SteamyTea

And we don't know how long a photon lasts yet, at least 1 billion, billion years. And they have a mass of less than two-billionths of a billionth of a billionth of a billionth of a billionth of a billionth of a kilogram.

Was part of the point he was making. But that was about javascript. But I notice here that IE11 is 4th from bottom. https://html5test.com/results/desktop.html

Here is a quick 'time to heat' page https://steamytea.wixsite.com/timetoheat

My initial suggestion was that we had a few on-line calculators that would save time by not having to repeat ourselves too often. And have them in an easy to get at place. IE is an old browser. There comes a point where old standards should not be supported. I am not a 'coder' at all, and have little interest in doing it, but know that others are. But one thing I do know is that by keeping things very simple, they tend to be reliable. So adding in too much to one small bit of code can cause problems.

Why I suggested some online calculators on the site

Is that someone that does painting for a living (possible not for long). If so, then they should know better.

Well not that hard really, just wish I had better eyesight and I would spot the mistakes. Now let us see if I have managed to load it to 'somewhere' and it works. https://steamytea.wixsite.com/watercalculator

I initially thought of that, but then it is best to discourage random downloads. I am just playing with a bit of HTML5 output code that seems to 'do sums'. Got the input side sorted, just struggling to get the output showing, probably as simple as a ; instead of a :

Can't you just have a default message to say, "Update your browser dickhead" Is there any non javascript way to do it? I know next to nothing about coding, it is all a bit messy to me. But the arithmetic behind it is simple enough.

The trouble with external links is that they don't drive traffic here particular, more drive it away. How much maintenance is there really? These would be simple calculators i.e enter volume, power and get out energy and time, maybe an extra to add in kWh price.

Would the capital costs and service of an LPG system not be greater than the imported power of an electrical system?

After the silly mistake I made working out the energy needed to heat some water (it was late and I had just finished work), I got to thinking about how hard would it be to add a few calculators onto this site. I had a quick look around and there seems to me dozens of example about using javascript to process 'stuff'. But to be honest, it is all Greek to me. So two birds could be killed with one stone. Calculators to work out frequently asked questions and an easy to follow tutorial about how they are made and integrated into webpages. What do people think?

Is there any reason why you cant put a small immersion heater in a buffer tank?

As an example, during the summer, I use 3 to 4 kWh/day (excluding washing days, which adds another 1.5 kWh). Now I have relatively high base load as there is only me in the house. You could try and work out your DHW usage, it is not hard, just tedious to do.

I was in PZ earlier and found a bit of Ian's welding for sale. £2500 it was.

may be worth someone that is living in a caravan on site to try it out.

Is this garden room affected by building control, if not, why not just make a GRP roof with a few timbers in it as mounting points for the PV?

A quick look at PVGIS shows that for a 1 kWp, south facing, system in Milton Keynes, there is only 3.4 kWh/year difference (73.7 kWh/year @17°, 77.1 kWh/year @40°). So really just random variation and statistically insignificant.

Yes, it was late. So 16 kWh times 6.7p/kWh is £1.1 I agree, why annoys me about quoting efficiency sometimes. Once you add in all the losses the figures often look dreadful. Just easier to remember 3 zeros after the decimal point and then a 3. But when put into its mechanical equivalent it is only a tiny difference and probably lost in 'noise'.

I wear cheap Dunlop steel toes trainers at work, last about 6 months, but they are only 22 quid. Grip well on a wet floor though. Steel toe caps are useful as I work with a clumsy, messy, ginger, inbred, Cornish oaf. Walking is different matter, just bought a pair of boots at the Millets sale, Peter Storm ones they have StormGrip soles that seem to fit me better than most.

I would have PV if it was free You can check PVGIS for estimated yield from a system http://re.jrc.ec.europa.eu/pvgis/apps4/pvest.php# That will give you an idea of what can be generated, but yet again, is only part of the story as it relies on mean kWhs and not instantaneous power (watts). Actually, just had a look at PVGIS and it does now do estimated mean power.

Really depends on how much DHW you actually use. And for bathing, anything below about 30°C is useless.

1 lt of water takes 4.2 kJ of energy to increase by 1°C. 1 kJ = 0.0003 kWh (near enough). So to raise 250 lt of water from 10°C to 65°C will require: 250 [lt] x (65 - 10) [°C] x 0.0003 [kWh] 4.125 kWh The boiler has an efficiency of 90% (near enough) 4.125 kWh x (1/0.90) = 4.58 kWh (LPG needed) The cost of LPG 48p/lt There is 7.1 kWh of energy per litre of LPG, which works out at 6.7p/kWh (cheaper than E7) So cost is 4.6 [kWh] x 6.7 [p] = 31p (near enough). I often make mistakes in my arithmetic (statistics is so much better), but someone will be along to correct me I am sure. This is only a very small part of the calculation. You then have to take into account the real life performance of the boiler i.e. it is starting from cold and may only be running at peak performance for a short while. Then there are the thermal losses from the 250 lt cylinder, over a day these may easily be 50% of the stored energy. Then there is the maintenance costs of a gas boiler, and for that matter a solar thermal system. And this is before looking at the volatile price of LPG and any fixed costs for the storage tank. The main question you need to ask yourself is what you are trying to achieve?

Your a sick man Ian, well done