Heat pump api

[andrewellis]

Hi
I have a NIBE heat pump and although I can access limited data online I have to pay £40 a year for the option to get access to more data and control it through the cloud.  This has proven to be unreliable for access over the year.  The Nibe has a modbus option that costs over £600?!?!?

I was wondering what options people have for interfacing with their other brands of heat pumps.  Are there local apis that can be accessed without having to go through a cloud? Do they cost money? Are there phone apps to control the heat pumps without paying loads of money.

Thanks
Andy

[pdf27]

I've not actually done this, but in theory you should be able to do quite a lot with Open Energy Monitor. Details at https://openenergymonitor.org - to me this looks cheaper and better than many of the manufacturer options. For an air-source pump it should be feasible to tie the data to external temperature and humidity to give a much better understanding of the real COP, and potentially also use the unit for some basic smart grid functionality (using electricity when you're exporting PV, etc.).

[andrewellis]

Thanks.  I've actually got my own program logging all the data but I'm curious if other manufacturers have more direct means of accessing the data locally so I can approach NIBE and say they should probably look to do the same.  The pv inverter world seems to have many ways of getting data from the inverter.  Either through the cloud or locally via a variety of means (modbus, apis over ethernet).  All free.  NIBE seem to want to charge a lot of money for access to any data which doesn't seem right.  For me the problem is interfacing with the heat pump without going out to a cloud server.  I am aiming to do what you say re smart grid functionality but really need real time access to the information.