Which protocol does the Envoy use to collect performance data from microinverters?

• A. Wi-Fi
• B. Zigbee
• C. PLC
• D. Bluetooth

Answer: (C)

Data collection from microinverters in an Enphase system uses Power Line Communication. The microinverters send their performance data over the existing AC wiring to the Envoy, using the electrical lines as the transmission path. This live data includes production, voltage, current, and status information. Because the data rides on the power lines rather than being sent wirelessly from inverter to Envoy, options like Wi‑Fi, Zigbee, or Bluetooth aren’t used for this path. The Envoy then forwards the gathered data to the monitoring service through its network connection (Ethernet or Wi‑Fi). So, the protocol responsible for collecting performance data from microinverters is PLC.