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Air Source Heat Pumps (ASHPs)
Last Post by Sheriff Fatman 9 minutes ago
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 DavidAlgarve
(@davidalgarve)
Honorable Member Member
Joined: 2 years ago
Posts: 166
Topic starter 28/11/2025 12:39 pm  

Has anyone else had a problem with Havenwise "learning" when using the Mitsubishi PAR-WT 50/60 Wireless Controller for data collection.

I am not having much success and I am being encouraged to change to a Shelly H & T, but I am not inclined to do that considering the time, effort and cash getting the PAR-WT 60 installed.

For many hours the target temperature has been set at 23C with the PAR 60 reading 20C and the heat pump is hardly working .

IMG DDDC7B1AF85F 1

(My normal choice would be a target of 21-22C and I have only increased it to 23C to see if it made any difference)  

Why is the heat pump not being asked to do more to try to achieve the target?

It all worked well last year on Weather Compensation.    



   
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 Sheriff Fatman
(@sheriff-fatman)
Estimable Member Member
Joined: 7 months ago
Posts: 91
28/11/2025 12:58 pm  

I'm not sure why the specific hardware would be deemed to be making any difference to what Havenwise is doing, or learning, from your system as it takes all the data from MELCloud, which would presumably still come from the the 'white box of tricks' that controls this.  For clarity, who is encouraging the switch to a Shelley device?  If it's not someone from Havenwise then I don't think it will make any difference.

In terms of what Havenwise is doing, I've posted elsewhere that in milder temperatures it controls the system by sitting idle for long periods and providing higher intensity 'blasts' of heat than a typical low and slow constant process, and I would imagine that this is what you're experiencing within the data.  I don't know if one is more effective than the other, but you have the advantage of having a prior heating season done using weather compensation, whereas I switched Havenwise on from day 1 on my system, so you'll at least have a basis for comparison between the two.


130m2 4 bed detached house in West Yorkshire
10kW Mitsubishi Ecodan R290 Heat Pump - Installed June 2025, currently running via Havenwise.
6.3kWp PV, 5kW Sunsynk Inverter, 3 x 5.3kWh Sunsynk Batteries
MyEnergi Zappi Charger for 1 EV (Ioniq5) and 1 PHEV (Outlander)


   
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