Powerline adapters are a pretty cool way to keep your network wired without having to run cables through the walls, particularly handy if you are renting your place (but even if you own the house and you don’t feel like doing this type of work).
Obviously, wiring the house would be the best choice, but when this is not possible, powerline adapters are a very good alternative, and probably still better than just connecting every device via Wi-Fi.
However, the performance of these adapters vary based on a lot of factors, from the distance between the adapters, the quality of your electrical system and, perhaps most importantly, where you decide to plug your adapters into.
Every powerline manufacturer recommends to plug them directly into a wall socket for maximum performance. You should avoid plugging them in anywhere else, including power strips or UPSs. If you do, they will likely still work, but you won’t get the maximum throughput supported.
I used to have a long ethernet cable running from my core switch in the office to the router in the other room, but since getting a dog who apparently loves to eat copper, I had to find an alternative. I removed the chewed ethernet cable and added two powerline adapters into my network, so it was a great opportunity to run some basic performance tests to see how positioning the adapters will affect the network speed. Here are the results.