Question about TP-Link Re450

No, the repeater can also be connected to a power strip, but this would not be recommended for Powerline. Alternatively, the much better Mesh WiFi technology could be used instead of repeater technology. These usually consist of several routers that build a stable network among themselves. A mesh is much better than a repeater, because the devices can move freely in the mesh network and select the mesh router with the strongest transmission without interrupting the connection. Repeaters cannot do this without interruption.