In message ,
Tricky Dicky writes
My Son in law wants to use powerline alongside wifi. He has a split
supply CU with separate upstairs and downstairs ring mains, will this
cause connection problems?

I have used Solwise units, and they are fine. Our mains cabling is a
nightmare, with one main on/off box supplying four fuse boxes, and
cables all over the place. Large Victorian house with cabling added and
replaced over the years. The units just work. We also have a shop
attached to the house, with separate mains supply. The Solwise units do
not bridge the gap between the two, as expected.

I realise we may be causing interference elsewhere, but the possibility
is fairly remote. Thick, solid granite walls kill wifi, which is why we
use powerline units. The chances of signals escaping and causing havoc
elsewhere are fairly remote.

--
Graeme