The Enphase Envoy acts as a communication gateway between the microinverters and the Enphase cloud. During boot-up, the Envoy attempts to establish communication with each microinverter via power line communication (PLC). Successful communication requires proper network configuration, correct Envoy registration with the Enphase cloud, and up-to-date firmware on both the Envoy and the microinverters. The Envoy relies on API calls to the Enphase cloud for system configuration and monitoring. Delayed or failed API responses can cause reporting issues. Communication is secured via TLS/SSL.