The short answer
Use the Enphase App's 'Connect Gateway to the Internet', put the gateway in AP mode and pick the Wi-Fi.
Plain explanation
From the Enphase manual for the IQ Gateway / Envoy: Enphase App: Connect Gateway to the Internet > Connect. Turn on AP mode (press AP button). The rest of the checklist is below; work through it in order. Owners can do the app and visual checks; any work on the wiring is for the installer.
Steps from the source
- Enphase App: Connect Gateway to the Internet > Connect
- Turn on AP mode (press AP button)
- Select Wi-Fi
- Follow steps
Source
Enphase Solar Troubleshooting Guide ING-00061-2.0 (2025-08-14), p6, p11enphase.com ↗
Where installers ask this
- Gateway not reporting but connected to WiFi (r/enphase)
- reddit.com/r/enphase/comments/1nfcnsp/
- reddit.com/r/enphase/comments/1q7i1th/
- reddit.com/r/enphase/comments/1p1gkhi/
- reddit.com/r/enphase/comments/1uxg7mt/
General guidance based on the manufacturer's manual or the named source. Always follow the current manual for your exact model and your national code. DC and AC electrical work is for qualified installers only. Not affiliated with or endorsed by any brand named; trademarks belong to their owners.