I have had a 9.5kWh battery and 3kW AC inverter for about 6 weeks. This was supplied with a 4G dongle that only worked intermittently due to a poor signal. I had managed to set this up to charge to 100% from 00:30 to 04:29 during one of the brief periods when it was online.
Yesterday I got my WiFi dongle set up and running. The installer needs to do a calibration which will fully discharge the battery so yesterday I changed the timed charge settings to charge to 20% between 00:30 and 04:30. This change was definitely saved as I can see it in the inverter logs. However, last night the battery charged to 100% and the inverter settings have reverted to charging to 100% between 00:30 and 04:29.
I think this must be a bug - has anyone else had this problem and how do you work round it?