[rigmarole]

This might be an old issue, but try turning of the hard drive space indicator in iStats Menu. It was a major drain for me a couple years ago. After a restart, energy use went way down.

[spockz]

Thank you. As part of the analysis I stopped istats completely as it was one of the main consumers of power.

But I think it must still be something else as it also consumes power in sleep. And I have disabled function to wake up and check mail.