SteamyTea

Probably, it was a number I remember for years ago. May be worth calling it 2 times now. I am lead to believe that was why the Sunamp was developed. It is a Scotch product and they have lots of low carbon energy, and domestic heat loads are the biggest in a house (up there, usually). So as a direct replacement for an E7 system, there are not so highly priced and offer some space saving and user benefits. Still way to expensive for a box of candles mind.

The trouble with batteries is that you have to oversize them. So if you want 1 kWh delivered, you probably have to buy in 3 kWh. This does depend on the load they are expected to deliver, the coulombs, as well as the chemistry and operating conditions.

I made one for a Solar Thermal system. Was a bit crude, just a 'relay as a switch' to sense when the pump was on and a couple of 1Wire temperature probes to sense the temperature differences. Then an assumption about the flow rate. Was wired into a Raspberry Pi ZeroW. It worked.

You have to use the Kelvin scale to get the true difference. To be honest, we should all use the Kelvin scale, for everything. Phase change thermal batteries are not cheap. I think in the order of things it is: PV (if used when generating) Water Storage Battery Storage PCM Storage This is more to do with the scale of production and the usefulness (entropy)

which will be the second S

Our chicken ends up on a plate, for between £3.50 and £12.

Will be interesting to see a years worth of data, nothing much matter this time of year when there is excess, excess. I was surprised how quick my E7 200 lt cylinder settled out, with the bottom being close to the supply temperature and the top pretty stable, even with usage during the day. Posted up the image on other threads of the temperatures.

Have you tried to compare the losses of the battery and water storage?

SSE are not a DNO as far as I know. They are only interested in the billing side really. You should be able to find out who your DNO is with a bit of googling. Ah, seems SSE are the DNO in Scotland,

What happens when a few people don' pay on time, or not at all?

Sounds like something is amiss.

You are trolling again.

So if, for easy of calculation, you loose 100kWh extra a year, and energy cost go bonkers to £1/kWh. Then in 30 years you will have saved £6k.

I have a cheap fitness tracker watch somewhere. That can take a signal from the phone. Can't you make up something like that, a band that vibrates when someone rings your bell, or at least vibrates your ring if you are worried about snagging your strap.

Depends on the area and how it affects the overall U-Value. While the differences look large on the face of it, the price difference does look very large. You can improve other areas to compensate i.e. extra wall insulation on a North wall, better airtightness, better heating system. Or just do a bit more shopping around.

Very rough calculation, with 3 ACH and an overall U-Value of 0.2 W/m².K, works out at about 0.1 kW/K. Assuming you can get 100W/m out of the skirting radiator, you should be able to keep the place stable until it is 10⁰C below the temp you normally turn the heating on. I usually turn my heating on when it is 10⁰C mean outside temperature. I have used 20 W/K for all the non air change loss, and 37 W/K @1 ACH for air loss. IF you have less losses, or the radiators emit more, then you can go lower. (But I have had a tough day and worked this out in my head as I sat in traffic, (expletive deleted)ing G7)

Still got some in my NE facing rear garden that are 34 years old.

No. IF/THEN

Buy a picture frame of me, glue one in place, then take it to an art show. At least I will get a tenner, plus package and postage.

A heat pipe is like a diode. Not sure what an inductive would be. Shall ponder that as I wander about. Basically something that can oscillate with minimum losses I think.

I think if you expand all the derived units you send up with the golden three if kg, m and s, in the same places. Newton's Law of Cooling is the same as discharging a capacitor. Population growth formula are the same as charging up a capacitor or battery. e = 1+1/1!+1/2!+1/3!+1/4!.... A harmonic series.

Best to, you don't want to get done for contamination. We all know what happened to Brian Aldridge and he was only just down the road from you.

Can GIMP or Inkscape convert PDFs to CAD formats. Not every looked, but they are free.

Not sure you should do either of them, not even sure if it is legal to do so, especially as you are so close to a waterway.

Here is the proper way to do it, not saying it is easier. https://en.wikipedia.org/wiki/Heat_equation Right at the start, when you right dT/dt are you really meaning a differential equation? If so, it should be δT/δt, and you would have to solve the first order differential equation and then substitute the number back in. Or divide a small change by another small change, which should be ΔT/Δt and this is an ordinary equation.