SDongleB-06 Smart Dongle Quick Guide (4G)

SDongleB-06 Smart Dongle Quick Guide (4G)


Document Issue: 03
Part Number: 31500HKH
Date: 2025-07-25
Copyright © Huawei Digital Power Technologies Co., Ltd. 2025. All rights reserved.


The information in this document is subject to change without notice. Every effort has been
made in the preparation of this document to ensure accuracy of the contents, but all statements,
information, and recommendations in this document do not constitute a warranty of any kind,
express or implied.

• SDongleB-06 Smart Dongle (also referred to as the Dongle) is a smart communications
expansion module that works with Huawei inverters to implement wireless communication
between inverters and the management system through the 4G network.
• If multiple inverters are cascaded, use either a Dongle or a SmartLogger for networking. You
cannot use two networking methods at the same time.
1 Communication Scenario
RS485 Communication
Slave Slave
inverter n inverter 1 Master inverter App

Management
system


Devices in the dashed box are Dongle Base station
optional.

• In the networking, the inverter where the Dongle is installed is the master
inverter, and other inverters are slave inverters. Slave inverters can
communicate with the Dongle through cascading.
• This document uses connection to Huawei FusionSolar Smart PV
Management System as an example. For details about connection to a
third-party management system, see the user manual.
• For details about Dongle performance parameters and supported inverter
User Manual
models, see the user manual.

Number of Devices Required for Networking

Limit Actual Number
Maximum Number of Devices That Number of Slave Number of Non-Inverter Devices
Can Be Connected to the Dongle Inverters (Such as Power Meters)
10 n ≤ 9 ≤ 9 – n
10 3 (with energy storage systems) n ≤ 2 ≤ 2 – n
3 (with single-phase inverters) n ≤ 2 ≤ 2 – n
2 2 n ≤ 1 ≤ 1 – n

• The number of devices that can be cascaded varies with the Dongle model. You can view
the maximum number of devices that can be connected to the Dongle from the label on
the external package.
• If devices are connected to the RS485-2, RS485_2, or 485B2 and 485A2 ports of the master
inverter, the devices are not included as cascaded devices.
2 Installation and Commissioning
1. Install a SIM card.

• You need to prepare a standard SIM card (size: 25 mm x 15 mm; capacity: ≥ 64 KB).
When connecting to Huawei FusionSolar Smart PV Management System, prepare a SIM
card based on the data requirements in the following table.
• Before installing a SIM card, you need to remove the Dongle from an inverter.

Recommended Monthly Requirement Plan for the SIM Card Data Capability
Without a power
meter or energy 15 MB + 4 MB x Number of inverters
storage system • Device performance
With a power data can be updated
15 MB + 7 MB x Number of inverters
meter every 5 minutes.
•
Inverters The Dongle logs,
With energy 18 MB + 7 MB x Number of inverters + inverter logs, and I-V
storage system 5 MB x Number of DC-DC converters diagnosis data can be
exported once a month.
With a power meter
18 MB + 7 MB x Number of inverters + The Dongle and
and energy storage
5 MB x Number of DC-DC converters inverters can be
system upgraded once a month.
Inverter data usage + 2 MB + 0.2 MB x
With optimizers
Number of Smart PV Optimizers

• If the inverter is connected to both the poverty alleviation monitoring center and the
FusionSolar Smart PV Management System, the recommended monthly data plan of the
SIM card is 14 MB + 19 MB x Number of inverters.
• In China, a SIM card with a maximum data plan of 100 MB is provided. If the calculated
data exceeds the maximum, you are advised to purchase a SIM card by yourself.
• The following are examples of recommended monthly data plans for a SIM card to be
used with the FusionSolar Smart PV Management System:
• If two inverters and a power meter are installed, the recommended monthly data
plan is 15 MB + 7 MB x 2 = 29 MB.
• If one inverter and two energy storage systems are installed, the recommended
monthly data plan is 18 MB + 7 MB x 1 + 5 MB x 2 = 35 MB.
• If one inverter, two two energy storage systems, and 10 optimizers are installed, the
recommended monthly data plan is 35 MB + 2 MB + 0.2 MB x 10 = 39 MB.


2. Install the Dongle.


Ensure that the AC and DC sides of the inverter are powered on before setting parameters.

3. Install the FusionSolar app. Perform the Setup wizard operations. If you have performed
such operations, skip this step. If not, you can scan the QR code below to obtain the app
quick guide which describes the Setup wizard operations.

• You can obtain SIM card parameters from
the SIM card carrier. For more details
about how to use the app, scan the QR
code to obtain related documents.
• To create multiple installer accounts for a
company, log in to the app and then tap
Add user. FusionSolar App Quick Guide

LED
Remarks Description
Color Status

- Off The Dongle is not secured or not powered on.
Normal
Yellow Steady on The Dongle is secured and powered on.
Normal Dialing (lasts for less than 1 minute)
The blinking
interval is 2s. The
indicator is on If the duration is longer than 1 minute, the 4G
for 0.1s and then Abnormal parameter settings are incorrect. Re-configure the
off for 1.9s. parameters.

Normal The dialup is successful (lasts for less than 30s).
Blinking slowly
If the duration is longer than 30s, the management
Green (on for 1s and
then off for 1s) Abnormal system parameters are incorrectly set. Re-configure
the parameters.

Steady on The management system is successfully connected.

Blinking fast (on Normal
The inverter is communicating with the
for 0.2s and then
management system through the Dongle.
off for 0.2s)

Steady on The Dongle is faulty. Replace the Dongle.
The Dongle has no SIM card or the SIM card is in
Blinking fast (on
poor contact. Check whether the SIM card has been
for 0.2s and then
installed or is in good contact. If not, install a SIM
off for 0.2s)
card or remove and re-insert the SIM card.

The Dongle fails to be connected to a management
Red system because the SIM card has poor or no
reception, or has run out of mobile data. If the
Blinking slowly Dongle is reliably connected, check the SIM card
(on for 1s and connectivity through the app. If you have poor or no
then off for 1s) Abnormal reception, contact the carrier. Check whether the
tariff and mobile data plan of the SIM card are
adequate. If not, ensure sufficient balance in the
SIM card or purchase a data package.

No communication with the inverter
• Remove and then insert the Dongle.
Blinking slowly
• Check whether the inverter matches the Dongle.
(red for 1s and
• Connect the Dongle to another inverter. Check
Blinking green for 1s)
red and whether the Dongle or the USB port of the
green inverter is faulty.
alternately
Blinking fast (red
for 0.2s and then Normal The Dongle is being upgraded locally.
green for 0.2s)

4. Commission the inverter locally via the Smart Dongle WLAN. If the Smart Dongle WLAN is
disabled, log in to the FusionSolar app and tap the plant name on the Home screen to
access the plant screen. Tap Devices and then tap SDongleB-06. Choose O&M
Authorization > WLAN wakeup > Confirm to enable the Smart Dongle WLAN.

If the inverter has a built-in WLAN module, the Smart Dongle WLAN is disabled by default. If
the inverter does not have a WLAN module, the Smart Dongle WLAN is enabled by default.


4 Obtaining Documentation

You can obtain the latest version of this document by scanning the following QR codes.


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