What is PLC used for in Enphase systems?

• A. Communicating data between the Internet and your phone
• B. Sending data from Enlighten to your microinverter
• C. Sending data from the Envoy to Enlighten
• D. Communicating between the Envoy and microinverters

Answer: (D)

Power Line Communication (PLC) is the in-home link that carries data over the existing electrical wiring. In Enphase systems, the Envoy gateway uses PLC to talk to every microinverter on the AC wiring, sending commands and gathering performance data from each inverter. This setup lets the Envoy monitor the system locally and then transmit the collected data to Enlighten (the cloud) over the Internet for remote access. The other paths described involve data over the Internet or cloud, not the in-house PLC link, so the role of PLC is specifically the communication between the Envoy and the microinverters.