Biospace wrote: 26 Jun 2024, 10:10am
Cugel, you relentlessly mock others and their homes because they don’t follow your lead with renewable energy and insulation (although you appear to have a problem with excess heat), even when their CF sounds very small compared with most Brits.
Isn’t it satisfying to power the home into the night, using energy harvested yourself - we’ve done it for many years, but I don’t consider others to be engineering luddites if they don’t. Wouldn't it make sense to be certain of your own credentials before trying to ridicule other behaviour?
- Mocking “magic” shutters is something no-one with a basic grasp of RE and CF would do, they’d be shouting from the rooftops how daft people are to waste electricity pumping heat out of a room while the sun is fiercely heating it through unprotected windows.
- Similarly for lithium batteries. I can only guess that with such a large battery, you store electricity to power the heating and hot water. This is eco-madness, given the batteries have LCE of the order of 20x that of heat stores.
- You also mock old houses with high thermal mass, higher ceilings and sash windows, which work superbly to buffer the vagaries of our climate. We would be sitting in a cool 21C or 22C when the sun was bleaching the paving stones and air temperatures rose over 30C, yet cosy and warm in winter, given a modicum of understanding of the house’s thermal behaviour.
- A rudimentary understanding of carbon footprints would take every step to use solar power efficiently since the Grid makes up the shortfall - by burning gas, most of the time. You appear to only conceive of these things in monetary terms -
" It's the cost of use that matters. Aircon driven entirely by solar costs nothing to use"
Do you pay your neighbours gas bills and fill their cars with petrol? If so, I salute your splendid community spirit.

Yes, that has happened with electricity from our solar PVs, but of what relevance is this? It’s never occurred to me to mention it.
You've made it impossible to ignore your professed eco-awareness yet the reality falls short, even if your subsidies don't. For sure you don't travel far by car (does you family come to you?) and don't fly off twice a year, but plenty don’t.
Watching someone throw insults when they themselves have their facts confused was growing increasingly awkward.
When one is accused of being a money-grubbing fool for attempting to not only save money but be green in one's energy use, one tends to revert to replies that are equally disrespectful. But even though the rhetorical style can be rather jocular (for this is the intent of my light mocks - it's a Geordie thing) there is a fact-based discussion going on beneath those exchanges.
I can give you (and have done) hard data concerning the costs, productions, savings and "green" effects of our solar installation.
You in return have given me some theoretical stuff about shutters and Georgian building techniques that seem less than robust because there is little or no hard data, measured accurately and objectively. And your suggestions for cooling with these methods don't apply in any practical way to most British houses.
One other poster has made a case for shutters that includes some data of his own estimation - he does make a persuasive case - for those who can practically install shutters (very few) and can afford them. But what you yourself say on the matter often has the characteristic of hearsay or even myth.
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I find your accusations of somehow encouraging gas and oil burning by grid power sources bizarre. We produce an excess of around 1000 - 1500kwh per year from our solar panels over what we use. 4500 - 5000 kwh go to the grid each year, mostly in the longer days of the year; we download overnight into the batteries from the grid in some of the shorter days. Any way you look at it, we do our utmost to be a net and green producer of electricity, not a consumer.
It would be good if that downloaded grid electricity we store then use from the batteries in winter was all wind and solar produced by the grid-connected power stations. There's nothing I can personally do to bring that about. Your suggestion that I should not use the solar electricity we produce ourselves to run aircon because you have some hard & fast beliefs about shutters and Georgian houses (we don't live in one, by the way) seems rather peculiar, to put it nicely.
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I suppose that there's a lot of ideological posturing in even these matters. I'll certainly admit to following an ideology (if you can give it such a grand name) based on the notion that we shouldn't use tech that continuously produces very bad pollution and causes the climate to change in ways that will cause immense damages to not just we humans but the whole biosphere.
You seem to be stuck with an "ideology" that demands we all rebuild our houses like the Georgians and make sure we have shutters on the windows, to reduce modern aircon tech even though it would be "green" if driven by solar panels. Frankly, your attitude is more dogma than ideology.
Perhaps the cases can be reduced to this:
Ability (and cost) to rebuild one's house to have Georgian-style cooling
compared to
Ability (and cost) to install solar panels and an air source heat pump .
Which is going to prove the most practical, the least costly and the most effective?
“Practical men who believe themselves to be quite exempt from any intellectual influence are usually the slaves of some defunct economist”.
John Maynard Keynes