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Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar

Bob271 430422 1369
Best answers

How do I get a Huawei SUN2000 Wi‑Fi dongle online when FusionSolar shows the SDongleA as offline?

To get the dongle/configuration working, connect to the inverter’s own Wi‑Fi AP, open FusionSolar, choose “Putting the device into operation,” scan the QR code on the inverter and enter the password from the label (or the default 00000a if it was not changed) [#18928339][#19344455] If Wi‑Fi setup keeps failing, one user gave up on wireless and connected the dongle/router by Ethernet cable directly, which worked immediately [#18870485] Another user reported that installing the latest FusionSolar fixed a case where the dongle was detected but all networks looked open and no connection would complete [#19386137] During commissioning and software updates, the inverter should have DC power available; without DC, Huawei units may behave oddly and not finish configuration/update properly [#18871886]
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  • #901 20226680
    luozewen1111
    Level 2  
    StartUp on Grid recov Enable
    on-grid recon time 60
    voltage upper 253,0
    voltage lower 195,5
    freq upper 50,10
    freq lower 47,50

    Protection

    Ins 0,037
    volt pro threshold 50,0
    phase angle offset Disable
    10 min OV V 253,0
    10 min OV time 100
    Level 1 OV V 287,5
    Level 1 OV time 100
    Level 2 OV V 297
    Level 2 OV time 90
    Level 1 UV V 184,0
    Level 1 UV time 3000
    Level 2 UV V 104,5
    Level 2 UV time 300
    Level 1 OF Hz 51,50
    Level 1 OF time 100
    Level 1 UF Hz 47,5
    Level 1 UF time 100


    Feature

    LVRT Enable
    LVRT trigger V 184,0
    LVRT k fac 2,0
    HVRT Enable
    HVRT trigger V 264,5
    HVRT k fac 2,0
    Grid vol prot shield VRT Enable

    Power Adjust

    Overfrequency derating Enable
    Trigger 50,2
    Exit 50,15
    cutoff 51,5
    cutoff power % 48



    Das Obige ist die Einrichtung der chinesischen Version von Huawei-Wechselrichtern in Deutschland. alle bitte can'kao
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  • #902 20228264
    jurijknutsson3
    Level 1  
    Hi, do some one knows what error 2064 id12 means?
  • #903 20229283
    gitpusher
    Level 12  
    jurijknutsson3 wrote:
    Hi, does anyone know what error 2064 id12 means?

    I think 2064 stands for "Major device fault" but I don't know what ID12 is.
  • #904 20229305
    strucel
    Level 36  
    luozewen1111 wrote:
    Just because the Chinese version of Huawei's inverter requires more settings doesn't mean it can't be used. The only problem is the warranty. Tech veterans can know more.


    For some time now, an inverter from the Chinese market cannot be joined to the Polish fusion solar account - it probably is the case all over Europe, the owners of such an inverter are left with either an application in Chinese after logging in to the inverter's wifi locally (not via a dongle) as an app installer or communication after modbus and 3party software.
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  • #905 20229928
    kravat3
    Level 10  
    strucel wrote:
    luozewen1111 wrote:
    Just because the Chinese version of Huawei's inverter requires more settings doesn't mean it can't be used. The only problem is the warranty. Tech veterans can know more.


    For some time now, an inverter from the Chinese market cannot be joined to the Polish fusion solar account - it probably is the case all over Europe, the owners of such an inverter are left with either an application in Chinese after logging in to the inverter's wifi locally (not via a dongle) as an app installer or communication after modbus and 3rd party software.


    And you know from when? It so happens that I have a "Chinese" and a problem with logging in.
  • #906 20230091
    strucel
    Level 36  
    Unfortunately, I do not know, two years ago it was possible without any problems because I assumed it myself and last year it was impossible to do it last year.
    Fortunately, the old accounts are working and the only sign that something is wrong is such an annotation in fusion solar
    Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar

    2 years ago, the purchase of this inverter from the Chinese was a good deal for the economical - there was no guarantee (well, some virtual seller), but it cost half the price of the Polish distribution, which at the rate of faults that huawei boasted around 1%, as far as I remember, minimized the risk of a meltdown Of course, the VAT invoice was "my current" fit.
    Going back to the merits, we tried a false geolocation and none of this - it turned out that the Chinese have their version of fusion solar, completely independent from the rest of the world and to set up an account there you need to have an active Chinese phone number, just like in the case of baidu. You need someone in China to do us a favor and it probably would have to be a permanent one, not a one-off, and the application would probably be in Chinese anyway.
  • #907 20230855
    dprzyb
    Level 22  
    Since the invoice was, you have a two-year warranty as if what.
  • #908 20230859
    gitpusher
    Level 12  
    strucel wrote:
    Of course, the VAT invoice was suitable for "my current".

