@JulieT66 

Do you plan to buy powerline adapters, or do you have them already? If you have them already, what is their brand name and model number?

  @Alexandre. 
 

Hi,

thanks for the reply, I've already got a set but would need another set to do the whole house. Brand and model name: Tp-Link TL-PA4010PKIT.

  @JulieT66 

Deco M4 should work with powerline adapters the way you expect. The only risk is some powerline adapters are not compatible with Deco Ethernet backhaul protocols. The brand and model you listed should be, but no guarantee until you try.

TP-Link TL-PA4010PKIT is listed as end of life on TP-Link web site, you might not be able to get another pair of powerline adapters of this model.

In case you had to buy different brand and model of powerline adapters, go with those that have single Ethernet port. For some reason, powerline adapters with multiple Ethernet ports per unit have higher chances of not being compatible with Deco Ethernet backhaul.

Your other option is Deco P9, which is equivalent to M4, but with integrated powerline adapters: https://www.tp-link.com/us/deco-mesh-wifi/product-family/deco-p9/

Mind you, you can't use TL-PA4010PKIT together with P9s, but you would not need to.

Whatever you decide to buy, make sure it comes with return policy. WiFi mesh, and powerlines, and especially mixing them is hit and miss. You wouldn't want to be stuck with networking equipment that can't work the way you expected it to.