Daikin COP / energy used measurement from MMI
@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.
@hcas I’ve got the Daikin integration for Home Assistant; it seems to show the same (bad) electricity data as the MMI 😔
@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
@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
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:
And yes, I am running a software thermostat in Home Assistant as the Madoka is too “quirky” for my liking.
-
Oversized Daikin 9kw
3 days ago
-
Daikin Octopus installation update - I saw my first defrost. 😍😂
3 months ago
-
Daikin Error Code 7H05
5 months ago
-
British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?
6 months ago
-
Do I need a bigger volumizer: 8kW Daikin Altherma R32 LT split
1 year ago
- 22 Forums
- 2,037 Topics
- 44.4 K Posts
- 36 Online
- 3,250 Members
Join Us!
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: The Rise and Fall of Europe’s Most Generous Green Subsidy
This is where the cold water storage tank was situated;...
By Dwynwen , 5 hours ago
-
RE: Help with understanding my Mitsubishi Ecodan air source heat pump
@majordennisbloodnok, the same thought occurred to me, ...
By Morgan , 6 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
I agree with @mars. My install was not dissimilar. ...
By JamesPa , 6 hours ago
-
RE: Air Source Heat Pump - Side Alley Suitability
Thats probably fair enough. The degree-days calculatio...
By JamesPa , 6 hours ago
-
RE: ASHP Ecodan L9 error - No Heating but Hot Water
That’s interesting, but obviously concerning also…. Do ...
By SUNandAIR , 22 hours ago
-
RE: In the middle of an ASHP installation - a few questions (and issues)
Thank you @robs - that very useful data. The issue wa...
By Transparent , 1 day ago
-
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's
@trebor12345 The Auto function is supposed to adapt au...
By Heatgeek , 2 days ago
-
RE: The Great British Heat Pump Quiz
@allyfish thanks for the feedback and glad it was fun! ...
By Mars , 2 days ago
-
RE: help sizing rads based on room by room heat loss
If its 1988W at DT 50, which is how most radiators are ...
By JamesPa , 2 days ago
-
RE: Career change – entering the world of heating and heat pumps
@editor Mars, thank you. That's along the routes I was ...
By Lakey , 2 days ago
-
@editor thanks Mars, it's a rare occasion I'm looking f...
By big_si , 3 days ago
-
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW
@ashp-bobba and @jamespa - thank you both for all your ...
By CBrenewable , 3 days ago
-
-
Win one of five "Heat Pumps 101" Courses
Heat pumps are gaining traction in the UK, but between ...
By Mars , 3 days ago
-
RE: Agile: average import cost vs other tariffs?
@toodles thanks for the analysis. I'll be really intere...
By Old_Scientist , 4 days ago
-
RE: Is this normal? Click of the DHW returning to space heating
@grantmethestrength Oh sorry to hear that, there should...
By ASHP-BOBBA , 4 days ago
-
@ashp-bobba TBH the ladies are rather disorganised, so ...
By Cathyem1 , 4 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
And for those of us without an automatic irrigation sys...
By Majordennisbloodnok , 4 days ago
-
Logically, the lower frequency = more gentle, yes, but ...
By SUNandAIR , 4 days ago