# Fronius GEN24 Modbus Control - how to get it working?

**URL:** <https://community.homey.app/t/fronius-gen24-modbus-control-how-to-get-it-working/155167>\
**Category:** Apps\
**Created:** [May 21, 2026, 1:18pm UTC](https://community.homey.app/t/fronius-gen24-modbus-control-how-to-get-it-working/155167 "2026-05-21T13:18:43Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![RonnyW](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ronnyw/32/10879_2.png) [@RonnyW](https://community.homey.app/u/RonnyW)\
**Post date:** [May 22, 2026, 8:36pm UTC](https://community.homey.app/t/fronius-gen24-modbus-control-how-to-get-it-working/155167/7 "2026-05-22T20:36:55Z")

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The local Fronius API (REST API used by the other apps) is readonly access. It can only read realtime data.

In addition there is a Solarweb cloid API to get additional data.

I’m using the HomeAssistant Integration, because it combines both. Then I just import the data to Homey via HA community app.

I made and use the Modbus TCP app to control some special settings for my Gen24. You don’t have many possibilities, that’s why I just used basic Modbus instead of implementing an app.

I use Modbus for:

- limit battety usage while car charging from grid
- force battery charging from grid (winter at night based on price)
- you can set minimum battery level
- but not so much more.

See details if you want to try:

> [@\[APP\]\[Pro\] Modbus - Connect every Modbus devices](https://community.homey.app/t/app-pro-modbus-connect-every-modbus-devices/104497):
>
> Modbus A small tool to add every Modus/TCP device to Homey [[HomeyPro\_Modbus\_AppLogo]](https://homey.app/a/org.modbus/) This tool allows to add any Modbus/TCP device to Homey without a specific app. You can read and write Modbus register with flows. How to start? Add a device. Insert the Modbus details of your device including IP address, port and Modbus device ID. The Homey device doesn’t offer functionality. It only connects to your Modbus device. How to…

Check the examples on my blog

> **[Modbus – Ronny Winkler](https://rwdevelopment.de/homeypro-apps/modbus/)**

> **[Modbus: Anwendungsbeispiel – Ronny Winkler](https://rwdevelopment.de/2024/02/20/modbus-anwendungsbeispiel/)**

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