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Huawei SDongleA-03 4G Smart Dongle Quick Guide
Product Overview
The Huawei SDongleA-03 Smart Dongle (referred to as the "Dongle") is a smart communications expansion module designed to facilitate wireless communication between Huawei inverters and management systems via a 4G network.
The Smart Dongle supports RS485 device cascading, allowing for inverter cascading or cascading with other devices. For SUN2000-2KTL/3KTL/4KTL/5KTL-L0 models, only one inverter can be connected. When multiple inverters are cascaded, only one Smart Dongle or one SmartLogger is permitted.
The information in this document is subject to change without notice. Every effort has been made to ensure accuracy, but statements, information, and recommendations do not constitute a warranty. This document can be downloaded by scanning the QR code.
Diagram: Master inverter connected via RS485 to slave inverters (optional), then to the Dongle, which connects via 4G to the Internet and a management system (FusionSolar app).
Number of devices in the RS485 communication scenario
Limited Number
Actual Number
Maximum number of devices that can be connected to the Dongle
10
Number of slave inverters
N≤9
Number of other devices (such as Smart Power Sensor and energy storage devices)
≤9-N
Inverters with different appearances are used in the same communication scenario. The inverters in this document are examples, and models are subject to change. In RS485 cascading, compatible slave inverter models include SUN2000-(3KTL-20KTL)-MO, SUN2000-50KTL/60KTL/65KTL-MO, SUN2000-29.9KTL/36KTL, or SUN2000-33KTL-A.
2. Installation and Commissioning
1. Install a SIM card
A standard SIM card (size: 25 mm x 15 mm; capacity: ≥ 64 KB) is required. For Huawei Hosting Cloud connection, prepare a SIM card based on traffic requirements. Remove the Dongle from the inverter before installing the SIM card.
Monthly Traffic Requirement of SIM Cards
Traffic Support
Inverters
10 MB + 4 MB x Number of inverters
Device performance data can be refreshed every 5 minutes.
With Smart PV Optimizers
2 MB + 0.2 MB x Number of Smart PV Optimizers
The Dongle logs, inverter logs, and IV diagnosis data can be exported monthly. The Dongle and inverters can be upgraded monthly.
With Smart Power Sensor
3 MB x Number of Smart Power Sensor
Installation Steps:
Install the SIM card in the arrow direction.
Ensure that the Dongle shell is properly installed.
2. Install the Dongle
Diagram: Dongle being inserted into the inverter USB port, with an indication of tightening torque (0.8-1.1 N·m).
LED Indicator Description
Color
Status
Remarks
Description
N/A
Off
Normal
The Dongle is not secured or is not powered on.
Yellow (blinking green and red simultaneously)
Steady on
Normal
The Dongle is secured and powered on.
Green
Blinking in a 2-second cycle (on for 0.1s and then off for 1.9s)
Normal
Dialing (duration < 1 min). If longer than 1 min, 4G parameter settings are incorrect. Reset parameters.
Blinking at long intervals (on for 1s and then off for 1s)
Abnormal
The dial-up connection is set up successfully (duration < 30s). If longer than 30s, management system parameters are incorrect. Reset parameters.
Red
Steady on
Normal
Successfully connected to the management system. The inverter is communicating with the management system through the Dongle.
Blinking at short intervals (on for 0.2s and then off for 0.2s)
Abnormal
The Dongle is faulty. Replace Dongle.
Steady on
Abnormal
The Dongle has no SIM card or the SIM card is in poor contact. Check installation or reinsert SIM card.
Blinking red and green alternatively
Blinking at short intervals (on for 0.2s and then off for 0.2s)
Abnormal
The Dongle fails to connect to the management system due to no signals, weak signal, or no traffic. Check SIM card signal via APP. If no signal or weak, contact carrier. Check SIM card tariff and traffic.
Blinking at long intervals (on for 1s and then off for 1s)
Abnormal
No communication with the inverter. Remove and reinsert Dongle. Check inverter-Dongle compatibility. Connect Dongle to other inverters. Check Dongle or inverter USB port for faults.
3. Install the FusionSolar App
Install the FusionSolar app (version 2.3.5 or later) and perform the Setup Wizard. If already performed, ignore this step. Download the app by searching "FusionSolar" in Google Play or scanning the provided QR code.
In Britain, only the FusionHome app (version 3.1.00.005 or later) can be used for commissioning. Download by searching "FusionHome" in Google Play or scanning the QR code.
