Domoticz

Posted: **Sunday 18 January 2026 16:12**

Hi, I made a node-red UI to control the Marstek Venus A via modbus tcp ( no extra hardware required).

It is also suitable for domoticz integration. Just add a few custom sensors.

Node-red flows:
https://flows.nodered.org/flow/3ab454d1 ... 2f30dbe7fc

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Posted: **Tuesday 20 January 2026 4:19**

Looking great!

Posted: **Thursday 22 January 2026 12:36**

Thanks,
Made some Progress: Real use case example:

Domoticz

Control Marstek venus (A), using modbus tcp

Control Marstek venus (A), using modbus tcp

Re: Control Marstek venus (A), using tcp modbus

Re: Control Marstek venus (A), using modbus tcp