Hello,
reposting as maybe my comment was missed ^^
Where/how did you get this FW update? I wrote to Deye support and they said this:
"The firmware has been updated to the latest version"1144" for you, but this feature does not exist,Perhaps what you see (they mean this forum) is not our deye's inverter."
Then after asking details and pointing to this forum, they said:
"Our latest version of single-phase 6KW inverter is C367,His C369 version may be customized,He is a single-phase version and is not suitable for your three-phase inverter.Your inverter types currently does not have this feature, and I will notify you when it is available"
Mine is a 8k 3 phases Deye .