Nice work, got it running! I don’t have all the feeds, so it’s not all showing as you have it of course. Here’s a heating run from yesterday with a nice efficiency of 433% just look at that stable run, no cycling at all 
It’s doing the DHW at the moment hence higher flow temp.
Im wondering if for the time being it would be better for you to keep this under your own repository, users can just drop it in to use it and you can keep pushing new developments as you work on them without having to wait for my review and pull request merges?
I’m planning on overhauling the heat pump monitoring documentation soon and I would be happy to feature this app as part of the documentation.
It might be worth adding installation instructions to your readme, in particular the installation path needing to be MyForest/mmspheatpump which tripped me up for a bit:
cd /var/www/emoncms/Modules/app/apps
mkdir MyForest
cd MyForest
git clone https://github.com/MyForest/mmspheatpump
I see that you have used a different naming convention to the ‘My Heatpump’ app. Would you object to changing the expected feeds to:
- heatpump_elec (electricity consumption in watts)
- heatpump_elec_kwh
- heatpump_heat (heat output in watts)
- heatpump_heat_kwh
- heatpump_flowT
- heatpump_returnT
Thanks again for sharing this and your wider experimentation, really interesting.