I applied for it and it was trivial. The installers handled the whole thing and I just got more money plus a login to the website where the live info is available.
In fact it’s going so well I made this EmonCMS app to allow me to experiment with the heat pump because I could see so much data:
https://community.openenergymonitor.org/t/heat-pump-experimentation-app-release-news/
Feel free to ask any questions.