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Last seen: May 6, 2026
@pirate-rich Keen to hear a bit more about the erroneous COP figures. I assume you mean the stated heat outputs are wrong. The electricity delivered s...
@jamespa The mechanical engineer in me wants to attempt to answer. But after decades in finance and management consulting, unfortunately I am incapabl...
@jamespa This is a 4 port buffer tank.
When I asked during the design phase, I was told this is to do with defrost cycles. We have achieved a good SCOP so far and are very happy with the pe...
@bontwoody Maybe one for @editor to consider whether a second hand battery shop on the forum might be worth it! Jokes apart, totally with you on the...
@bontwoody Totally agree. Even without a heat pump, if a 5 kWh battery helps storing the PV power generated during the daytime in spring, summer and a...
For our set-up, Octopus GO has been the best option from March to October. But, from November to February, Cosy is likely to be the better option, as ...
@old_scientist Cosy is a really good tariff for heat pump owners. The ability to run hot water during the 1 pm.to 4 pm period when the outdoor tempera...
@old_scientist With a 7.2 kWp south facing array, you should be generating enough during winter months as well. I am definitely jealous as our winter ...
Watching Gary Does Solar’s latest YouTube video on the future of export tariffs got me thinking about how I would adapt if Octopus were to drop the ex...
@toodles Few days in the year when I wish we had gone for an A2A heat pump than the current A2W system!
@toodles I have noticed that on some.days it takes a while to update the costs on the Octopus energy usage page or in the app. If not, I would be keen...
Latest Posts
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RE: Lower electric tariffs for heat pump users
@richard24738 Indeed, Cosy tariff wouldn’t work very we...
By Toodles , 4 minutes ago
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RE: ASHP Capacity loss with aging
@editor Just a thought really but, if the heat pump is ...
By Toodles , 39 minutes ago
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RE: Daikin Altherma 3 with Fan Coils in Puglia (Italy)… Sanity Check on System Operation
Hi Mars,Thank you so much for your response,I really ap...
By Simon_JM , 6 hours ago
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RE: Loud noises in the night - and one for the toolbox?
Brilliant bit of lateral thinking, and a useful one to ...
By Mars , 15 hours ago
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RE: Setback savings - fact or fiction?
Yes, also the higher OAT end is possibly a smidge high ...
By RobS , 15 hours ago
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RE: UK warm homes plan - how can it be delivered?
@bobflux My view is that regulation for consumer pro...
By Batpred , 17 hours ago
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Hi Mars, I've sent you a request to connect me with a...
By sttpd1917 , 18 hours ago
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RE: Sizing an ASHP; Heat loss and kW
Annual consumption is almost certainly better than an E...
By JamesPa , 22 hours ago
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Grant Aerona R290 (15.5kW) - How is DHW Target Temp calculated?
Hello all, We have just had a Grant Aerona R290 insta...
By TaffontheTaff , 23 hours ago
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RE: Advice on Vaillant Sensocomfort
The latest Vaillant announcement I saw said that they w...
By JamesPa , 1 day ago
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RE: Debugging my legionella immersion heater
I notice this (66 is rather hot) with my legionella cyc...
By JamesPa , 2 days ago
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RE: DIY Heat Pump Installations: Navigating Legal and Regulatory Hurdles
@transparent I thought you would spot that wind turbine...
By Batpred , 2 days ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@swwils there is no logic to oversizing a heat pump. It...
By AgentGeorge , 2 days ago
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RE: Vaillant Sensocomfort Time
Thank youy for the pointer. I think I have managed to ...
By ispookie666 , 3 days ago
