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

Bob271 430452 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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  • #931 20277084
    qrko
    Level 14  
    I also have 147/130 made by the website and I do not see anything newer.
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  • #932 20277776
    tumak5
    Level 16  
    Robyn212 wrote:
    qrko wrote:
    How much resistance do you have measured in the new app? For me, it shows 3M?.

    For me the same


    So much for me too.
  • #933 20278160
    Jacejek
    Level 14  
    For me too, the same. It seems that this is the upper range of the measured parameter and only when the pants below it can show something ... you need to do a test and earth it, for example, through a resistor so that it is below the 3M then you will know if it measures something or only gives a constant value stored in the program :-) . The inverter itself, during the start of synchronization with the grid, has a step that is described in the app as an insulation resistance measurement, so something probably checks ...
  • #934 20278169
    Math13
    Level 14  
    tumak5 wrote:
    Robyn212 wrote:
    qrko wrote:
    How much resistance do you have measured in the new app? For me, it shows 3M?.

    For me the same


    So much for me too.


    I also have 3M?.
    As for the temperature. It only shows it in real time.
    I still do not see this option in historical information, which is a pity, because it is an important and interesting parameter.
    Do you have that too?
  • #935 20278202
    qrko
    Level 14  
    In the app, yes. I have a short-circuited inverter with HA and thanks to this I have access to the temperatures from all day. During the season, he reached 70C with his light hand at the peak of production. I added 6 60mm fans triggered when exceeding 50C and they have no major problem with maintaining the set temperature. Probably 2-3 degrees lower to go down but I don't have time to play.
  • #936 20278347
    Math13
    Level 14  
    qrko wrote:
    In the app, yes. I have a short-circuited inverter with HA and thanks to this I have an overview of the temperatures from the whole day. During the season, he reached 70C with his light hand at the peak of production. I added 6 60mm fans triggered when exceeding 50C and they have no major problem with maintaining the set temperature. Probably 2-3 degrees lower to go down but I don't have time to play.


    I am also thinking about such a solution and adding fans. However, I have no idea how to solve it yet.
    Do you have your windmills connected to a 220V power supply and triggered by a temperature sensor mounted between the rear ribs of the inverter?
    I would be obliged for some information, e.g. type of power supply, fan parameters, sensor type, etc.
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  • #937 20278515
    qrko
    Level 14  
    A total makeshift. 6 12V fans connected with each other with wires, suspended under a heat sink. Wiring connected in parallel and connected to a 12V 1.8A power supply. The power supply is connected via a smart socket, and it is scripted in HA for activation at 50C on the inverter and deactivation at 48C.
  • #938 20278638
    domelek
    Level 17  
    I also have 4x Arctic 80 x 80 mm F8 TC (variable rotational speed) fans connected to the HA - they turn on from 40C ... Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar
  • #939 20284595
    zlisieckiiu
    Level 8  
    Bob271 wrote:
    ... I can't connect to the network using the WIFI Dongle, the dongle is on and blinking red...
    I had the same problem and it started working after some time. No good description in the user manual. Usually it's about some detail, like transferring a password.

    Bob, if the app works, you get a graph on your mobile showing how much electricity your device is producing. But what are you going to do next with the graph? You can set up reporting at https://eu5.fusionsolar.huawei.com. Then you will receive the raw numbers by e-mail, with which you can do something further.

    And here I have another question. What cables did you use to connect the installation? The nominal data of this device are, for example, here:
    https://sklep.sunprofi.pl/inwertery-huawei/254-huawei-sun-2000-5ktl-m1.html - they were not in the package! acc. for this, the DC input current has a maximum of 11 A, and the AC output current is 8.5 A. In shops selling cables, it is said at 5kW - the cross-section of a solid copper cable must be 6 mm2. My installer gave a 4mm2 cable and still had difficulty plugging it into the supplied plug. Do I have a cable with a utility current directed to the apartment, change it to 6 mm2, e.g. here. cable cheaper, PLN 18.5 per m2, in hypermarkets, PLN 37 per m2. Should you leave the 4 mm2? Doesn't the protection itself (yellow-green) have to be 6 mm2?
  • #940 20284753
    qrko
    Level 14  
    The cross-section you are writing about is rather for 1 phase. With three phases, these 5kw make 1.66 per cable, which is much less than an iron or a washing machine. Most of my friends have installations plugged into the power socket to which the 5x2.5 cable went. I had it myself 11 months ago and it worked fine but I pulled a 5x6 a week ago on the occasion of the renovation of the main switchgear, thanks to which I have a spare and I can jump from the AC switchgear to a car charger or heat pump in the future.
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  • #941 20284920
    zlisieckiiu
    Level 8  
    Thanks for the answer. The instruction from Huawei says: for AC power cable from the panels to the apartment 4 - 6 mm2,
    depending ... not on the power of the panels, but depending on the power of the fuse through which electricity enters the apartment
    from the power plant, because such current can go from the power plant to the inverter! Logic !

