BST has made my system an hour out

I have two AIOs in parallel, set to start charging at 23:30 but their clocks are an hour out so they don't start until 00:30

I can't see where to change the timezone or clock. How do I fix this?

Check which timezone you have under account settings (web portal) - it should be set to London (GMT+1) then re-sync your inverter time

[unknown] it should be set to London (GMT+1)

I tend to avoid using the term GMT since different companies seem to treat it differently. To me, it is always close to UTC, whereas for many it means the local time in London, and so is UTC+1 during the summer.

My inverter page is describing my time zone as
"(UTC+1) Greenwich mean time (London)"

DD that's how Givenegy describe it, so if looking for it in a list...

Thank you! I needed to do the resync, problem solved ☺️