |
| Physical | Dimensions (D x W x H) | 358 x 295 x 100 mm |
| Package Dimensions (D x W x H) | 465 x 380 x 175 mm | |
| Net Weight | 7 Kg | |
| Communication Interface | RS232 + RS485 | |
| Environment | Operating Temperature Range | -10°C to 50°C |
| Storage Temperature | -15°C ~ 50°C | |
| Humidity | 5% to 95% Relative Humidity (Non-condensing) |
4. Product Overview
4.1. Front Panel: LCD Display, Function Keys, and LED Indicators
Image: Front panel overview with LCD, function keys, and LED indicators.
| LED Indicator | State | Message |
|---|---|---|
| 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 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 |
4.2. Rear Panel Connections
Image: Rear panel connections and their labels.
- Wire outlet hole (RS232/RS485 communication port)
- Power on/off switch
- Grounding
- AC input
- AC output
- PV input
- Battery input
5. Setup and Installation
5.1. 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.
- Install this inverter at eye level to allow the LCD display to be read at all times.
- 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 right diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.
Image: Mounting guidelines for the inverter, showing required clearances.
CAUTION: SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
5.2. Battery Connection
Connect all battery packs as shown in the diagram below. The 4KW model supports a 24VDC system.
Image: Battery connection diagram for a 24V system.
Image: Inverter compatibility with various battery types.
5.3. Solar Photovoltaic Panel Wiring Method
When selecting proper PV modules, ensure the following parameters are considered:
- Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter.
- Open circuit Voltage (Voc) of PV modules should be higher than the min. battery voltage.
Image: Solar PV panel wiring methods (series and parallel).
5.4. System Diagram
The following diagram illustrates the typical operation of the inverter with a battery connected, showing connections for solar power, generator/utility, external battery packs, and home appliances.
Image: System diagram for inverter operation with battery connected.
6. Operating Instructions
The inverter's operation is managed through the LCD display and function keys on the front panel. Users can configure various settings to optimize performance based on their specific needs.
6.1. LCD Display and Navigation
The LCD display provides real-time information on PV input, AC input, battery level, output load, and system status. Use the function keys (ESC, UP, DOWN, ENTER) to navigate through menus and adjust settings. Refer to the 'Product Overview' section for a detailed explanation of each indicator and key function.
Image: Detailed LCD display and indicator symbols.
6.2. Wi-Fi Monitoring
The inverter supports Wi-Fi monitoring, allowing users to remotely monitor system performance via a mobile application (SmartESS for iOS and Android). This feature provides convenient access to real-time data and system status from anywhere.
Image: Wi-Fi monitoring setup and app download information.
6.3. Appliance Compatibility
The inverter is designed to be compatible with a wide range of household appliances, providing reliable power for various needs.
Image: Inverter compatibility with various daily appliances.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your POWLAND Hybrid Solar Inverter.
- Cleaning: Periodically clean the exterior of the inverter, especially the ventilation openings, to prevent dust accumulation that could hinder heat dissipation. Use a dry, soft cloth. Ensure the unit is powered off before cleaning.
- Connection Checks: Regularly inspect all electrical connections (PV input, AC input/output, battery input) to ensure they are secure and free from corrosion. Loose connections can lead to overheating or inefficient operation.
- Battery Health: If using external batteries, monitor their health and ensure they are within their recommended operating parameters. The inverter's EQ function helps optimize battery performance.
- Environmental Conditions: Ensure the installation environment remains within the specified operating temperature and humidity ranges. Avoid exposing the inverter to direct sunlight, moisture, or corrosive substances.
- Firmware Updates: Check the manufacturer's website or the SmartESS app for any available firmware updates to ensure your inverter has the latest features and bug fixes.
8. Troubleshooting
This section provides guidance on common issues you might encounter with your inverter. Always ensure safety precautions are followed before attempting any troubleshooting steps.
8.1. LED Indicator Messages
Refer to the 'LED Indicator' table in the 'Product Overview' section for specific messages related to the AC/INV, CHG, and FAULT LEDs. These indicators provide crucial information about the inverter's operational status and any detected issues.
8.2. Common Issues and Solutions
- No Power Output:
- Check if the inverter is turned on.
- Verify AC input and battery connections are secure.
- Check for any FAULT LED indications and consult the LED table.
- Ensure the battery voltage is within the operational range (24VDC nominal).
- Low Output Voltage:
- Confirm the output voltage setting on the LCD display. The nominal output voltage is 220/230VAC ±5%.
- Check the battery charge level; low battery can affect output.
- Ensure the load is not exceeding the inverter's capacity (3.5KW).
- Inverter Overheating:
- Ensure adequate ventilation around the unit as per mounting instructions.
- Clean any dust from the ventilation openings.
- Reduce the connected load if it's consistently high.
- Solar Panels Not Charging:
- Verify PV input connections and ensure solar panels are receiving sufficient sunlight.
- Check PV array voltage and current on the LCD display to ensure they are within specifications (60VDC-500VDC MPPT range).
- Confirm the solar charger type is MPPT and functioning.
9. User Tips
- Digital Manual: If you prefer a digital copy of this manual or need further detailed information, please contact POWLAND customer support.
- Wi-Fi Monitoring: Utilize the Wi-Fi monitoring feature with the SmartESS app for convenient remote management and real-time status updates of your inverter.
- Battery Compatibility: The inverter supports various battery types, including LiFePO4 with RS485 communication. Ensure your battery type is correctly configured in the inverter settings for optimal performance and longevity.
10. Warranty and Support
The POWLAND Hybrid Solar Inverter comes with a 1-year warranty from the date of purchase. For any technical assistance, warranty claims, or further inquiries, please contact POWLAND customer support through the seller's official channels.