    Hmm, since you changed from 5x4 to 5x6, I will also have such ambitions, Thanks for the comments.

    Did your 6mm solid copper cable go easily into the plug that came with the inverter?
    My installer complained that it wouldn't go in!
    And it will probably be solid copper, not braided.

    What about the cable between the inverter and the batteries? What is the cross section there?
    I don't have any batteries yet. I'll probably add them in a few years when their prices come down.
    But the cable should already be laid.

    The instructions say 5, maximum 10 meters distance to the battery.
    And I have an inverter in the attic, and batteries in the basement, i.e. 20 m below.
    I'm a bit afraid of putting the battery in the attic, because it's heavy, moisture. And the cellar is dry, clean, at a constant temperature, well closed. If something spills out of them, a ceiling board in the attic, a nice stoneware floor in the basement.
    That's why I prefer a cable that will carry these 20 m. I guess this should work. What do you think about it ?
  • #942 20285017
    Math13
    Level 14  
    zlisieckiiu wrote:
    And I have an inverter in the attic, and batteries in the basement, i.e. 20 m below.
    I'm a bit afraid of putting the battery in the attic, because it's heavy, moisture.


    An inverter in a damp attic when your basement is dry?! Surely you had to haul power cables from the garage to the attic anyway. Wouldn't it be better to do the opposite and run the cables from the panels to the garage?
    I sent back all the companies that offered me "your" solutions (inverter in the attic, not in the garage). ;-)
  • #943 20285334
    zlisieckiiu
    Level 8  
    This attic isn't that bad. The inverter is well shielded, bolted to a thick,
    previously leveled dry wall.
    I was advised against closing due to the necessary ventilation.

    It is a pre-war building with four floors and thick walls made of full brick.
    I live on the top floor myself. This is where the power draw from the power plant is for me.
    The inverter is 5m cable above me. It is this cable that I would like to change from 5x4 to 5x6 mm?.

    It is 20 m down to the basement. Here, the installer has also already given the H05RR-F 3G x 2.5mm? stranded cable.
    My question - is it correct?

    The next question will be about the solar cable, but I'd have to go up on the roof.
    The panels themselves won't take much power, but I may want to add a few more at some point,
    Power consumption from power plants may increase in the future.
    The power of the battery may increase, although I have the impression that humanity will not be able to cope with energy storage for a long time.
    There's also a generator in the basement in case the power plant fails.
    in my city.
    I edited.[TM]

    Added after 20 [minutes]:

    jurijknutsson3 wrote:
    Hi, does anyone know what error 2064 id12 means?
    This is "The inverter self-recovery after device abnormal alarm: https://forum.huawei.com/enterprise/en/the-in...r-device-abnormal-alarm-2064-12/thread/643453 -100027
  • #944 20293149
    Jacejek
    Level 14  
    Another update for the SUN ver. SPC148. Can anyone tell me what changes are made by the manufacturer?
  • #945 20293184
    domelek
    Level 17  
    Jacejek wrote:
    Another update for the SUN ver. SPC148. Can anyone tell me what changes are made by the manufacturer?

    4.1 What's New
    4.1.1 Feature
    4.1.1.1 New Feature
    ON.
    4.1.1.2 D?š??žš Feature
    ON.
    4.1.1.3 Optimized Feature
    1.Solved the problem that the V2 optimize
  • #946 20293854
    bogdan11
    Level 11  
    Please share the firmware dongle file. I have version 124 and newer Huawei support is available only to customers. I'm just a user?
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  • #947 20294088
    domelek
    Level 17  
    bogdan11 wrote:
    Please share the firmware dongle file. I have version 124 and newer Huawei support is available only to customers. I'm just a user?


    Please...to the inverter. I'm waiting for authorization for the dongle, maybe one of my colleagues already has the last version is 130 (it was 132 but they withdrew). Via HTTP with installer permissions you can update from the arrow...

