greetings I’ve reached here following a search and deep link through Google.
I have an octopus installed Daikin air source heat pump 4 kW unit and radiator emitters…
I’m a software developer so understand various technical concepts
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but can I ask what is this site,? what is the hardware and software you’re using? is there an overview page?
This is OpenEnergyMonitor - the clue is in the name. We are a disparate group of individuals who collectively have a tremendous wealth of experience in engineering and allied fields, and apply this to open-source projects primarily to monitor energy use - largely electrical but other sources also. At present, the interest and emphasis is on heat pumps.
If you scroll to the very top of this page, ‘Home’ is the place to start, ‘Docs’ is where all the technical information is, and ‘Shop’ is where you can purchase in-house designed apparatus. You’re presently in ‘Community’.
well thank you for that so I did scroll up and looked at the home page, the system overview, and the various case studies and the hardware I haven’t got a clue what any of it’s talking about so is there a guide to the guide or is it a case that I’m not intelligent enough to be on this forum.
I’m a software engineer not a hardware engineer I’m not a heat engineer but I’m very deft at web design web applications mobile application real-time applications avionics flight critical software 
I’m not sure what the answer is, or even if there is one. I’m not aware of any other “starters” guide. For the sort of things that members of this forum participate in, it’s very useful to have at least a basic understanding of both the hardware and the software involved, simply because what in your experience would be a relatively small software application is a significant learning experience for a dedicated but amateur DIYer who enjoys assembling the hardware components and getting them to work together. What I do take issue with is “I’m not intelligent enough to be on this forum” - proof that this is utter rubbish is your skills in “real-time applications avionics flight critical software” in particular. There’s a world of difference between a lack of intelligence and not having yet learned something, I like to think that this forum is a good place to change the second part, as we see demonstrated time and time again when a collective effort enables people to learn how things they didn’t understand work and solves their problems.
Do you want to learn about your heat pump, do you want to learn how to operate it more efficiently? If the answer to one or both is yes, then it’s time to start the climb up the learning curve. I warn you, it will be steep but it gets easier.
Welcome @DrConradInTheHouse
Quite a few others here with Octopus installed Daikin’s, how are you finding yours!?
Interesting to share experiences.
Is yours a new purpose built or retrofit?
Early days for us, 8kW with Underfloor Heating emitters and one Rad (that room will get UFH treatment this summer)…
Every install is different, we then look to customise these monoblocks through settings and timings to suit our homes and preferences.
So far it’s more comfortable even heating than the boiler ever gave and costs seem similar or lower - latest tunings are giving us better COP (I’m only working off the Daikin data from the MMI and smart meter monitoring).
Thank you for that insightful response yes I would like to learn but perhaps not to the level of you guys It’s interesting but it’s not something I feel I want to gain competency to a kind of academic or physical maintainer level probably where you guys are at. there is certainly scope to learn something so thank you I’ll stick around and maybe read more posts before I post 
for those seeking my views and experience here goes…
The system is a EDLA04E2V3 Atherma 4KW. I live in a three bedroom bungalow, NW England, built 1949. Part open plan with eight radiators . all radiators were replaced by Octopus to meet design spec. hot water cylinder tank was installed in the loft. installation was completed March 2024.
I had octopus back probably around September October when I started feeling cold the main issue was that there were perioda of the day … and it was usually the same periods … where it will go too hot and then too cold . felt like the system was off for an hour , three times a day. about 8 engineers come in , each one adjusted settings to different values then their colleagues. Then they gave up.
I then started reading and learning and decided that I would remove the thermostat influence and run purely off the heat curve adjusting and tuning settings over a period of several days and weeks.
where I am now is that aWD curve is set for OAT from -5 to 20C . The system runs 24/7 now but at a much reduced LWT than previously. The system no longer modulates and cycles and the unit runs 24/7 with lower temperature so less wear and tear and maintenance needed probably.
I use homeassistant to monitor the kilowatt hour usage and I brought the usage down from around 28kwh to 18kwh with OAT at zero C. So around 50% improvement naturally my monthly electricity billing payments have halved, there are no dead spots in the day, The house is more comfortable, And it doesn’t take FOUR hours in the morning to get from nighttime backstop to “normal daytime temperature”
The major takeaway for me is that octopus do not install these systems for maximum efficiency there seems to be a common design setting and customers are left with that. In my case the system was under thermostat influence the monoblock would cycle and modulate regularly, I generally was not the best way to run a pump. Additionally there’s very little competence in the engineers to understand the entire scope, dynamics of the house and the system, and to commission it accordingly for maximum efficiency. nevertheless they are polite and Octopus send out engineers in a very quick time but they just don’t have the full knowledge and training in my experience to individually customise individual customers installs. I suppose that’s a commercial decision.
I would advocate an air source heat pumps over gas boilers anytime
Set correctly for maximum efficiency and 24/7 runtime with lower LWT , tune to the ambient temperature and thermal dynamics of the property, homes can be made toasty comfortable everyday every year for far less operating cost than a gas boiler system would cost. conversely left at installation settings energy consumption is on par and can be even greater than a gas boiler and with perhaps not ideal room heating.
So I’m very happy but I had to put a lot of time and effort in tuning the weather curve over a period of days and weeks during which the house was very cold or very hot but now as I say it’s perfect. What I should have done earlier which I’ve done now is create a spreadsheet with all the values which shows tabular data and plots the WD curve lines, for the difference between the current setting and proposed new settings This allows me to fine tune for ranges of OAT and visualise the impact of tweaking X1 X2 Y1 Y2.
hope this helps
This may help? - Daikin Altherma, ESPAltherma & Home Assistant with OpenEnergyMonitor
most kind of you but I have a contract with octopus to maintain the system for 5 years so I’m not going to start opening the monoblock and connecting devices to it I’ll just leave that risky and warranty voiding task. I am not a hardware engineer or heating engineer furthermore any damage I cause to the property would also void my home insurance.
But thanks.
I just run the standard home assistant with an Onecta cloud integration. It does what I need.