Huawei inverter derates and shows alarm 2063 Overtemperature. Is the unit faulty?

The short answer

Usually not: check ventilation, ambient temperature and airflow around the heatsink before calling support.

Plain explanation

From the Huawei manual for the SUN2000 inverter: Check the inverter location: ventilation and ambient temperature. Clear anything blocking airflow around the heatsink. 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

Check the inverter location: ventilation and ambient temperature
Clear anything blocking airflow around the heatsink
If ventilation is poor or the room is too hot, improve ventilation/shading
Persists → vendor / Huawei support

Source

Huawei Inverter Alarm Reference, Issue 09 (2024-11-01), EDOC1100345192, Alarm 2063, §33, p38files.keno-energy.com ↗

Where installers ask this

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.