Huawei shows alarm 2032 Grid Failure and won't feed in. What do I check before I flip anything?

The short answer

Check for a power cut and AC voltage at the inverter; if the AC switch is off, test for a short before switching it on.

Plain explanation

From the Huawei manual for the SUN2000 inverter: Check whether there is a power cut in the house/street. Installer checks AC voltage at the inverter is normal. The rest of the checklist is below; work through it in order. Installer only: DC and AC work on a live PV system is dangerous, so owners should note the code and call their installer. Grid limits depend on your country, so check your national code and grid operator rules.

Steps from the source

Check whether there is a power cut in the house/street
Installer checks AC voltage at the inverter is normal
Installer checks AC cable and AC switch
If the AC switch is OFF, do not simply switch it on – installer checks for a short/impedance first
Persists → vendor

Source

Huawei Inverter Alarm Reference, Issue 09 (2024-11-01), EDOC1100345192, Alarm 2032, §19, p23files.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.