Huawei SDongleA-05 V100R001C00SPC133 to V200 package

User question

I need to upgrade locally via fusion solar app, not fusion solar cloud, cause I have no installer account for the cloud

Artificial Intelligence Response

Direct answer to the question

Yes. You can upgrade a Huawei SUN2000 inverter / Smart Dongle locally with the FusionSolar app without using the FusionSolar cloud portal and without a cloud installer account. You must use Device Commissioning / Local Commissioning and log in to the device with the local installer account, not the cloud account.

Huawei’s own commissioning guidance shows that local access is done through FusionSolar app → Services → Device Commissioning, then connecting to the device WLAN; if the phone warns that the WLAN has no Internet, you must still choose to stay connected. (info.support.huawei.com)

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Detailed problem analysis

1. Important distinction: cloud installer account vs local installer login

You do not need a FusionSolar cloud installer account to perform a local firmware update.

There are two different “installer” concepts:

Account type	Where it is used	Needed for local firmware upgrade?
FusionSolar cloud installer account	FusionSolar portal / cloud plant management	No
Local installer login	Direct connection to inverter / dongle WLAN	Yes, normally

For the local method, the FusionSolar app connects directly to the inverter or Smart Dongle WLAN and opens the device local commissioning screen. Huawei documentation describes connecting locally to the Smart Dongle via the app, logging in as Installer, and then upgrading the device as prompted. It also notes that SDongleA-05 and SDongleB-06 support this local upgrade mode. (ske-solar.com)

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Practical local upgrade procedure

Assuming you are upgrading a Huawei SDongleA-05 or a SUN2000 system with Smart Dongle, use the following procedure.

Step 1 — Prepare the firmware package

Download the correct firmware package for your exact device model.

Examples:

• For SDongleA-05, use an SDongleA-05-compatible package.
• If you are moving from V100 to V200, the package is usually named similarly to:

SDongle_V200R022C10SPCxxx.zip

Important:

• Do not unzip the file.
• Keep it as a .zip package.
• Use only firmware intended for your exact device type.
• Do not use inverter firmware for the dongle or dongle firmware for the inverter.

On Android, save the .zip file in a normal folder such as Downloads.

On iPhone, download it into the Files app, then use Share → FusionSolar if FusionSolar does not see the file directly.

Huawei’s maintenance documentation states that the upgrade package should be prepared before upgrading the device. (ske-solar.com)

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Step 2 — Connect your phone locally to the inverter or dongle WLAN

1. Stand close to the inverter / dongle.
2. Enable Wi-Fi on your phone.
3. Preferably disable mobile data temporarily, or enable airplane mode and then re-enable Wi-Fi.
4. Open the phone Wi-Fi list.
5. Connect to the inverter or dongle WLAN.

Typical WLAN names may look like:

SUN2000-XXXXXXXX
SDongleA-XXXXXXXX

Huawei documentation notes that the WLAN name is usually based on the device name and serial number, and that the QR code on the device label can be used for first connection. (ske-solar.com)

If Android or iOS says:

This WLAN network has no Internet access. Connect anyway?

choose Connect / Stay connected. Otherwise, the app may fall back to mobile data and fail to enter local commissioning. Huawei explicitly warns that you must connect anyway when this message appears. (info.support.huawei.com)

For older devices, the default WLAN password is often:

Changeme

but newer devices may have the WLAN password printed on the device label. Huawei documentation notes that for some discontinued products the initial WLAN password was Changeme. (ske-solar.com)

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Step 3 — Enter Device Commissioning in FusionSolar

In the FusionSolar app, do not try to log in to the cloud installer portal.

Use one of these paths, depending on app version:

FusionSolar app → Services → Device Commissioning

or, on some login screens:

Three dots / More menu → Device Commissioning

Huawei’s FAQ gives the current path as FusionSolar app → Services → Device Commissioning, followed by connection to the device WLAN. (info.support.huawei.com)

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Step 4 — Log in as local Installer

When the local login screen appears, select:

User type: Installer

Then enter the local installer password.

Common possibilities:

00000a

or, on some newer products, a password that was set during first commissioning.

Huawei documentation states that on first login the password may need to be set as prompted, and that for some discontinued products the initial password is 00000a. (ske-solar.com)

If 00000a does not work, then the installer probably changed the local installer password. In that case:

• Check the handover documents from the installer.
• Ask the installer for the local installer password.
• Use Huawei’s official password reset procedure for your exact inverter model if you are the owner.
• Do not randomly power-cycle or reset equipment unless you have the correct Huawei reset procedure for your model.

