How do I fix Pairing / Discovery Failure on a Enphase?

Confirm the MI is producing DC (check at module terminals) and AC is present. Open Installer Toolkit and run discovery scan Then: Check MI serial number is in the Enlighten system under the correct site. Ensure Gateway firmware is current

Enphase

Pair Fail

Pairing / Discovery Failure

IQ Gateway has failed to discover or pair with one or more microinverters during commissioning or after a reset.

Common causes

MI not powered (no PV input or no AC)MI serial number not added to Enlighten systemPLC signal interferenceOutdated Gateway firmware

What to check

STEP 1

Confirm the MI is producing DC (check at module terminals) and AC is present. Open Installer Toolkit and run discovery scan

STEP 2

Check MI serial number is in the Enlighten system under the correct site. Ensure Gateway firmware is current

Escalate if

MI is powered (both DC and AC) and serial is in system but pairing fails — MI or Gateway hardware fault, escalate

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More Enphase fault codes

ACVOOR

AC Voltage Out of Range

ACFOOR

AC Frequency Out of Range

DC Res Low

DC Resistance Low (Ground Fault / GFDI)

DC Too Low

DC Input Voltage Too Low

DC Too High

DC Input Voltage Too High