How do I fix Firmware Mismatch on a Growatt?

Check DSP and ARM firmware versions in ShinePhone. Both should be the same release version Then: Do not attempt to reflash on site without Growatt guidance — contact Growatt UK support

Growatt

Error 418

Firmware Mismatch

DSP and/or ARM firmware versions are incompatible.

Common causes

Partial firmware update (power cut during OTA update)Wrong firmware package applied

What to check

STEP 1

Check DSP and ARM firmware versions in ShinePhone. Both should be the same release version

STEP 2

Do not attempt to reflash on site without Growatt guidance — contact Growatt UK support

Escalate if

Always escalate firmware mismatch — incorrect reflashing can brick the inverter

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More Growatt fault codes

Error 200

AFCI — Arc Fault Detected

PV Isolation Low (RISO)

Error 300

AC Voltage Out of Range