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

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  • #571 19928566
    buska3
    Level 12  
    Hello
    And someone zapoda where to buy DDTU666-H at a good price ??
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  • #572 19928660
    xszuflax
    Level 11  
    rokbok wrote:
    roberto33333 wrote:
    I would also like to see on this graphic what value is taken by home appliances and how much goes into the network.


    You will not see how much goes into the network in this graphic, but you can see it in the "Statistics" tab, at the bottom next to "Overview", but you would have to install the DDTU666-H counter for 3F installations or DDSU666-H for 1F installations.


    If you are in Tauron, it is also a non-invasive option with the eLicznik service. Rather, they do not nod and at 100% it is the value that you will see later on the FV. This is what the daily chart looks like. There are also per month and year and meter reading remotely:

    Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar
  • #573 19928688
    roberto33333
    Level 5  
    rokbok wrote:

    You will not see how much goes into the network in this graphic, but you can see it in the "Statistics" tab, at the bottom next to "Overview", but you would have to install the DDTU666-H counter for 3F installations or DDSU666-H for 1F installations.


    I'm not interested in spending PLN 700 on the meter?

    rokbok wrote:

    As for the zero indications, try uninstalling Fusion Solar and reinstalling, maybe there is an error in the app.


    I don't want to uninstall, because this app likes to hang and it may turn out that I won't see anything (once I couldn't log in for 2 weeks, then something bounced her and she accepted the same login and password without any problems). It just doesn't work for friends?

    My question was whether there is some option to check / enable somewhere that I have no idea about to trigger it. Previously, it worked itself, and in the shortened manual on the Huawei website there are pictures that even with the stamp of home devices, it gives a value and also with this energy pole, so somehow you can turn it on or some software version supports it. Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar

    Added after 5 [minutes]:

    Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar
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  • #574 19928698
    rokbok
    Level 38  
    roberto33333 wrote:
    I don't want to uninstall because this app likes to hang


    There used to be problems, now it's fairly normal, the latest version of the app is 5.7.073, check what you have.

    roberto33333 wrote:
    My question was whether there is some option to check / enable somewhere that I have no idea about to trigger it.


    There is no option to turn it on or off, the indications are automatic.
  • #575 19928704
    roberto33333
    Level 5  
    xszuflax wrote:


    If you are in Tauron then .... / quote]

    unfortunately I'm not in Tauron but in Energa


    Added after 6 [minutes]:

    rokbok wrote:


    There used to be problems, now it's fairly normal, the latest version of the app is 5.7.073, check what you have.


    Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar
  • #577 19929496
    roberto33333
    Level 5  
    Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar

    I updated, tomorrow I will see if it worked, because now it is dark and the panels do not produce electricity, thanks for your help
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  • #578 19929596
    akir19
    Level 10  
    Wafel117 wrote:
    Hi,
    There is a way to remotely change the WiFi password? Because I can't find it anywhere.
    For example, the customer collapses a router and buys a second one, at this point we have no communication with the inverter, because the SSID and password are different.
    This can be done from the level of the app or website, or is there a customer visit each time?

    You can connect on the cable, set identical SSID and password on the new access point. Alternatively, charge the client with PLN 400 for arrival ?
  • #579 19929654
    qrko
    Level 14  
    rokbok wrote:
    Download the latest and update, you can download from appGalery, or from the attachment, if you download from the attachment, change the extension from * rar to * apk

    Can you know where did you get the apk from? Are there any older ones from, say, fall 2021 available? New apps want to update the inverters to version 140, and I would like an older one that will get along with the SPC135 inverter without updating.
  • #581 19930012
    piotricz
    Level 10  
    I have a question, can I somehow create or delete an administrator account and then configure everything from scratch? I have a problem with the company that set up the installation for me, namely the owner of the company does not answer the phone and when calling the office, no one knows anything about any support. I wanted to change a few things in the settings but an admin is required for that.
  • #582 19930014
    akir19
    Level 10  
    It is possible for 100%. Nobody has explained it here yet, I will gladly step on the post. For sure, the hujaweja service will help you do this, they act quickly on notifications. You can submit your application in any convenient language.
  • #583 19930230
    rokbok
    Level 38  
    piotricz wrote:
    I wanted to change a few things in the settings but an admin is required for that.


    Log in directly to the inverter using the SUN2000 app, the factory password is "00000a", if the installer has changed it, it is dopa, Huaweia support remains.
    Direct login to the inverter has been described here many times, it can also be done using the WiFi network that the inverter broadcasts and its passwords, everything should be on a sticker on the side of the inverter.
  • #584 19930258
    akir19
    Level 10  
    rokbok wrote:
    piotricz wrote:
    I wanted to change a few things in the settings but an admin is required for that.


    Log in directly to the inverter using the SUN2000 app, the factory password is "00000a", if the installer has changed it, it is dopa, Huawei support remains.
    Direct login to the inverter has been described here many times, it can also be done using the WiFi network that the inverter broadcasts and its passwords, everything should be on a sticker on the side of the inverter.

