Huawei inverter drops out at midday with alarm 2034 Grid Overvoltage. Can I just raise the limit?

The short answer

No. Measure the grid voltage first; change the overvoltage threshold only after the grid operator agrees.

Plain explanation

From the Huawei manual for the SUN2000 inverter: Only now and then? The grid may be briefly abnormal. The inverter recovers by itself once the grid is normal. Happens often? Check whether the grid voltage is within the allowed range. 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

Only now and then? The grid may be briefly abnormal. The inverter recovers by itself once the grid is normal
Happens often? Check whether the grid voltage is within the allowed range
Not within range? Contact your local power operator
Within range? Change the grid overvoltage protection threshold only after the local power operator agrees
Check whether the grid peak voltage is too high. Frequent and long-lasting? Contact the local power operator

Source

Huawei Inverter Alarm Reference (EDOC1100345192), Alarm 2034 Grid Overvoltage. Checked in Issue 10, section 21, page 25. No change to this alarm up to Issue 12 (2025-10-20).support.huawei.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.