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Fronius Inverter integration stopped working with HC3



Hi there,


So I have HC3 (and HC3L as slave) central and the Fronius SYMO inverter - connected through QA from marketplace.

Till now everything was fine.

Now I'm getting Connection error (on the mail QA instance)

On the console I see: [ERROR] [QUICKAPP20]: Connection refused

I can still access the Fronius gui by the website so this is not the Fronius side issue.

I can also use the strings directly:  http://

Please login or register to see this link.

After that I'm getting what is expected:

    "Body": {
        "Data": {
            "Inverters": {
                "1": {
                    "DT": 110,
                    "E_Day": 22224,
                    "E_Total": 22594500,
                    "E_Year": 7327431.5,
                    "P": 0
            "Site": {
                "E_Day": 22224,
                "E_Total": 22594500,
                "E_Year": 7327431.5,
                "Meter_Location": "load",
                "Mode": "vague-meter",
                "P_Akku": null,
                "P_Grid": 2053.6772569066434,
                "P_Load": -2053.6772569066434,
                "P_PV": null,
                "rel_Autonomy": 0,
                "rel_SelfConsumption": null
            "Version": "12"
    "Head": {
        "RequestArguments": {},
        "Status": {
            "Code": 0,
            "Reason": "",
            "UserMessage": ""
        "Timestamp": "2023-11-02T18:00:33+01:00"


But WHY the QA says connection error?? This stops values to be updated so power production / usage is useless..

The QA works some time (a few minutes) after HC3 restart, so it pickups the data, and then starts to show 'connection error'...:(

What do I do ??

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