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Last seen: Jun 16, 2026
@toodles With a phase change material the point is that the building doesn't change temperature due to the phase change. Instead it sits stubbornly at...
Stratification and size changes too. Phase change materials tend to change size and thus need a rather more flexible containment. There has been a d...
That will be absolutely murdering your energy efficiency unless properly abated when not in use, and it also drives losses in places you don't expect ...
The cooling side works much better if you can figure out how to get the energy out. The amount of kWh involved in freezing or melting a cubic metre of...
For passivehaus btw you also need to consider just using an electric heater (or even a large dog) as at that level of efficiency it can be that you si...
Whats more relevant is that a badly installed air/air system has a COP of near 4. Given the kind of people who do a lot of installs this is a feature ...
Why get a battery pre-built ? 1. Because you need the tools and to know how to do it safely. Things like gloves, no jewellery etc, correct torquing ...
We already have a helium shortage so presumably they have to get this from "neat trick with helium" to product made with cheap gasses. Given how long ...
You can buy a pre-assembled 16kWh battery for about the same at this point and that's despite battery prices shooting up due to Trump (they were neare...
Not a chance given the likely next government. More likely they'd "cut" energy bills by arbitrarily revoking FIT and cancelling all feed in tariffs. A...
You can change a lot and keep a FIT but the whole thing can get to be a bit of a nightmare and will need an installer who knows the rules and likes fo...
I think the big question here will be your G100/G99. AC coupling means everything gets counted together. So 3kW of FIT, plus 3kW of AC coupled inverte...
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Degrees of Separation
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@transparent Contractors for elements, I like being han...
By chastity_outward053@simplelogi , 5 hours ago
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RE: Heat pump installation quotations
@majordennisbloodnok We have a sort of inflatable ru...
By Batpred , 7 hours ago
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RE: GivEnergy inverter tripping due to over-voltage?
The symptoms you describe can be accounted for by anoth...
By Transparent , 7 hours ago
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RE: Harvest Thermal - ASHP with a smart thermal battery
@etchedpixels My comment was in reply to @jamespa comme...
By Toodles , 13 hours ago
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RE: Heat pump done right first time? Installation in Kent.
Thank you for that, @wanttobegreen. Information like th...
By Majordennisbloodnok , 16 hours ago
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Floor standing brackets for K3 rads
My neighbour is a plumber and said I would need to fit ...
By Singlespeed , 1 day ago
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After an intense recode, I’m pleased to announce that w...
By Mars , 1 day ago
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Hopefully this will answer your question. To...
By ASHP-BOBBA , 1 day ago
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RE: Help me keep the faith with my air source heat pump installation
I would be interested to find out if others do this and...
By ASHP-BOBBA , 1 day ago
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Don't you dare. You just carry on as you are; as @batpr...
By Majordennisbloodnok , 1 day ago
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RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@ragtime27 some rooms in our house only have one place ...
By Judith , 1 day ago
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RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 2 days ago
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RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
By Transparent , 2 days ago
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