SteamyTea

You can see that in the charts from @joe90's I put up. His base load is around 400W.

It is not pressure, it is flow rate. In a gravity system, flow rate is affected by the distance between the shower head and the loft tank (what gravity does). You may get away with larger bore pipes (probably easier to give it a go than calculate it). I have a very cheap shower pump that works well. Just make sure your cylinder and loft tank can cope with the flow, you don't want to drain the loft tank while using the showers. Pumps are a bit noisy though.

Why I have done things to reduce them. First chart is all my power draws. 41% of the time during 2020, I drew nothing at all. Then 39% of the time I drew less than or equal to 100W. Second chart zooms in on the 0 to 100W window. The main power draw is between 29 and 42W. Most of that will be the fridge and the PC charging.

Looks like a plastic tank. Just move it if all the holes are still in the right place. If you use a vented system (looks like that is what you have), then there is no mucking about with certificates and annual checks of a G3 unvented system.

Get them to design it, they may learn something.

They are both ghastly. One is brutal and the other is a 300 quid shed.

Apart from clothes washing, I don't have the others. That must be the secret. And living alone.

Probably not, but as you say, there was one disinfecting cycle.

Why is it drawing at all? This will make calculation difficult as you will not know when the PV is exporting, and how much, or when the HP is on. But the good side is it should reduce you imports.

Ewwwww He is just passing though, bit more thrutching and he will be outted.

And Boomers, and probably most other sectors of society. Don't forget the senior IT managers, and people that like data. The feeble minded. Oh, and the press/media. Just about anyone that is not 'privy' to his inside information, which comes from who knows where, but has to be true, he says so.

It is more me, but then I have never used an Arduino. There is a MicroPython system for the ESP2866. Does this new RPi have wireless/Bluetooth built in? I see it has an RTC

@joe90 Basically, as ~45% of your usage is fixed load i.e. MVHR and Sewage Treatment, which cannot be time shifted, and your ASHP loads are small, peaking at 70% extra (in winter), and as you know, you don't have the heating on for long, there is nothing to be gained by swapping to E7 as you generally need to shift 80% of your load to the 7 hour window. E10, if you can get it (I can't) may offer a slight financial advantage, but it is pennies, not pounds. Really down to finding the overall cheapest price.

And here are the means for @joe90's Your loft is amazingly stable.

Because if you fit UFH you don't want to warm the ground up. You have to remember that the ground under a house really gets above 12 to 14°C.

You have your own nuclear fission reactor, cool. Just pump it into the house to warm it up.

I shall see if I have the old spreadsheet I did a couple of summers back. This lockdown is good, means I don't have to 'cross the border, under the cover of darkness' to get into Devon to see you. But come the spring, we should be alright. Here we go. Blue columns are the complete year, red line is the winter, Dec, Jan and Feb. You could possibly benefit financially, but when you look at your absolute numbers, they are pretty low.

Yes. Can you add 300mm of insulation, and then 100mm of concrete? You may need more 'depth' around the edges.

Most of the SunBoys have Bluetooth connections to. See if the Growatt does, ar you may be able to get an attachment. That energy meter I sent the link for could log the production. I think the sender unit in that one can take up to 3 inputs, so one could be on the generation meter and the other on the import meter, if they are close to each other. You would need a RPi to do the logging though or it will just sum the inputs.

Just sent a message to my mate in Whitchurch, no reply yet.

Electricity takes the path of least resistance, so flows to where it is needed. Think of it as a pond what has many streams coming off it, each steam has a different flow rate (the resistance) but if there is a jug at each end (the load), once the jugs are full (all at the same level), then there is nowhere for the power to go.

Sent the special bitcoin to you already, have you lost it.

I work with someone that thinks the more you spend, the better quality you get. I have just posted him the link, be interesting to see if he buys it.

That could save me 600 quid https://www.ebay.co.uk/itm/Electric-Paint-Sprayer-Gun-Spraygun-Handheld-Fence-Home-Garden-Outdoor-Indoor/122567690666 What are they thinking

Yes I could, but got no use for the walk on glazing that comes with it, unless I make a spray booth. Shall look on fleabay and the discount stores.