Application Scenario: Commercial Smart Inverters
1. Communication Scenario
Diagram: Master inverter connected via RS485 to slave inverters (optional), then to the Dongle, which connects via 4G to the Internet and a management system (SUN2000 app).
Number of devices in the RS485 communication scenario
Limited Number
Actual Number
Maximum number of devices that can be connected to the Dongle
10
Number of slave inverters
N≤9
Number of other devices (such as power meters and energy storage devices)
≤9-N
Inverter models are subject to change. For detailed communication scenarios, refer to the "Distributed PV Plants Connecting to Huawei Hosting Cloud User Manual (Commercial Inverters + SDongleA + RS485 Networking Scenario)".
Flowchart: Install the Dongle → Set inverter parameters at the local router using the SUN2000 app (Optional) → Deploy plants in a remote management system using the FusionSolar app.
If the Dongle's SIM card has a PIN code, install the Dongle first. Otherwise, skip this step. Obtain the PIN code from the carrier. When connecting to Huawei FusionSolar management system, setting inverter parameters on the SUN2000 app is not required.
2.1 Installing the Dongle (Optional)
1. Install a SIM card
A standard SIM card (size: 25 mm x 15 mm; capacity: ≥ 64 KB) is required. For Huawei Hosting Cloud connection, prepare a SIM card based on traffic requirements. Remove the Dongle from the inverter before installing the SIM card.
Monthly Traffic Requirement of SIM Cards
Traffic Support
Inverters
10 MB + 4 MB x Number of inverters
Device performance data can be refreshed every 5 minutes.
With power meters
3 MB x Number of power meters
The Dongle logs, inverter logs, and IV diagnosis data can be exported monthly. The Dongle and inverters can be upgraded monthly.
With the weather station
3 MB x Number of weather stations
Installation Steps:
Install the SIM card in the arrow direction.
Ensure that the Dongle shell is properly installed.
2. Install the Dongle
Diagram: Dongle being inserted into the inverter USB port, with an indication of tightening torque (0.8-1.1 N·m).
When the LED indicator is green and blinks in a 2-second cycle (on for 0.1s and then off for 1.9s), remove the Dongle.
2.2 Setting Inverter Parameters at the Local Router Using the SUN2000 App
Before setting parameters, ensure the following conditions are met:
The SUN2000 App (version 3.2.00.001 for Android or later) is installed. Download by scanning the QR code or searching "SUN2000" in Google Play.
The AC or DC side of the inverter has been powered on.
The Bluetooth module, WLAN module, or USB data cable is connected to the inverter USB port to ensure communication with the SUN2000 app.
The following describes how to set the SUN2000 app (3.2.00.001) on the Android UI.
Diagrams showing connection options: Bluetooth/WLAN Connection and USB Connection to the inverter USB port, leading to the Android app interface.
Log in to the SUN2000 app as an Advanced User. Set basic parameters for the master inverter on the Quick settings screen, and synchronize some parameters of the master inverter to the slave inverters on the PV plant configuration screen.
When using WLAN connection, the initial WLAN hotspot name is "Adapter-WLAN module SN" and the initial password is "Changeme". Change the password immediately after first login and periodically for security. If the password is lost, devices cannot be accessed. If logging in for the first time or after factory defaults are restored, the Quick settings screen is displayed. Otherwise, set parameters under Grid Parameters, User Parameters, and Comm. Parameters on the Settings screen.
Screenshots showing the SUN2000 app interface: Quick settings, Grid Parameters, User Parameters, Comm. Parameters, and PV plant configuration with parameter synchronization options.
Management System and 4G/GPRS Parameters
Screenshots showing navigation within the app: Function Menu > Settings > Comm. Parameters > Management System / 4G/GPRS settings.
Item
Parameter
Description
Parameters for connecting to the management system
NMS server
Huawei management system: Retain the default value "intl.fusionsolar.huawei.com". Specifies the IP address or website of a third-party management system.
NMS server port
Huawei management system: Retain the default value "27250". Specifies the port number of connecting inverters to a third-party management system.
SSL encryption
Set to ☐ (default) when connected to Huawei management system. Set to ☑ when connected to a third-party management system. If unselected, data exchange is not encrypted, posing security risks.
SIM card APN parameters (4G/GPRS)
APN mode
Set parameters related to the SIM card, obtained from the SIM card carrier. When set to "Automatic" (default), APN, APN dialup number, APN user name, and APN user password are not displayed. When set to "Manual", APN related parameters are displayed and can be set.
