How do I fix DC Input Voltage Too High on a Enphase?

Confirm only one module is connected per microinverter. Verify module Voc at STC does not exceed IQ MI maximum Then: Check wiring — ensure no parallel module connections have been made at a single MI

Enphase

DC Too High

DC Input Voltage Too High

Module voltage exceeds the microinverter's maximum input voltage.

Common causes

Module Voc exceeds MI maximum (unlikely with correctly selected MI)Multiple modules connected to one MI port (incorrect installation)

What to check

STEP 1

Confirm only one module is connected per microinverter. Verify module Voc at STC does not exceed IQ MI maximum

STEP 2

Check wiring — ensure no parallel module connections have been made at a single MI

Escalate if

One module per MI confirmed and voltage is within spec — escalate

Need full interactive diagnosis?

Faultpath walks you through decision trees, fault codes, and commissioning — built for solar & battery engineers.

Open Faultpath

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

Crit Temp

Critical Temperature