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Last seen: Nov 2, 2026
Very much agree with this! Sometimes the way to get things to operate in pure WC mode is to set the curve on the controller, then just turn all the ...
Thats sensible then Most heat pumps seem to limit adjustment of the WC settings to installer mode, although some do expose something to ...
Fair enough and Im not trying to circumvent regulation, I was just checking that I understood the underlying cause for your comment and that I hadn't ...
Assuming your house was heated previously your oil consumption indicates a loss of more like 4-7kW, so an 8kW unit would probably have been perfect as...
So thats a regulatory matter not technical? The Sunnyboy has no CT. If the CT for the battery inverter is on the incoming main then it does know th...
@transparent Thanks perhaps mine is G83, cant actually recall (I will check). Its a SunnyBoy SB4000 I have PV, Im considering a...
I think it is most unlikely indeed that it cant run on pure WC, there will almost definitely be a config/wiring option to disable room influence entir...
Firstly you need to recognise that December through February are very cold and so you will inevitably have MUCH higher bills in these months, probably...
@transparent thanks thats really helpful, particularly the diagrams. In the G100 case I presume that the inverter must be specifically G100 certified...
In this case you need to use average OAT and energy supplied to the house (as opposed to energy consumed) to do the calculation. You then get the los...
If you consume 10kWh in 3.5 hours at a COP of 2.5 then the 'calculated heat loss' is 10/3.5*2.5=7.1kW which quite plausible. However 3 Hours is pro...
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Degrees of Separation
Latest Posts
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RE: Boiler Upgrade Scheme funding reduced by circa £750 million in 2026 budget
More cross posting! I agree, the 'anticipated distress'...
By cathodeRay , 16 minutes ago
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There's some very useful technical points being made he...
By Transparent , 40 minutes ago
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RE: Adding data centre electricity costs to domestic energy bills?
Potentially the largest data centre hub in Europe and t...
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RE: Octopussy cosy 6 experience
At current oil prices I think you might be able to do a...
By JamesPa , 3 hours ago
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RE: Aerotherm and weather compensation
The principal cause of inefficiency if a heat pump is n...
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RE: Solar Power Output – Let’s Compare Generation Figures
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RE: DIY powerflushing tutorial
Interesting! I toyed with the idea too. But I installed...
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RE: 15kw pump for 225m2 1990's house - over kill?
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RE: Marvel Heating liquidation
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@etchedpixels Agreed, just a thought for others. I am...
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RE: Vaillant ecoTEC Plus - Flow Temp and Set Up
Heating been on for 4 weeks now, continuous. It's 6C o...
By trebor12345 , 3 days ago
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Coming back on subject... A shortened version of the ...
By Transparent , 3 days ago
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RE: Say hello and introduce yourself
Perhaps it is time for an update on ‘our’ project. We h...
By Toodles , 3 days ago
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RE: Free app: run the immersion / heat pump from Growatt battery & solar surplus – no Home Assistant
Please bear in mind, everyone, that in order to use thi...
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