    Out of curiosity: how did you handle the VAT invoice for equipment purchased, for example, on AliExpress. Where did you get it?
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  • #909 20230873
    strucel
    Level 36  
    The equipment was bought in Poland from a legally operating store, the so-called individual import outside the official Huawei channel (the importer bought himself in China or on an alibaba, for example, a container of inverters and brought them to Europe, it is not legally prohibited), the seller did not boast about the distribution channel, but the fact that gave 2 years gw. instead of 5 it gave food for thought and after checking the serial numbers it came out what and how, I still say that then it was worthwhile because instead of 11 thousand for the inverter I paid about 5 thousand.
    Two years passed in September, so the seller's warranty expired (I don't even know if the company still exists), the inverter has so far passed 25MWh without failure, I hope it will work a little more :)
  • #910 20230944
    szczukot
    Level 14  
    One "but": inverters have a 10-year (not 5) warranty with us.
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  • #912 20231127
    rokbok
    Level 39  
    strucel wrote:
    Two years ago, the m0 series (because another one was not on sale) was 5 years old in Poland with the possibility of a paid extension.


    You are wrong, I have had the M0 series for over two years and the warranty from the start is 10 years without any paid extensions.
  • #914 20231180
    rokbok
    Level 39  
    Well, different guarantees for different inverters.

    Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar
  • #917 20231583
    strucel
    Level 36  
    No copy / paste, only the situation from 2 years ago with the hook, as it is now, it has little to do with what it was then, so you can brag about who has a longer one, but it has little to do with the merits. You have a 10-year warranty which you probably will not use because there will be no need and I was only two years old during which I had no breakdowns and for the money I saved I bought over 3kWp more in panels.

    And I'm not sorry, I have guarantees until 2025 implemented in China as if. Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar
  • #918 20243552
    szczukot
    Level 14  
    strucel wrote:


    And I'm not sorry, I have guarantees until 2025 implemented in China as if. Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar


    I told you - no matter some copy / paste made of paper. It is important what the system will say about the hardware.
    Another thing is that you are unlikely to do it with us.
  • #920 20266904
    bierutek
    Level 12  
    Robyn212 wrote:
    Pojawiła się nowa wersja oprogramowania dla falownika
    https://support.huawei.com/enterprise/en/fusi...01|9452479|21439560|7921563|21102413|22755755

    Zmiany w nowej wersji SUN2000MA V100R001C00SPC147

    New Features:
    1. Added Czech grid code CZECH-EN50549-LV230.
    2. Added the function of upgrading the optimizer of the G4 chip type and
    exporting logs.
    3. Added the function of grounding abnormal shutdown. When the function is
    disabled, the inverter can be connected to the grid and run normally in the
    case of a short circuit to the ground.
    4. Added support for Keno Backup.
    5. Supports search, upgrade, link disconnection detection, and long-string
    voltage adjustment of the MERC-1100W-P/MERC-1300W-P optimizer.

    Modified Features:
    1. Upgrade the SWITZERLAND-NA/EEA:2020-LV230 power grid code
    configuration according to Switzerland 2020 new standard.

    Optimized Features:
    1. Improved AFCI adaptability in scenarios with high background noise.
  • #921 20268911
    Robyn212
    Level 16  
    I have a question for people who have optimizers. Do you also have the option to update optics in the application in the maintenance and device update tab?
    Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar
  • #922 20269946
    qrko
    Level 14  
    Does anyone have an inverter in the HC version supporting the current up to 13.5A? I wonder how much more I would take, because by accident I noticed that in the high season the amperage cuts me to 11.2A with 450W panels.

    Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar
  • #923 20270040
    jsw
    Level 15  
    I have it for a month and it does not cut to 11.2A as the previous one. In the chain with the 450W-P optimizers the most was 12.78A.
  • #924 20270534
    Robyn212
    Level 16  
    Could someone throw the latest version of software 147 on old 132?
  • #925 20270700
    lizak1983
    Level 15  
    @ robyn212
    Firmware 147 and information about this update
    SUN2000MA ...uments.zip (3.96 MB)You must be logged in to download this attachment.
    SUN2000MAV...ackage.zip (3.4 MB)You must be logged in to download this attachment.
  • #926 20276181
    Robyn212
    Level 16  
    There is a new version of the FusionSolar and SUN2000 applications. The inverter temperature and insulation resistance were reported. The layout of the optimizers of blue saturation levels shows the production volume of the panel. But there is also one error, if we have a horizontal panel drawn in the physical system, bushes appear and the production volume is not visible.
  • #927 20276344
    rutekjery
    Level 7  
    Colleagues, maybe someone can find new soft for SDongla V100R001C00SPC133 and could provide a link?

    In the requirements for the new V100R001C00SPC147 inverter software, the above soft SDongla is compatible, so it's probably better to update SDongla first (I currently have V100R001C00SPC127) and then update the soft on the inverter.
  • #928 20276779
    qrko
    Level 14  
    How much resistance do you have measured in the new app? For me, it shows 3M?.
  • #929 20276859
    Robyn212
    Level 16  
    qrko wrote:
    How much resistance do you have measured in the new app? For me, it shows 3M?.

    For me the same
  • #930 20277056
    Jacejek
    Level 14  
    "Colleagues, maybe someone can find new soft for SDongla V100R001C00SPC133 and could add a link?"

    And it's strange because for me the newest available in FusionSolar is SPC130 (I am just after the update and there is nothing newer) and I have an update available for the inverter to SPC147 ..
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Topic summary

✨ The discussion centers on issues and configurations related to Huawei SUN2000 series inverters, particularly focusing on WiFi dongle connectivity, firmware updates, and the FusionSolar platform. Users report successful inverter commissioning and firmware updates but face persistent problems connecting the WiFi dongle, which often blinks red and appears offline in FusionSolar. A reliable workaround is connecting the dongle via Ethernet cable to the router. Changing WiFi network credentials requires logging directly into the inverter through FusionSolar or FusionHome apps, as remote password changes are not supported. Installer accounts have broader configuration permissions than owner accounts, which often restrict access to settings such as location, currency, and power configuration. The discussion also covers optimal network code selection (e.g., Germany-VDE-AR-N-4105 for Poland), MPPT multi-peak scanning settings for shadowed panels, and string capacity configuration aligning with physical panel connections. Users note that inverter startup voltage and MPPT voltage ranges affect minimum panel string length, with debates on using 140V or 240V for calculations. Firmware updates are available but may not always be visible to all users simultaneously; some recommend downgrading FusionSolar app versions to resolve login or configuration issues. The FusionSolar platform's interface and permissions can be non-intuitive, with some users unable to modify installation parameters without installer access. Additional topics include inverter automatic shutdown due to high grid voltage, anti-PID function requiring external devices, and integration with Huawei DTSU666-H smart meters, which are often auto-detected. Overall, the thread provides practical advice on inverter setup, network configuration, firmware management, and troubleshooting communication issues with Huawei SUN2000 inverters and associated software tools.

FAQ

TL;DR: A 10-min average grid voltage ≥ 253 V forces the SUN2000 inverter to disconnect [Elektroda, lizak1983, post #19657944] “Huawei is a good inverter, I would not be afraid to install it” [Elektroda, Rhaavir, post #18871886] Latest firmware SPC136 fixes battery and startup issues.

Why it matters: Correct settings stop nuisance shutdowns, improve yield and keep the warranty intact.

Quick Facts

• Default grid code for PL installers: Germany VDE-AR-N-4105 or Custom 50 Hz with 253 V/10-min limit [Elektroda, domelek, post #19529531] • SUN2000-M0/M1: MPPT range 200–850 V; Startup 200 V; Max string current 11 A (oper.), 15 A (Isc) [Huawei Datasheet]. • Firmware: SPC136 (inverter) & SPC118 (SDongleA-05) – update in daylight, 20 min per device [Elektroda, lizak1983, post #19640000] • Wi-Fi dongle LED codes: steady green = online; red blink = no router link [Elektroda, JackRze, post #19489029] • Warranty checker: https://support.huawei.com – serial + e-mail required [Elektroda, maneks, post #19359819]

How do I change the inverter’s Wi-Fi after replacing a router?

