Simply plug a Powerline adapter into a power outlet and connect it to your router’s LAN port via an Ethernet cable. Can you connect a router to a powerline adapter? This won’t be too much of an issue for browsing the internet but could pose a problem if you are trying to stream content off a NAS or send large files wirelessly between devices. While you might be able to maintain a consistent connection, wireless speeds are significantly slower than a wired Ethernet connection.