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Step 5 — Start the local firmware upgrade

Once you are inside the local commissioning interface:

Maintenance → Device Update

or in some app versions:

Maintenance → Upgrade Device

Then:

1. Select the device to upgrade:
   • Smart Dongle for SDongleA-05 / SDongleB-06.
   • Inverter if you are upgrading the inverter firmware.
2. Choose:
   • Manual package selection, Import package, or similar.
3. Select the .zip firmware package.
4. Confirm the upgrade.
5. Wait until the process finishes.

Do not:

• Remove the dongle.
• Turn off AC or DC.
• Walk far away from the inverter with the phone.
• Close FusionSolar.
• Let the phone aggressively sleep or kill the app.

Huawei notes that sending an upgrade command to an inverter may interrupt grid connection and affect energy yield, so do it at a suitable time, preferably during low production or when temporary interruption is acceptable. (ske-solar.com)

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Current information and trends

Huawei’s current FusionSolar workflow increasingly separates:

• Cloud plant management, used by installers and owners for monitoring, binding, authorization, and remote updates.
• Local commissioning, used for direct device configuration, parameter setting, log export, and local maintenance.

The local path remains important because it allows service work even when:

• the cloud installer account is unavailable,
• the plant is not correctly bound,
• Internet access is down,
• the dongle is being recovered or reconfigured,
• the user only has physical access to the device.

Huawei’s 2025 FusionSolar connection manual still documents app-based local commissioning, Smart Dongle WLAN connection, local installer login, and local device upgrade for supported dongles. (ske-solar.com)

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Supporting explanations and details

If the Smart Dongle WLAN is not visible

This is normal in some installations.

Huawei documentation states that if the inverter itself has WLAN, the Smart Dongle WLAN can be disabled by default; if the inverter does not have WLAN, the Smart Dongle WLAN is enabled by default. (ske-solar.com)

Try these options:

1. Connect to the inverter WLAN instead of the dongle WLAN.
2. Scan the QR code on the inverter or dongle label.
3. Reboot the dongle and check whether its temporary WLAN appears.
4. If you have owner access to the plant, look for O&M Authorization / WLAN wakeup for the Smart Dongle. Huawei documentation describes enabling WLAN wakeup from the Smart Dongle card when the dongle WLAN is disabled. (ske-solar.com)

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If FusionSolar says no Internet

That is expected. You are connecting to a local device access point, not to your home router.

Select:

Connect anyway

or:

Keep Wi-Fi connection

If your phone keeps switching back to mobile data, disable mobile data temporarily.

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If the app does not see the firmware file

Check the following:

• The file is still a .zip.
• The file was not automatically unzipped by the phone.
• The package name matches the target device.
• On iPhone, import/share the file into FusionSolar.
• On Android, move the file to Downloads or another accessible folder.
• Use the latest FusionSolar app version.

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If the local installer password is unknown

You need the local device installer password, not the cloud password.

Try:

00000a

only if the device is still using the initial/default password or is an older/discontinued model. Huawei warns that passwords should be changed periodically and that if a password is lost, the device may not be accessible without recovery steps. (ske-solar.com)

If that fails, use the official Huawei reset method for your exact inverter model. Do not perform generic reset sequences from forums unless you are sure they match your hardware generation.

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Practical guidelines

Before starting, I recommend this checklist:

Item	Recommendation
Phone battery	At least 50%
Inverter status	Powered and stable
Firmware package	Correct model, still zipped
Wi-Fi	Connected to inverter/dongle WLAN
Mobile data	Disabled temporarily
Login	Local Installer, not cloud login
Timing	Avoid peak production or unstable weather
Backup	Record current firmware versions and important settings

After the upgrade:

1. Reconnect locally.
2. Check the firmware version.
3. Confirm the dongle is online.
4. Check communication settings.
5. If you use Home Assistant, EVCC, Solaranzeige, or another Modbus TCP system, verify Modbus settings again because firmware upgrades can change or reset communication behavior.

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Brief summary

You can do the upgrade locally:

FusionSolar app → Services / More → Device Commissioning
→ connect to inverter/dongle WLAN
→ log in as local Installer
→ Maintenance → Device Update
→ select firmware .zip package
→ upgrade Smart Dongle / inverter

You do not need a FusionSolar cloud installer account. You only need the local installer password for the device and the correct firmware package.