Thanks, usefull.
I'm also a bit of an it geek, but I have far less than 600 devices on my network ?.
I have a Google mesh network and I could probably easily extend that with another access point near my carport. Probably better than messing around with PLC connections, although some seem to...
Interesting to read your "research" @Alaistair.
I will set up my HEMS and PMCC shortly, and I have a question about your wifi - is there no challenges with low network strength where your charger is? I assume it's some way from your router.