# Fronius GEN24 Modbus Control - how to get it working? **URL:** \ **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:** 4
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [May 22, 2026, 5:52pm UTC](https://community.homey.app/t/fronius-gen24-modbus-control-how-to-get-it-working/155167/4 "2026-05-22T17:52:06Z")
Hi Willem, Perhaps Ronny can show you some possibilities? He uses his Modbus app to control stuff > [@Homevolt battery from Tibber in Homey?](https://community.homey.app/t/homevolt-battery-from-tibber-in-homey/124436/15): > > We are getting a lot offtopic. But last one…I use my Modbus app to control the Fronius Gen24. To set charging/discharging limit, you have to set 2 or 3 registers and one of them bitwise (as int). Modbus is not the best standard for integration. Perhaps Matter offers more possibilities in future if manufactures will add it to their existing products. The Solaredge + Growatt TCP Modbus app might do the job as well (it’s not limited to these 2 brands): > [@\[APP\]\[Pro\] SolarEdge + Growatt TCP modbus](https://community.homey.app/t/45487): > > Purpose The difference of this app and the already existing solar panels app is that this app reads the data directly from the inverter. The solaredge api and others are mostly limited to 300 calls/ day, so you get only updates every 10-15 minutes. The modbus app receives data every few seconds. If you have the Solaredge energy monitor installed you can maximize your self-consumption and limit your exported power by using it. You can make flows based on your generated solar power, exported p… --- _[View the full topic](https://community.homey.app/t/fronius-gen24-modbus-control-how-to-get-it-working/155167)._