Wow, an answer from the man himself 
Thank you.
This is great news.
I don’t need anything special other than the ‘write parts’ to set the charging mode.
I only discovered that the six CT readings are numbered the wrong way around; as in from 6 to 1 instead of 1 to 6. See [myenergi] MyEnergi Binding - #9 by Max_G
Happy to test if required.
And am also happy to part with the money I had in mind as a bounty or buy coffee or whatever makes you happy (or is useful / appropriate).
Thank you all for chipping in some ideas how it all works, as I didn’t know that either. 
And a reply from BountySource just popped in:
Hi Max,
Thank you for reaching out!
You can create an account in the meantime with Github!
Best regards,
Team Support