Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
Daikin COP / energy...
 
Notifications
Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Daikin COP / energy used measurement from MMI

 
Page 2 / 2
Air Source Heat Pumps (ASHPs)
Last Post by Anonymous 3 years ago
18 Posts
6 Users
2 Reactions
13.3 K Views
RSS
 Anonymous 5546
(@Anonymous 5546)
Joined: 3 years ago
Posts: 19
Topic starter 08/04/2024 7:06 pm  

@crasher sorry, I missed your message. 

I haven’t found a fix for this. I mentioned it to Octopus and a Daikin engineer when they visited and they were not very interested, stating that it was only approximate anyway. 

So I setup ESPAltherma and have had it running for 3 months with Home Assistant:

https://raomin.github.io/ESPAltherma/

It is excellent and provides great insight into what your Daikin is doing. 



   
ReplyQuote
 Anonymous 5546
(@Anonymous 5546)
Joined: 3 years ago
Posts: 19
Topic starter 08/04/2024 7:08 pm  

@hcas I’ve got the Daikin integration for Home Assistant; it seems to show the same (bad) electricity data as the MMI 😔 



   
ReplyQuote
 Crasher
(@crasher)
Active Member Member
Joined: 3 years ago
Posts: 7
08/04/2024 7:42 pm  

@squarepeg77 Thanks for the reply. I never got an answer either but it just resolved itself, checked it a few days after posting here and all was good again I had readings back! I don't believe it to be 100% accurate but it gives a guide to how the unit performs. I've found the same with Daikin, they never seem overly interested in providing any help



   
ReplyQuote
 HCas
(@hcas)
Estimable Member Member
Joined: 3 years ago
Posts: 132
08/04/2024 7:53 pm  

@squarepeg77 Hi! Is it your ESPAltherma that is connected to Home Assistant? Or are you using the Onecta API for the Home Assistant?
And the ESPAltherma gives you the same wrong readings as the Onecta app and MMI?

Have you set up any home automation or smart steering of your heat pump?


CEO and co-founder at HavenWise


   
ReplyQuote
 Anonymous 5546
(@Anonymous 5546)
Joined: 3 years ago
Posts: 19
Topic starter 08/04/2024 8:36 pm  

Both ESPAltherma and Daikin integration connect to Home Assistant. 

The Daikin integration exposes sensors that match the ONECTA app or MMI; so for me that means incorrect electricity consumption.

ESPaltherma is much lower level, but the electricity (voltage and current) sensors are considered inaccurate, so people seem to be using external monitoring. I’ve got a CT clamp around the heat pump feed that goes back to an Eddi, then I collect the data in HA. 

If you want to get going with ESPAltherma, there’s an excellent guide here:

https://community.openenergymonitor.org/t/daikin-altherma-espaltherma-home-assistant-with-openenergymonitor/25057/6



   
👍
1
ReplyQuote
 Anonymous 5546
(@Anonymous 5546)
Joined: 3 years ago
Posts: 19
Topic starter 08/04/2024 8:37 pm  

And yes, I am running a software thermostat in Home Assistant as the Madoka is too “quirky” for my liking. 



   
👍
1
ReplyQuote
Page 2 / 2
Forum Jump:
  Previous Topic
Next Topic  
Related Topics
Topic Tags:  Daikin Altherma ASHP (10) , daikin (12) ,

Currently viewing this topic 1 guest.

Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

Click to access the login or register cheese
Protected By
Shield Security PRO