Here is a internet link with instructions from the Enphase web site:
You can also call the Enphase phone support team to help you.
They are available 24/7 at this phone number: 877-797-4743.
If you still need help, we can come and reconnect your Envoy, however we charge $250 to do this for you if the reason you need to be reconnected is due to a change of your Wi-Fi carrier.
Please call us at:
(833) 876 – 5272
Leave a message with our answering service that you need help reconnecting your Envoy to your Wi-Fi.