SteamyTea

And more. W/m².K. The K becomes important with older buildings, so to keep the W at a sensible level, a lower ∆K is wanted. Only real choice is thicker insulation.

I have recycled my old, rotten red door, to a blue one. More paint in the morning, and hopefully the drip bar will turn up. Still needs a bit of threshold work, but it closes properly now. Only taken me 15 years.

That's where you are going wrong.

As you have a bit of land, have you thought of offering to rent to to a Telco. They can put a 5G mast on it. That way you get FTTP and a strong 5G signal.

5p/kWh isn't it. That makes it 11p/kWh. Not sure if you can get MCS fitted PV for £750/kWp at the moment, but self installed is a possibility. In a new build, with a suitable roof, well worth it.

I should have added that is peak power, not peak generation. Dare I mention kW (power) and kWh (energy, or in this case generation).

Is it just the temperature, it could be the altitude and azimuth of the sun. There is also turbidity in the atmosphere. Often the reason the modules seem to perform better in the spring and autumn is not temperature, just the altitude of the sun is the same as the roof pitch at noon.

Probably not. You have to look at the raised temperature in conjunction with the extra radition that they are getting. We tend not to get exessive temperatures without excessive radiation in the UK (thare are odd exceptions where a wind blows over a mountain and, as it falls to Earth, compresses the air and heats it up). So if a module is tested a 20% converstion efficency, at 25°C anC d at 800 W/m2, and for every 1°C above that it looses 0.5%, at 35,you get 138 W/m2 of electricity. If you tested it at 35°C, but at 1000 W/m2, you get 171 W/m2 out. (not exact figures, but highlights how the 'efficiency' is measured) The other thing is that during those fairly rare high temperature events, you don't need much electricity.

Be interesting to know what the temperate differene is between PVed and unPVed roofs. Maybe a project for when you get it fitted as I am ausre there will be a bit that is not covered.

I still don't understand why we don't fit small wifi reperaters to all cars. Most of us are never far from a car. Then with some software trickery, hotspot to our phones and share a little bit of bandwidth. OK, people in remote rural areas won't get much service, but if you move to an isolated area, you will know this in advance. Bit about wifi here. https://www.bbc.co.uk/programmes/m0014pgk

Spray can of matt black and it soon will be. I have often thought that it woud be worth fitting UFH, with aluminium spreader plates, under the roof time. Well, worth it till it leaks.

Was a podcast on the Beeb about it the other day. Hopefully @Onoff will print us one up.

Let us say that you can get PV installed at £750/kWp. A kWp will generate between 850 and 1050 kWh/year, depending on where in the country you are, and how well orientated your system is (any fool can make a PV system fail). Assuming that 50% of the PV is self use (the other 50% helps to keep others bills down), then that is, in effect, £1500/kWp. Taking a ten year life (which is very low) that is £150/kWp. Taking a median generation of 950 kWh/year, £150/ 950 kWh/year is £0.16/kWh. Or 12p cheaper than imported power.

Gift it to mine

Welcome WHat do you mean by this?

A possible future carbon tax. This would make the modules more expensive and any imported electrical energy that was generated from gas, coal and biomass.

https://www.ena-eng.org/gen-ttr/ In the past (it is a decade since I stopped workign in the industry), MCS had a list of approved modules, but inverters were 'open'. Not sure if that is stil the case now.

Sit outside and enjoy the Perseid meteor shower, maximum tonight. https://www.rmg.co.uk/stories/topics/perseid-meteor-shower-guide-uk-when-where-to-see (starting to cloud over down here, so everything East is in for thunderstorms, probably)

Is that because your part of Dorset is burning? Someone set fire to the A30 down my way yesterday.

I may be wrong, I often am, but I think @Radian was refering to putting a CT clamp on it.

China Export. CE is a self certificate scheme, if I remember correctly.

Fit a cheap meter on the generation side.

Planers were used a lot in the furniture industry. This is how the 'old timers' ordered 5 pint of ale.

Just going on what we have to keep ours at. Cooking gets rid of the bacteria, usually.