SteamyTea

well Jesus could walk on water, and turn it into wine. But I bet he cannot sort out these problems.

How much shading do you get from all those trees?

Reminds me of that Only Fools and Horses sketch where Delboy hands Rodney (who has 2 O Levels) a different calculator and asks him to try again to see if they get a better answer.

The problem about using multiple inputs to any heating system is the both the inputs and outputs vary. Inputs very in time and temperature, as do the outputs. If we knew in advance the load we wanted from a system then the problem would be greatly simplified.

'Let's play hunt the sausage' is the winner.

Looks like a Florigo range, they are Dutch I think. Don't get much change, if any, from £60k for a 3 pan one.

Yes, it should be. Work now.

Run outside and see if it is the ASHP or the treatment plant.

They will. You can get around this by using two sensors, one from the PV and one into the house, then subtract one channel from the other. How I found out a large PV installation in the community centre was wired into one of the phases that had hardly ever load on it. To do that does require a logger on it, but these are easy enough to make. Tomorrow I shall see if I can dig out one of my old CCs and play about with it, if I get time.

Just a quick note, I think your CurrentCost uses a clamp on sensor, these can misread from an inductive load and they do not compensate for different voltages. Usually this is not a problem, but don't trust the number totally, it is usually within 5%, but depending on the power factor, can be 20 percent out. Though I never found much difference over a year, but then I don't have any large inductive loads. Does it have an RJ11 socket in the back?

That jump you are seeing is about the same as a 2 kW heater. What things do you have in the house that can draw that much energy i.e. kettle, cooker, oven, vacuum cleaner, fan heater (friend of mine left one on in his loft for months). It is also about the same as your HP draws.

Good, that has eliminated that then.

Get the cat to answer it

As @dpmiller says, maybe the meter is the wrong way around. But your solar diversion could also be part responsible for your inconsistent usage. If your tank is in a ready to heat state during the day, solar will probably go into it, if that same state is at night, then the HP will take over. Can you set things up so that the HP will only heat the water when it is dark, easy this time of year, not so easy in summer, but your solar should do most of the work then.

You can tune a system to be very efficient when you have a regular outcome i.e known volume and temperature of water to heat. Somewhere, along the line, a regular setup will only hit that point I frequently. The problem is, for most people, the higher capital costs. But worth thinking about and costing out if your DHW usage is high i.e lots of baths in a day. Worth remembering that a modulating gas boiler is sized, generally, for the DHW load and not the space heating load. And my E7 setup is sized and controlled on a room by room basis. I can totally, and easily, disconnect the space heating and still have DHW, or the other way around. Space heating and DHW do different things, at different times and at different temperatures.

In some ways, it may be better having 2 heat pumps, one to do the house heating, the other just for DHW. A non inverter type for DHW would be a good option. Trouble is, we all want one device to do everything i.e I want my car to have the acceleration of a Tesla S, the economy of a Nissan Leaf, the handling and road holding of a 911, but the comfort of the original DS5. And the ability to do 1000 miles between fuel stops. It must also get me home when I am drunk (though I found the forging handing and 70 profile tyres on my old 309 helped here), and it must not cost any more than a Dacia base model. Needs to tow 2 tonnes as well, and be convertible into a camper, with bog and shower. Can't see even the best gas boiler doing all that.

I think they are rebadged imports. And not inverter type. Good for what they are designed for, dumbly pumping out warm water 24/7.

http://www.dreamheatpumps.co.uk/5kw_heat_pump_SWIM.html It is for a swimming pool.

You are a winner mate, don't let anyone put you down.

Go on then, run away. So no official warnings, what a let down.

So how many warnings have I had? Less than @pocster.

And your point is, apart from running out of original thoughts. I think site moderators should stick to moderation, not shit stirring with a holier than thou attitude.

(expletive deleted) you

Or Father, in your case.