Please add a UI configurable option to change the IP for a already present device.
Hi and welcome to the HA forum. To get the correct answer you’ll have to put some more effort in your question.
For APsystems type inverters and ECU’s there are a view integrations, I name the most popular: One integration is build into HA (APsystems) for the EZ series inverters. And one is HACS installable: GitHub - HAEdwin/homeassistant-apsystems_ecu_reader: A Home Assistant custom integration for local querying APsystems ECU's.
last mentioned custom integration has the ability to change the IP-address by going to Settings > Devices & Services > Choose the installed APsystems ECU Reader and select Configure.
I could be wrong with my answer. Tell me more about what you are using now and if you are using the EZ series of inverters.