Last seen: Aug 15, 2025
@toodles - interestingly, that plot looks like a plotly/python plot, which is what I use. I don't normally include the top right icons, but I do inclu...
Method note (only of interest if you are interested in the code): I have sorted out the split regression line in the polynomial plot, using sort (sic)...
I absolutely agree - that is why the opening remarks in my very first original post in this thread, answering the question in the thread title, were ...
I think that if you look closely at the data you will find that that is the case. Defrosts indicated by the LWT dropping below the RWT:
I think the higher variation is probably due to the defrost cycles, the heat pump is literally blowing hot and cold, and the local OAT varies as a res...
It's certainly true that basic WC as used by most heat pumps is really only good enough for steady state operation with relatively slow over time chan...
And here is the version 3 (polynomial regression) code [edit 13 Jan 2024 10:00: now with sort added to remove split in regression line plot, and use f...
@jamespa - thanks for the kind words. I think I must be much more comfortable with 'making do with what we have' than those with backgrounds in the ...
I said when I first posted it and I have repeated it again, and will now repeat it for a third time, it is not meant to be an answer, let alone a defi...
@scrchngwsl - thanks very much for putting so much effort into this, and detailing your reasoning, and posting your code. I will post mine once I have...
Here's the data table from the actual chart: Don't forget I never claimed this chart was the answer to everything. In the paragraph immediately un...
Latest Posts
-
I should clarify that the FoxESS web interface is not l...
By Old_Scientist , 7 minutes ago
-
RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House
Previous was vented and I needed a shower pump and a ve...
By JamesPa , 41 minutes ago
-
RE: What crazy nonsense are inverter limits and why are they imposed?
I disagree. You don't even require G99 consent from y...
By Transparent , 1 hour ago
-
RE: Electricity price predictions
Actually there would be a good logical case for this. ...
By JamesPa , 1 hour ago
-
RE: Mitsu Wireless Controller and MelCloud
@robs Hi Rob, At the end of a note to Mitsu UK, thank...
By DavidAlgarve , 18 hours ago
-
RE: Why so many sigenergi installer recommendations?
@adamk Tesla is a great option, it’s also one we instal...
By SAEnergy , 1 day ago
-
RE: Rodents! A word of warning for heat pump owners
Hradline in Telegraph: Brace for plague of rats after s...
By Tim441 , 1 day ago
-
RE: Flexi-Orb Heat Pump Scheme: A Game-Changer for the UK's Heat Pump Industry
As a potential heat pump customer, it would be good to ...
By Temperature_Gradient , 2 days ago
-
RE: Octopus replacing the fixed 15p/kWh export rate with a market tracking one
@trbob I have just extracted the details for Agile Expo...
By Toodles , 2 days ago
-
RE: Heat Pump Books For Beginners – Bodge Buster & From Zero To Heat Pump Hero
The Ultimate Guide to Heat Pumps is less than a month a...
By Mars , 2 days ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
@editor Hi Mars, We have just installed a Grant Aerona...
By GrahamF , 3 days ago
-
RE: Sanity check please. Battery storage and inverter sizing.
There are MCS guidelines about how close to the edge/ri...
By Old_Scientist , 3 days ago
-
RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff
I estimated our usage on the following basis. The mos...
By Old_Scientist , 3 days ago
-
@editor Something changed in this last 12 months, they ...
By ASHP-BOBBA , 4 days ago
-
RE: Ecodan & MelCloud scheduling
I put the above question to Mitsu UK at the sme time as...
By DavidAlgarve , 4 days ago
-
Thanks for the heat geek info. I've fitted my own heat ...
By bontwoody , 5 days ago
-
RE: Does anyone have experience of a smart water meter?
Just to give a sense of scale, I've used the CCW water ...
By Majordennisbloodnok , 5 days ago
-
RE: Powerwall 3 or Myenergi or something else?
We have a Tesla Powerwall 3, recently installed, so I m...
By Old_Scientist , 6 days ago
-
RE: Mitsubishi PAR-WT60R-E Wireless Controller installation
@morgan They have been paired once but it was thought b...
By DavidAlgarve , 7 days ago
-
RE: Isolating the system for a planned power cut
A great many ground-mounted local substation transforme...
By Transparent , 7 days ago
