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Last seen: Sep 28, 2026
@papahuhu I was just checking the Cosy Fixed rates again in my area, and note they have increased 1.75% since I switched one and a half weeks ago, so ...
I find my 13.5kWh is perfectly sized for our heat pump. On Cosy, there are 8h of cheap rate, split over 2x3h slots and one 2h slot. With a 5kW inverte...
Are you saying that your DNO has restricted the maximum inverter rating to 2.5kW, or that is the hardware limitation of your battery system? I can ...
Have you considered adding a battery? Like others suggest, I would try Octopus Cosy for the first winter to get a baseline for your usage and avera...
I have one of these fitted which also allows you to regulate the flow should you need finer control, although I just leave mine fully open and turn th...
As a single point of reference, we had all 12 radiators replaced during our ECO4 install with larger K2 Stelrad types. Out of interest I costed the ra...
And even more so for the ~1 million households in England and Wales on heating oil which is currently priced at around 12.2p/kWh here. An oil boiler o...
Indeed. My installers were old school plumbers with flux, solder and blow torches. I guess the point I was trying to make was that I was surprised b...
Playing devil's advocate for a moment. After the major items have been listed - the ASHP, DHW tank and radiators (all of which were multi £thousand ...
The ‘Warm Homes Plan’ was subsequently published in January 2026, which included details of the government’s aim to achieve 450,000 heat pump installa...
My guess is that if you do nothing, Octopus will continue to pay you at the Flux export rates (for now). My concern would be that at some point down...
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Degrees of Separation
Latest Posts
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RE: Getting closer to a finished Haier system
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By Singlespeed , 1 hour ago
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RE: battery storage without solar
Allow me to clarify this for the benefit of @mrkfm F...
By Transparent , 2 hours ago
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RE: Tesla Powerwall (2) Calibration Cycles
Nope, it’s an Imperial/Cambridge start up, some fancy n...
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RE: Solar Power Output – Let’s Compare Generation Figures
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RE: Solis inverters S6-EH1P: pros and cons and battery options
I had a battery and inverter installed a while ago, my ...
By Batpred , 9 hours ago
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RE: Is This Initial Free Quote From Octopus Trusted Partner Reasonable?
@ltron2 The EPC on our house is A-92, however that i...
By Rob of York , 10 hours ago
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RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage
One thing a spreadsheet based heat loss calculator can ...
By cathodeRay , 14 hours ago
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RE: Heat pump branding. Clever, contemporary… or a bit too much?
The layout is confusing - much better like this: We b...
By downfield , 1 day ago
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RE: Is it just me, or does tradesperson timekeeping and communication drive you absolutely mad?
My experience, backed up by opinions from various frien...
By Majordennisbloodnok , 1 day ago
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RE: Analysis of the economics of switching to an A2W ASHP compared to other heat sources
I had a meeting today with a company based out of Swede...
By Mars , 2 days ago
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RE: Review your electricity provider
We were with Octopus in our old house and it was fault...
By ian33a , 2 days ago
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RE: Estimating true heat loss from twelve months of consumption data
I did, indeed, go with the 12 KW Vaillant unit.  ...
By ian33a , 2 days ago
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RE: Say hello and introduce yourself
@olivierm welcome to the forums and finding the right i...
By Mars , 3 days ago
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My fifth heat pump book, Heat Pumps Explained, is out n...
By Mars , 4 days ago
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