One inverter - Two Home Assistants

[juanka99]

Hi,

My question is simple:

Could it possible to use an rj45 splitter to use the inverter data for two different Home Assistants at the same time?

Thanks!

[juanka99]

Hi @kellerza. Is it possible that if I try to do this it will cause a problem in the BMS-485 connection of the inverter? In Spain we say that experiments should be done with soda...

[kellerza]

I'm not sure this will work. Electrically the RS485 can handle a "bus" - so multiple senders&receivers on a wire.

But the addon will try to read & write at the same time.

Other options:

1. Both HASS connect to the same MQTT server
2. Make the main MQTT server forward certain paths to the second MQTT server

Then you read the inverter once and send the data to both HA's

[reedy]

I'm not sure this will work. Electrically the RS485 can handle a "bus" - so multiple senders&receivers on a wire.

Indeed. Those splitters basically just make it so you can use 4 of the wires for ethernet on one device, and 4 for another. It doesn't split/share any of the individual wires.

Can be seen better documented on things like https://www.instructables.com/How-to-make-your-own-Ethernet-%22splitter%22/

[kellerza]

See a proposal for the MQTT solution - #297