As a new user, for the second morning running, I've woken to the news that my batteries did not charge overnight, despite having a charge window set for 8 slots between 00:00 and 06:00. On both occassions, I've realised that the setting on the Solax inverter 'Charge from the grid' has been set to 'Disable'. And that is why the batteries didn't charge. Changing the setting manually to 'Enable' starts the charging process. Last night, I had a window set between 21:30 and 22:00 and the batteries charged fine during that slot as the 'Charge from the grid' was set at 'Enable'. So I think that whatever message is send to the inverter when the charge window starts is changing the 'Charge from the grid' setting to 'Disable' - thus achieving the exact opposite of what I want the charge window to do. I'm not sure if this is a seting issue on my part or a bug.
There is a second isssue that when the charge window ends, the Work Mode setting on the inverter is set to 'Manual' which then means that the batteries neither charge nor discharge. I suspect that I can resolve this by creating a second charge window with zero slots to run between 06:00 and 00:00.