Spent a along time trying to find out why my BST hour change did not happen on my flukso ,I got it to work eventually, connect via ethernet cable, log in , and save your sensor page for it to upload, worked for me.
edit... hmmmm worked ok on the log in page of the flukso but checked pvoutput.org and it was still wrong ...ahhhhhhg
For UK now need to change in settings to GMT+1 on pvoutpt site , now all working !. I hope this helps someone.
The FLM works with UTC as reference time. This means we do not have any issue with either timezones or DST.
Time zone can be changed on PvOutput.org.
Bazzle