My question is, since 3 devices are now paired in the electrical network, they act as "repeaters" between them, increasing the speed since there is less loss in theory? or does it just go from the main powerwall to each of them? Would there come a point where destructive interference was created between the devices? because if not, I would buy a couple more to give more scope to the existing ones.

With the tplink software, it tells me the speed between each of the access points, but I think it is because the main "transmitter" is changed, I don't know if I'm right.

This is a mail i send tech suport in spain , but after a month i dont recibe any response , has been translated from spanish , if any neeed any aditional information i will provide it in no time .