  1. On the router set the new SSID and password identical to the old ones – the inverter reconnects automatically [Elektroda, lizak1983, post #19657944]
  2. If you prefer to edit the inverter, open the SUN2000 app, connect to the inverter’s AP, choose Maintenance > Communication > Router Wi-Fi and enter the new credentials; save and wait for the LED to turn steady green.

What causes the SUN2000 to trip on sunny days?

A 10-minute average grid voltage at the terminals above 253 V triggers disconnection per VDE-AR-N-4105 [Elektroda, lizak1983, post #19657944] High roof-top cable resistance adds 1-2 V, so measure at the inverter. Load shifting (e.g., 2 kW boiler) or DSO tap change fixes the issue.

Can I lift the 253 V reconnection limit?

Raising “Upper voltage limit when reconnecting to grid” breaches EU NC RfG and risks neighbour equipment damage. Installers and DSOs can audit logs [Elektroda, rokbok, post #19639893] Keep 253 V unless your DSO grants a written exception.

Firmware: what’s new in SPC136 and how do I install it?

SPC136 adds battery-version alarm, M1–M3 parallel support and faster offline self-check [Huawei ReleaseNotes 2021]. Download via SUN2000 or FusionSolar app (Me > Device Commissioning > Update). Stay within inverter Wi-Fi, tap Update, wait ~20 min; the inverter reboots once at ~80 % [Elektroda, MisiekDPx, post #19639882]

How do I update the SDongleA-05 Wi-Fi dongle?

Unplug the dongle, re-insert: it broadcasts “Dongle–AP”. Connect with SUN2000 app, default pwd 00000a, go to Maintenance > Update Device, choose SPC118 file and start. LED blinks fast green during upgrade, steady green when done (≈10 min) [Elektroda, lizak1983, post #19640000]

Grid code list shows only three Chinese entries – what now?

Import units lack EU presets. Select Custom 50 Hz and manually enter: U/Un 0.85 = 0 s, 1.10 = 10 min, 1.15 = 0.1 s; cos φ = 0.9 lead/lag; Q/U droop 4 % [Elektroda, domelek, post #19529531] A valid NC RfG declaration is still required for DSO acceptance.

My Wi-Fi dongle flashes red every few days – fix?

LED red blink means router unreachable. Common causes: weak signal or changed password. Move a repeater within 5 m (-55 dBm or better) [Elektroda, JackRze, post #19489219] If stable signal still fails, reboot the dongle or update its firmware (see above).

Installer owns the FusionSolar site – can I get control?

Yes. Ask the installer to delete the plant from their account, then register a new Installer account with your e-mail and inverter serial; Huawei cloud blocks duplicate serials [Elektroda, rokbok, post #19636492] Warranty remains tied to the serial, not the account.

Lost inverter password – how to reset?

Connect SUN2000 app to the inverter AP, choose “Reset Password”. You must input the 6-digit ESN from the side sticker and the current date. The default admin password resets to 00000a [Huawei Manual].

What’s the correct string current for SUN2000-M1?

Design strings so Isc ≤ 15 A and operating current ≤ 11 A. Example: 12×340 W modules give Isc 10.3 A, within limits [Elektroda, mariusz.lubicz, post #19656018] Exceeding Isc risks optimizer derating and warranty issues.

Will Huawei optimizers shut a whole string when one panel is shaded?

No. Each SUN2000-450W-P acts as a DC/DC converter. A shaded panel continues at lower power while the rest maintain maximum current [Elektroda, jsw, post #19656269] The inverter therefore keeps production and avoids hot-spot bypass.

How do I clear old alarms in FusionSolar?

Go to Device > Alarms, tap the three-dot menu, choose “Clear”. Alarms caused by firmware mismatch disappear automatically after updating both inverter and dongle [Elektroda, stratus84, post #19490242]

Edge case: inverter shows 2 V DC after switch-on – diagnosis?

Reverse-polarity MC4 crimps drop the PV voltage to ≈ 2 V and block startup [Elektroda, kravat3, post #19536568] Disconnect, verify red = + and black = – with a multimeter, then re-crimp.

Quick 3-step: add new owner without installer

  1. Installer deletes plant in FusionSolar. 2. Owner installs SUN2000 app, taps “Create Installer Account”, enters S/N and e-mail. 3. Log in, add plant, then invite personal “Owner” user. Done.
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