    I added to the dongle...
    Attachments:
    • SDongle_V100R001C00SPC130_package.zip (3.48 MB) You must be logged in to download this attachment.
    • SUN2000MAV100R001C20SPC119_package.zip (2.1 MB) You must be logged in to download this attachment.
  • #949 20299040
    jacekstrzyz1969
    Level 5  
    Added after 4 [minutes]:

    there is a new firmware for SPC148 inverters
    Attachments:
    • SUN2000MAV100R001C00SPC148_package.zip (3.4 MB) You must be logged in to download this attachment.
  • #950 20315938
    juha
    Level 11  
    In about 3 weeks, a friend's company from the FV industry will be installing panels in my house. On my own, after exploring the subject, I chose the Huawei sun2000-6ktl-m1 inverter. I found a new one (packaged) at a bargain price, I went and bought it. As I began to explore the topic, why so cheap, I came to the fact that it is from Chinese distribution and that's how I came across this topic, where I got a little scared reading this thread.
    I would like to systematize everything before installation and I am asking for advice on how to do it best from the beginning. Generally, I want to be able to monitor energy production as comfortably as possible.
    As of today, I know that the Fusion Solar website is theoretically used for this, there are 3 Fusion Solar applications, Solar Home and Sun2000, that I will have a problem with creating an account on the website due to the use of a Chinese inverter in Europe. I bought the SDongleA-05 dongle for the inverter, because it was not with the inverter (the box was packed).
    Should I update the firmware or not? Or will it update itself?
    Will any of the applications work, will I have to read the energy production data only from the LAN side, will I have to use the wifi of the inverter or the wifi dongle that I bought? If I have to do it from the LAN side, will I be able to use the Huawei application, if so, which one, or do I have to do it using Home Assistant using some kind of integration?
    What about these network codes, if there will be 2 Chinese and one Custom, I understand that Custom will require you to provide all the parameters yourself, any tips on how to set it up correctly?
    As you can see, there are a lot of questions, I care about a specific hint that I will have to use this or that program, in one way or another. Do it, don't do it, register here or there, do it on a user or installer account.
    Thanks for any tips
  • #951 20316030
    domelek
    Level 17  
    I also have Chinese, but I installed it before they banned it, so everything works for me, the configuration can be handled even in Chinese (2 tablets with google LENS) if you have HA, you will do your own monitoring (integration is ready), I also recommend the DTSU666 counter with a translator for less money...
  • #952 20316142
    juha
    Level 11  
    domelek wrote:
    I also recommend the DTSU666 counter with a translator for less money ...


    You mean Chint DTSU666? Does it differ from Huawei's DTSU 666-H 3F apart from the name and price? Is Huawei only harrowing a cheaper device?
  • #953 20316318
    Math13
    Level 14  
    domelek wrote:
    ... if you have HA, you will do your own monitoring (integration is ready)


    Could you suggest what and how to install on your computer and where to look for this "ready integration" to use HA?
    Any tips, a link to a website or any description on the net?
    Maybe there is a topic about this on elektroda.pl that I can't track down?
    I will be grateful.
  • #954 20316622
    domelek
    Level 17  
    Math13 wrote:
    domelek wrote:
    ... if you have HA, you will do your own monitoring (integration is ready)


    Could you suggest what and how to install on your computer and where to look for this "ready integration" to use HA?
    Any tips, a link to a website or any description on the net?
    Maybe there is a topic about this on elektroda.pl that I can't track down?
    I will be grateful.


    Look for Huawei Solar integration in HACS, installation is simple, you just need to know your local IP of your dongle..
  • #955 20331254
    limesdes
    Level 1  
    Respected,
    I bought the Chinese version of the inverter SUN 2000 5KTL M 0.
    I use the SUN 2000 application.
    After logging in, a message appears on the android "The device applies only to Chinese mainland if the device is used in other regions, the warranty service will not be provided and the display language will be switched to Chinese".
    The Chinese language remains on the display in the application and I have a problem with setting up the inverter.
    How to set the language on the screen to English?
    Thank you for your help.

    limesdes
    Alexandar
    Attachments:
    • 20221212_151954.jpg.pdf (211.61 KB) You must be logged in to download this attachment.
  • #956 20356078
    rafalski_crx
    Level 11  
    Hello dear :)

    Please let me know if I can connect 3 optimizers on one string and 1 optimizer on the other string to the 5ktl-m1 inverter. The instruction from the sun2000-600W optimizer says a minimum of 4 pcs, but does it apply to one string? Or maybe the sum of optimizers on two strings?


    best regards
    Raphael.
  • #957 20361278
    PiotrPokora
    Level 4  
    Rhaavir wrote:
    As I often mount Huawei:


    I advise you NOT to change the default WiFi password of the inverter - the reason is simple, Huawei sometimes has problems with reset and the procedure has to be repeated many times. And if we forget the password, we can have a problem.

