How do I fix DCI — DC Current Injection on a Growatt?

Power cycle inverter. Allow full self-test Then: Check firmware version and update via ShinePhone or ShineServer if newer version available

Growatt

Error 402

DCI — DC Current Injection

Inverter is injecting more DC current into the grid than the permitted threshold.

Common causes

Internal inverter fault with DC offset injectionFaulty output transformer

What to check

STEP 1

Power cycle inverter. Allow full self-test

STEP 2

Check firmware version and update via ShinePhone or ShineServer if newer version available

Escalate if

Fault returns after power cycle — hardware fault, escalate to Growatt UK support

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