@TP-Link_Deco For issue #3, I can't connect to the P9s via web browser. Using my ethernet-linked desktop computer, or my Wifi-linked laptop...and two different browsers, if I go to...

@TP-Link_Deco Okay, for issue #1, I clicked on the icon, and it indeed shows all four P9s. But when I click on them individually, I don't see anything about PLC Backhaul. For example, the Bedroom one...

I have four P9 units. Two (kitchen, garage) are hooked up to ethernet, the other two (hall, bedroom) are via Wifi. I have the system set to Access Point so that my main router is handling DHCP...

@Will_W The same thought occurred to me...makes sense that the Powerline feature of P9s would work best if they were all on the same 120VAC line. To that end, I just opened up my subpanel and...