I currently use TL-PA4022P AV600 powerline adapter. My NAS and laptop and a couple of other devices connect to those over ethernet. Speeds are not the best but the connection is very reliable.

I am looking to upgrade and torn between another powerline adapter such as the WPA8630P which will additionally give me wi-fi, but separate networks and not mesh.

Now if my devices are connected to a remote Deco P9 unit over wired ethernet, will it actually be using POE or using the mesh wifi to carry the signal?

Also, does the P9 use MIMO like the WPA8630P? I.e. use the ground wire?

I have a lot of electrical interference in the house and don't want to rely on wi-fi for critical devices, hence the question.

Thank you.