Hi I currently have a P9 system. Two on the ground floor and 1 on the third floor given location of home offices. The one in the attic is not connecting over the powerline backhaul so only on the wifi mesh. Is there a way to change this to boost the signal?

I also want to put one of the P9 units in a shed outside to get internet there and the garden. So I am thinking of getting the M5 3 pack for around the home with the P9 units in the offices and the shed. I presume the P9 needs to be connected to the modem or I would lose powerline functionality?

If I combine a system of the 2 units will I lose any functionality? I had a M3W hooked up before but removed as it seemed to slow down the system a bit but no sure if that was to do with how I set it up?

Thanks

Brendan