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Last seen: Sep 17, 2026
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...
Subsequent to writing the above one more niggle occurred to me. Whilst you set up the upstairs you need to ensure that the heat pump isnt disabled be...
On the contrary you are asking all the right questions and providing well thought through answers. Its going to be difficult to give a 'prescription'...
@green_fox Excellent information and pictures and wow you have got a lot of kit. A couple of observations and then (sorry) a couple more question...
OK so all you actually need is a call for heat on/off, temperature measurement and remote access. Thus not necessarily a heat pump or even a heating ...
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Degrees of Separation
Latest Posts
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RE: Heat Pump deployment statistics: June 2026
To my eyes, sat behind all of this is a basic policy ma...
By Temperature_Gradient , 9 hours ago
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Thank you @majordennisbloodnok – that means a lot, part...
By Mars , 14 hours ago
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We’ve just passed 20 million forum views! 🎉
It's official. The Renewable Heating Hub forums have of...
By Mars , 14 hours ago
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RE: Missing flow temperature in Heat Geek proposal
That calculation is reasonable, output is proportional ...
By JamesPa , 16 hours ago
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RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
Have you looked at the Nibe website? They list their ap...
By Lizzie , 17 hours ago
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RE: Why are ASHP installs so expensive?
A not unreasonable position and it wouldn’t be mandator...
By AndrewJ , 17 hours ago
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RE: Who's your electricity provider and what's your tariff?
@batpred When the raw material input has increased in c...
By Papahuhu , 2 days ago
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We kept ours and Heat Geek would have been in touch if ...
By Batpred , 2 days ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@ian-s I would encourage you to have a conversation ...
By Rob of York , 3 days ago
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RE: Is it the house or the equipment?
Thanks @jamespa The last hard to fix draughts in the...
By springswood , 3 days ago
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RE: Vaillant Arotherm – Using Heating
@l8again Mine is typically using 11w including the i...
By Batpred , 3 days ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
If you have a flowmeter and two temperature probes, the...
By bobflux , 3 days ago
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RE: Siting of the external sensor on a heatpump
@jamespa Absolutely. Even if the same mistake was mad...
By Batpred , 3 days ago
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