No connection to GW12K-ETA-G20/WiFi/LAN Kit-20 possible

[storm19921]

The problem

My new GoodWe GW12K-ETA-G20 Inverter uses the WiFi/LAN Kit-20. This Kit has apperently Modbus enabled per default, but no local web server interface anymore.

When I try to connect the Integration to the Inverter during Setup I get an Connection Error when I provide the IP of the Inverter/Dongel.

This maybe the case because the Integration targets standard UDP port 8899, whereas the newer G20 generation inverter with the WiFi/LAN Kit-20 communicates explicitly via Modbus TCP over Port 502.

So I would assume the Integration needs to be updated to work with the G20 generation?

What version of Home Assistant Core has the issue?

core-2026.7.2

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

GoodWe Inverter

Link to integration documentation on our website

https://www.home-assistant.io/integrations/goodwe/

Diagnostics information

No response

Example YAML snippet

Anything in the logs that might be useful for us?

Additional information

No response

[home-assistant]

Hey there @mletenay, @starkillerOG, mind taking a look at this issue as it has been labeled with an integration (goodwe) you are listed as a code owner for? Thanks!

Code owner commands

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• @home-assistant close Closes the issue.
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• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component, problem in config, problem in device, feature-request) to the issue.
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@storm19921 Thanks for reporting this issue!

Before we dive in, please make sure this isn't a duplicate by searching through existing issues. Also check recently closed issues, as your problem might already be fixed but not yet released.

https://github.com/home-assistant/core/issues?q=%20label%3A%22integration%3A%20goodwe%22%20
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goodwe documentation
goodwe source
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[storm19921]

I did search for solutions but cant find any, can anyone give me any leads what may be the issue here, maybe I can fix it myself?

[albyyang-dev]

Using the SolarGo App, ensure "WLAN Control" is also on.