SteamyTea

What I made it as well, for 2020.

If I did not bother with an inverter and just switched DC.

So no comparison with normal HPs then.

Don't people use bits of roof slate?

Someone must have a brick shed to try it out on.

Could you use a Tyvek type material on plastic battens to create a small void, then the mineral wool insulation, then VCL then plasterboard. If done with care the mineral wool is made windproof, but not vapour proof.

It is usual to have a house warming party. Trash the place as everyone knows a place gets decorated after the move.

Called 'supper' out your way.

You got to stop the water getting though, not just thinking that a lime finish will let it dry out faster. Do you have a gutter/downpipe leaking onto it? With your builder, there is still time.

https://youtu.be/NFutge4xn3w?t=25

No amount of lime is going to help there.

All she has to do is act. Conversation is limited to praising me. Why I dress as a Catholic Priest, Jimmy Saville or Paul Gadd.

Right, thinking cap on. I have E7 heating into a 200lt water cylinder. Two 3 kW elements (nominal). One at bottom and one at top of cylinder. You may have seen my charts about the temperature gradient elsewhere. If I where to wire those two elements in series, and with a bit of experimentation with the two built in thermostats, I could possibly run them off a very cheap PV installation (maybe modules hanging on walls) and a cheap 2 kW inverter (about 40 quid). The thermostats could probably handle 6 or 7 A DC, but I could test that first, and there would be 2 in series, so already a bit of failsafe built in. Seem to remember that a capacitor, or is it a resistor, can reduce arcing. What do you think?

You could read your main meter, a week later read it again. Isolate PV, leave a week and read meter again. See what the difference is (hope the weather/cloud cover is similar. If you have a high and consistent base load, much of your PV generation will be satisfying this. Your Inverter should also have some logging options in it, this can tell you an awful lot.

Did I miss which inverter you got fitted?

And you know you will not have to chase them once your cheque has cleared as they will go bankrupt.

Going to ask you next winter for yours, we all know you will have sized it incorrectly.

Too late, the Chinese did it on Space Force.

Seems low for a 6 kW system.

Are these the Cloud based ones? Were they setup and registered correctly?

I left my extension lead, unrolled, when I was working on a sauna. Popped out to the van, less than 5 minutes, came back to darkness. Someone had taken the plug off my lead. Bastards.

Shall turn that off as well.

(expletive deleted) you, I am switching it off, going to bankrupt the whole of the UK's power sector on my own.

FFS I am paying for your heating. But how many years will it take to cover the cost of your useless walk on glazing? That makes me feel a lot better.

Ohm's Law https://www.calculator.net/ohms-law-calculator.html