    Inverter RESET :
    The inverter MUST run for at least 3 minutes!!! before starting the procedure. In my experience, turn off AC and DC, wait 10 minutes, turn on AC and DC, and wait about 10 minutes again, so that the inverter will run for more than 5 minutes. Then we proceed to the reset.




    I changed the factory password and let's call it in a nutshell "I don't remember" the new password.
    When entering a new one, I slipped my finger somewhere and the password is different than what I was sure of. I don't know which character in the password could be different - I've tried many possibilities and I give up.

    Is it really possible to reset the inverter by turning it off?
    How exactly do you do this reset?
  • #958 20361286
    lizak1983
    Level 15  
    Password reset is described in the inverter manual and looks like this:
    Spoiler:
    Step 1 Make sure the SUN2000 connects to AC and DC power supplies
    simultaneously. Indicators 1 and 2 are green or flashing in long periods
    intervals for more than 3 minutes.
    Step 2 You must do the following within 4 minutes:
    1. Turn off the AC switch and set the DC switch
    on the bottom of the SUN2000 to the OFF position. If the inverter
    The SUN2000 is connected to the battery, turn off the battery switch. wait until
    until all the LED indicators on the SUN2000 panel turn off.
    2. Turn on the AC switch, set the DC switch to ON and wait
    about 90 seconds. Make sure the indicator is flashing green w
    long intervals.
    3. Turn off the AC switch and set the DC switch
    in the OFF position. Wait until all indicators are on
    The LEDs on the SUN2000 panel turn off.
    4. Turn on the AC switch and set the DC switch
    in the ON position. Wait until all indicators on the panel
    of the solar inverter will flash and turn off 30 seconds later.
    Step 3 Reset your password within 10 minutes. (If it doesn't stay in 10 minutes
    no operation performed, all inverter parameters will remain
    unchanged).
    1. Wait until the indicator flashes green w
    long intervals.
    2. Obtain the initial WLAN hotspot name (SSID) and initial password
    (PSW) located on the label on the side of the SUN2000 and connect to
    app.
    3. On the login screen, set a new login password and log in to
    application.
    Step 4 Set the parameters of the router and management system to implement management
    remote.
    Setting the parameters of the router
    Log into the FusionSolar app, select Upload accordingly
    operating devices > Settings > Communication setup >
    Router connection settings and set router parameters.
    Setting the parameters of the management system
    Log into the FusionSolar app, select Upload accordingly
    operating devices > Settings > Communication setup >
    Configuration of the management system and set the parameters of the management system.
  • #959 20361291
    PiotrPokora
    Level 4  
    rokbok wrote:
    dprzyb wrote:
    Where are the inverter options?

    Go to the inverter and try this:

    1. Sign out of the FusionSolar app
    2. Turn off data traffic on your smartphone
    3. Find the inverter WiFi network on your smartphone and connect to it (SSID is given on the side of the inverter)
    4. Click the upper right corner of the FusionSolar login screen (three dots)
    5. Select "Device commissioning"
    6. Scan the QR code on the side of the inverter
    7 Enter the password: 00000a and you are in the settings.

    If the fitter has changed the password to the inverter, you can't do anything if he doesn't give you the current one, but I don't understand what it means that the fitter restricts your access to your property, take him on the rug and talk him out of it.
    If he still does not want to cooperate, then request the deletion of your account and you will set up an installer account and a user account yourself.


    What if I can't recover my inverter password anyway? If I do not get the password from the installer, how do I log in to the inverter after creating a new installer account? Password 000000a does not work because it has been changed
    Is there any other way to reset the inverter?
  • #960 20361731
    domelek
    Level 17  
    PiotrPokora wrote:
    rokbok wrote:
    dprzyb wrote:
    Where are the inverter options?

    Go to the inverter and try this:

    1. Sign out of the FusionSolar app
    2. Turn off data traffic on your smartphone
    3. Find the inverter WiFi network on your smartphone and connect to it (SSID is given on the side of the inverter)
    4. Click the upper right corner of the FusionSolar login screen (three dots)
    5. Select "Device commissioning"
    6. Scan the QR code on the side of the inverter
    7 Enter the password: 00000a and you are in the settings.

    If the fitter has changed the password to the inverter, you can't do anything if he doesn't give you the current one, but I don't understand what it means that the fitter restricts your access to your property, take him on the rug and talk him out of it.
    If he still doesn't want to cooperate, request the deletion of your account and you will set up an installer account and a user account yourself.


    What if I can't recover my inverter password anyway? If I do not get the password from the installer, how do I log in to the inverter after creating a new installer account? Password 000000a does not work because it has been changed
    Is there any other way to reset the inverter?

    And 00000a works?
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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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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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