Identification type
APN
APN dialup number
APN user name
APN user password
PIN
When connecting inverters to a third-party management system, ensure the system supports standard Modbus TCP protocol and configure the access point table based on Huawei inverter interface definitions. Set NMS server and NMS server port as required by the third-party system and replace the client certificate. Obtain inverter interface definitions from Huawei technical support. This document focuses on connecting inverters to a Huawei management system.
2.3 Installing the Dongle
Before installing the Dongle, remove any Bluetooth module or USB data cable. Each inverter has only one USB port. Local maintenance requires Dongle removal, interrupting communication. Communication automatically restores after Dongle reinstallation.
1. Install a SIM card
A standard SIM card (size: 25 mm x 15 mm; capacity: ≥ 64 KB) is required. For Huawei Hosting Cloud connection, prepare a SIM card based on traffic requirements. Remove the Dongle from the inverter before installing the SIM card.
Monthly Traffic Requirement of SIM Cards
Traffic Support
Inverters
10 MB + 4 MB x Number of inverters
Device performance data can be refreshed every 5 minutes.
With power meters
3 MB + 4 MB x Number of power meters
The Dongle logs, inverter logs, and IV diagnosis data can be exported monthly. The Dongle and inverters can be upgraded monthly.
With the weather station
3 MB + 4 MB x Number of weather stations
Installation Steps:
Install the SIM card in the arrow direction.
Ensure that the Dongle shell is properly installed.
2. Install the Dongle
Diagram: Dongle being inserted into the inverter USB port, with an indication of tightening torque (0.8-1.1 N·m).
LED Indicator Description
Color
Status
Remarks
Description
N/A
Off
Normal
The Dongle is not secured or is not powered on.
Yellow (blinking green and red simultaneously)
Steady on
Normal
The Dongle is secured and powered on.
Green
Blinking in a 2-second cycle (on for 0.1s and then off for 1.9s)
Normal
Dialing (duration < 1 min). If longer than 1 min, 4G/GPRS parameter settings are incorrect. Reset parameters.
Blinking at long intervals (on for 0.1s and then off for 0.1s)
Abnormal
The dial-up connection is set up successfully (duration < 30s). If longer than 30s, management system parameters are incorrect. Reset parameters.
Red
Steady on
Normal
Successfully connected to the management system. The inverter is communicating with the management system through the Dongle.
Blinking at short intervals (on for 0.2s and then off for 0.2s)
Abnormal
The Dongle is faulty. Replace Dongle.
Steady on
Abnormal
The Dongle has no SIM card or the SIM card is in poor contact. Check installation or reinsert SIM card.
Blinking red and green alternatively
Blinking at short intervals (on for 0.2s and then off for 0.2s)
Abnormal
The Dongle fails to connect to the management system due to no signals, weak signal, or no traffic. Check SIM card signal via APP. If no signal or weak, contact carrier. Check SIM card tariff and traffic.
Blinking at long intervals (on for 1s and then off for 1s)
Abnormal
No communication with the inverter. Remove and reinsert Dongle. Check inverter-Dongle compatibility. Connect Dongle to other inverters. Check Dongle or inverter USB port for faults.
2.4 Deploying Plants in a Remote Management System Using the FusionSolar App
Download and install the FusionSolar app (version 2.3.5 or later) from Google Play or by scanning the QR code. The following describes how to set the FusionSolar app (2.3.5) on the Android UI.
Register a management system account. If an account exists, skip this step.
Set export limitation parameters for the master inverter:
SUN2000-(3KTL-20KTL) as the master inverter: Log in to the FusionSolar app as installer, and choose Device maintenance > Energy control > Grid-tied point control > Active power to set related parameters.
A commercial smart inverter as the master inverter: Log in to the SUN2000 app as Advanced User, and choose Settings > Grid-tied Point Control > Active power control mode to set related parameters.
What Should I Do If Slave Inverters Cannot Be Connected In the Cascading Scenario Where a Commercial Smart Inverter Functions as the Master Inverter?
Ensure that the RS485 communications cable is securely connected to the slave inverters.
Log in to the SUN2000 app as Advanced User, choose Settings > Comm. Parameters > RS485, and ensure that the RS485 parameter of the slave inverters is set correctly.
Log in to the SUN2000 app as Advanced User, choose Settings > Comm. Parameters > Management System, and ensure that Cascading channel of the slave inverters is set to ☑ (selected).
EN Manual SmartDongle-4G Microsoft PowerPoint 2013 Adobe Illustrator(R) 15.0
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