admin OK, just an update. It fully discharged the batteries, posted a "BMS Under Voltage" Notification in My Inverter > Notification and then recharged the batteries and resumed normal operation as far as I can tell at the moment.
There are no notifications of it doing a calibration. The one thing that is odd is that the "Power Graph" appears to have missed a reading at 08.10 which is when I would have expected the export to stop.
but the downloaded logs show there was data, could the bang on 08:15:00 have caused the problem?:
2023-07-04 07:59:54 WAITING
2023-07-04 08:04:56 NORMAL
2023-07-04 08:09:58 NORMAL
2023-07-04 08:15:00 NORMAL
2023-07-04 08:20:02 NORMAL
with nothing untoward in the detail in the rest of the rows.
I'll keep my eye on it...