Hi Guys,
I find it absolutely awesome how HA is developing. Especially with the energy component now. Iād say I am an average user with limited coding experience and I tell myself that there are other things that I am good at 
With regard to Energy though I was wondering if it were possible for you to take a look at integrating IUNGO in to HA. I have been using that for many years and and has a lot of data stored locally. It would in my opinion be an excellent addition to HA because it also serves as a zwave bridge. I am sure that if energy is important, taking a look at this system will be well worth the effort.
full disclosure: I have NO connection to iungo other than that I own a setup of them.