Correct. 2nd from the right (or the bottom). It’s marked RS485
I’m away at the moment but it looks like my system suddenly started working the day after I left. I suspect the techs at Alpha must have remotely fixed it. The problem must have been with them not the installers.
I switched off the batteries before I left because it was randomly charging from then discharging to the grid!
I hope to get back and switch it all on by Monday
Ah, I hadn’t quite worked out the markings. But it’s immediately obvious. Second from the right will be the one I plug into. Hopefully it all works from there. I will be using an ESPuno with its ESP32-C6 and RS485 terminal, and Adafruit screen (Adafruit 128x64 OLED Bonnet for Raspberry Pi).
Hopefully it all comes together I’ll update when I have parts.
@worldvirus for our inverter, were the rj45 pins any different to the GitHub repos?
no the pins were as described. The 2 centre pins.
Sweet, I’ll update when its all together with a photo for the repo 
All setup and running!
I made a fork of the project and converted it to PlatformIO and added some extra debugging with the RGB LED the ESPuno dev board (link) provides, nothing major.
