Charge Times after Inverter update

I had my solar commissioned on Monday which requires a re-commission of the Inverter (I have 20kw 3ph). Afterwards I checked the charging/discharging times and they were as expected.
However, yesterday I noticed that the battery, since Monday, had been charging 0000-0530 instead of 0030-0530. I rechecked the schedule and all was as expected starting 0030!
I'm bemused as to how the software can pick up an erroneous start time but the correct stop time! Any ideas?
I reset to 0100-0530 for last night and that has worked OK ... so I'll now reset to 0030 for tonight.

Nil Desperandum I rechecked the schedule and all was as expected starting 0030!

Did you force the portal to read the value from the inverter. If not, it was showing its cached copy. Changing it to something else then back to the value you want is a good way to ensure both sides are in sync.

Nil Desperandum Have you checked the time zone set up in the account settings in the portal

[unknown] yes thanks I suspect that was it