    I found out that if you don't know the password, you can reset the inverter to the factory settings. It is possible that the Huawei service is doing this
  • #585 19930283
    karol4000
    Level 12  
    The password can be reset by turning the inverter off and on. The entire procedure is described in the manual
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  • #586 19930971
    roberto33333
    Level 5  
    rokbok wrote:
    Download the latest and update, you can download from appGallery, or from the attachment, if you download from the attachment, change the extension from * rar to * apk


    Unfortunately, updating the app to the latest version did not help, they are still zero Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar
  • #587 19931960
    dprzyb
    Level 22  
    I don't think it is an application version issue. Recently, it also showed me zero for several days, although when I switched to the statistics tab, I saw the production graph.
    It just happened after a few days and, for example, today everything is ok
  • #588 19933212
    roberto33333
    Level 5  
    dprzyb wrote:
    I don't think it's an application version issue. Recently, it also showed me zero for several days, although when I switched to the statistics tab, I saw the production graph.
    It just happened after a few days and, for example, today everything is ok


    in my case, in the statistics tab, it also shows the production ... but in the first tab, zero, even though there was information about the current production of PV panels earlier.
  • #589 19933654
    dprzyb
    Level 22  
    Exactly. So it's not the app's fault, but more of their servers or clouds
  • #590 19933704
    qrko
    Level 14  
    Check the color of the LED on Donglu when the first page of the app is all zeros. From what I know, the first page is live and if the dongle will glow red, there will be nothing there. If, for example, it is at the router's range contact and it disconnects every now and then, it may be that the first page will be zero most of the time, and yet the production statistics will match because the inverter has a buffer in which it holds data and sends them when will catch the connection, so it is enough for it to connect e.g. once a day.

    For me, the red LED appears a few x a day for a short time and then the app does not show anything, I have not figured out where it comes from yet, but I suspect that it is the fault of 3 routers with the same SSID, maybe it caught the most distant one during the configuration and now there are circuses.
  • #591 19935760
    arkadiuszg86
    Level 1  
    Hello, I can't configure the inverter.
    Panels ja solar 390 two strings, 9 panels each.
    Huawei inverter
    The voltage is 380V on each string, when I turn on the inverter, the voltage is lost in the application, it shows me no sunlight and no power on the DC side.
    Plus and minus well connected, grounding done. What may be the reason why the installation does not work, can someone help me with this issue. I will not turn to the installer because I did it myself.
  • #592 19935814
    karol4000
    Level 12  
    what time are you trying to configure?
  • #593 19935835
    rokbok
    Level 38  
    arkadiuszg86 wrote:
    The voltage has each string of 380V, when I turn on the inverter, the voltage disappears


    Typical symptom of polarity confusion.

    arkadiuszg86 wrote:
    Plus and minus well combined


    Check again, connect the meter correctly, plus to the red solar cable, minus to the black, I hope that such cables were used, the minus indication is wrong polarity, I would also check if the cables at the panels were not mixed up, e.g. black connected to the plus, red to the minus, then at the inverter it would have to be black as plus, red as minus.
  • #594 19935916
    gitpusher
    Level 12  
    rokbok wrote:
    Check again, connect the meter correctly, plus to the red solar cable, minus to the black, I hope that such cables were used, the minus indication is wrong polarity, I would also check if the cables at the panels were not mixed up, e.g. black connected to the plus, red to the minus, then at the inverter it would have to be black as plus, red as minus.

    Exactly. And remember that if the polarity is wrong, you have to wait until the sun goes out and then disconnect the DC switch in the inverter!
    Otherwise, you may damage the inverter.
  • #595 19936242
    domelek
    Level 17  
    gitpusher wrote:
    rokbok wrote:
    Check again, connect the meter correctly, plus to the red solar cable, minus to the black, I hope that such cables were used, the minus indication is wrong polarity, I would also check if the cables at the panels were not mixed up, e.g. black connected to the plus, red to the minus, then at the inverter it would have to be black as plus, red as minus.

    Exactly. And remember that if the polarity is wrong, you have to wait until the sun goes out and then disconnect the DC switch in the inverter!
    Otherwise, you may damage the inverter.


    What for?! It will turn off the AC first - the inverter disconnects - no production and then disconnects the DC ... the other way around ... first DC then AC, but what is better to do a little after sunset, when the voltages are already lower. DC current is very dangerous ...
  • #596 19936570
    jhahamer
    Level 12  
    domelek wrote:

    What for?! It will turn off the AC first - the inverter disconnects - no production and then disconnects the DC ... the other way around ... first DC then AC, but what is better to do a little after sunset, when the voltages are already lower. DC current is very dangerous ...


    straight from the Huawei manual, way switching on inverter:
    Step 1 Turn on the AC switch between the SUN2000 and the public grid.
    (If Step 3 before Step 1 was performed, the SUN2000 reports an alarm Grid Failure . Inverter
    The SUN2000 will not start normal operation until it clears the error automatically.)
    Step 2 When there is a DC switch between the PV array and
    switch on the DC switch with the inverter.
    Step 3 Switch the DC SWITCH on the bottom of the SUN2000 to the ON position.
    Step 4 Wait approximately 1 minute and observe the inverter LEDs to determine its status.

    greetings
  • #597 19937034
    liseczq
    Level 21  
    Hello

    And I have a question:

    I wanted to upload a newer firmware (the installer recommended me, due to the fact that a DC arc error suddenly crashed).

    Well, I uploaded via the network, but chose the wrong option, "update method with the consent of the user" ....
    Now I can not upload the firmware, because I am constantly informed that another update is in progress. I can't disable this update now, and have no idea how to opt in as a user for this update?

    thank you
  • #598 19937378
    strucel
    Level 35  
    In a few days, if you do nothing, he will get the Authorization timeout Timeout status: 1
  • #599 19937516
    liseczq
    Level 21  
    strucel wrote:
    In a few days, if you do nothing, he will get the Authorization timeout Timeout status: 1


    Thanks, and can't I approve this authorization somewhere? It is a pity that the device was useless for so long.
  • #600 19937674
    domelek
    Level 17  
    liseczq wrote:
    strucel wrote:
    In a few days, if you do nothing, he will get the Authorization timeout Timeout status: 1


    Thanks, and can't I approve this authorization somewhere? It is a pity that the device was useless for so long.

    login as owner not installer, or create an owner account first ... and then login
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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.
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