SteamyTea

A well managed battery system does two things. Stores energy that would have been exported Supplies usable power Ideally you want to se all generation directly as the losses are the least. If you feel you must store energy, then a battery system needs to be able to power what you need it to i.e. a full washing machine cycle. If you only export, over a year, say 15% of your total generation, then it is not worth storing as the combined system losses will be greater.

Some say, when I moved, the IQ doubled in both places.

This one left decades ago.

2 or 3 other BuildHubbers are out that way.

Very nice, is DLT a neighbour (he may have moved since is career was wrecked with false allogations).

Welcome. Which part of Bucks are you in. Your daughter could demolish most of Aylesbury's council buildings and everyone would be happy.

The y-axis scales to the energy used, so in your three charts above, the scale is different (0 to 0.3, o to 0.8 and 0 to 1) The x-axis is the time series, and seem each column is half hour energy usage. The two lower charts show similar usage patterns (20-7 and 26-7), the top one shows a different usage pattern, but at lower energy usage i.e. max usage is around 0.25 kWh in 30 minutes. The others peak at 0.65 and 0.8 kWh for a 30 minute block. Power is energy divided by time. Energy is power times time.

What is needed is a standard that incorporates the existing standards. Or in other words, an extra standard.

Refrigerant gas compressors, the major component of a heat pump, probably are made in larger numbers than gas boilers. Both our main cars have them, though mine does make some strange noises sometimes.

Artisan cheese is often made with grubs.

With regards to cost, surely we need to look at the unit energy prices. My fridge takes, on average, about 12 W, so 105 kWh a year. The temp difference is about 15K. Surface area about 2.5 m². So each m² is allowing 42 kWh/m² though. At a cost of £100, and so far 6 years trouble free service, that is £6.66/m². Now my house with a wall of U-Value 1.5, and the same ∆T of 15 K, takes about 2 MWh of energy to heat a year, so spreading that over the whole year, and the 100 m² of heat loss area. That works out at 20 kWh/m². So roughly half the performance of my fridge needed. So the price for an ASHP should be somewhere around £3.33/m². £2000 for the unit only, if it lasts 6 years. Seems the price is comparable. (I am sitting in a cafe, so my numbers may be bollocks, lots of 'summer distractions')

Is that because the grub screws on both handles are not tightened down to the shaft?

You need some blocking diodes. Everything s put right with a pocket full of diodes.

Not going to happen it its current form. I can see no justification of having only 200 m between the walls, why not a 1000, 5000?

Because it is on one of the worlds largest oil producing countries.

Yes, and not one of them will shit on my car.

There was a question?

Does have only half the population density of London, which is a low density city. Good place to go if you are a window cleaner.

How do PV sales people describe how they work. Do they say they create a black hole.

Or PV/T = C Where: P = Pressure V = Volume T = Temperature C = Is Constant Or, a picture

"All models are wrong, some models are useful". Time for this, again.

Just checked my account, seems I am £0.75p in credit. No sign of 400 quid in my account, but new bill is due end of August.

That would be a cooker.

That will be 0.021 Wh then. 0.5 kWh a day. So somewhere between 3.5p and 17p per day. Or £13 to £62 a year.

I did from my big standard 1987 era E7 200lt cylinder. About 20p a day when heated to 65⁰C. Lot less now it is at 45⁰Cish, and I use most of it just after it has reached max T.