ABB terra AC modbus TCP/IP

[JernejHren]

I spent too much time figuring out how to connect ABB terra AC to EVCC so here is short writeup.
I am Home assistant user and wanted to find simplest way to integrate ABB tera to it. As it does not have in HA integration and I wanted to avoid OCPP to be able to still use original ChargerSync app. I found ECCP and installed it through HACS without problems.

My goal was to connect it via Modbus TCP/IP. Charger was connected to my network over WIFI. After looking around I found out this charger do not support modbus TCP/IP over WIFI.
After connecting it to ethernet cable, charger got Its IP, and internet connection worked. Then I had to enable local controller through ABB TerraConfig app. After enabling local controller and choosing Modbus TCP/IP you have to configure network communication. Here I lost a lot of time. Where you enter IP adress you have to enter IP adress of the ABB charger not IP of the home assistant server. Network mask and default gateway were standard for my network and port is 502.

After that I was able to configute EVCC through experimental view without problems (charging station and shellly 3pm power meter and Solaredge inverter).

As my charger is LCD version with 2 ethernet connectors I tought I could use one for modbus TCP/IP and other one for internet connection. I found in documentation that second ethernet connector to connect multiple chargers to share dynamic load balancing.

For this charger to work, you need sponsor token. For now I am using Trial token. I tested controling charger through EVCC app. I can change charging modes, configure minimal and maximal charging current and charger works as expected. Only thing I am missing is possibility to start charging session if I do not start iz with RIFD card on the charger as it is not in free use mode.

[mfuchs1984]

You can activate free mode and let evcc ensure only known vehicles can charge without explicitly starting charging. To achieve this, you can set the loadpoint mode in your evcc config to off and the vehicle mode to e.g. pv. So the loadpoint ist off by default, but as soon as your car is identified, evcc will switch the mode.

[barankaynak]

I can't configure modbus tcp/ip. I am sure that I gave charger's ip address. I also disabled ethernet.

Here is the TerraConfig error:
Configuration not succesful
We could not configure modbus parameters

[JernejHren]

You have to have charger with screen. The one without screen does not support modbus over lan as far as I know.