A powerline adapter is a pair of devices used to connect your Enphase envoy to the router. There should be one adapter connected to the router and another plugged into the envoy.
Powerline adapters work in pairs. You should have at least two powerline products to build a powerline network.
Plug the powerline adapter directly into a wall outlet. Do not plug the powerline adapter into a power strip, extension cord, or surge protector.
Once the powerline adapters have been paired, place one in a power outlet close to the router and the other next to your Enphase envoy.
With the provided ethernet cables, connect one device to the router and the other to your Enphase envoy. After 5-10 seconds, all LED's should be green on both devices.
Your Enphase system should be back online within 10 minutes.