@derek-m If you air any concerns, I feel sure someone else will know the solution and maybe already have been there! As to the CT clamp mis-orientation, at least it didn’t increase your actual electrical consumption even if it did nothing for your blood pressure! Sounds like a good set-up and should be giving you a very ‘green’ feeling now.;-) Regards, Toodles.

Posted by: @minos

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About 3 weeks ago I installed 4.05 kW of Longi solar panels [...]
  After the solar side was wired up my electricity consumption went up 10 fold!

Please elaborate @minos

When you write "I installed" does that indicate that you are self-installing, rather than using an MCS-accredited professional?

You are by no means the first to have CT-clamps installed the wrong way around!
But it shouldn't happen when using a professional of course.

It can often be the case that the CT clamp provides export limitation to the 3.68kW (16A) level permitted by the Distribution Network Operator (DNO).
Those situations are regarded as more serious because it can result in a higher level of export... a technical breach of the G99 approval.

But as @toodles observes, your Electricity Supplier should be billing you on your (Smart) Meter readings.
Those remain independent of the internal control/measurement system offered by the Solax inverter and storage battery.

If you are a self-installer, then you are indeed very welcome here.
There are a number of us on this forum... who have amassed a healthy portfolio of blunders between us! 🙂 

@transparent There is a saying along the lines of: ‘We all learn by our mistakes - so keep making them.’ ;-))) Regards, Toodles.

@transparent Sorry I was misleading. I am definitely not a self-installer.  I had all the work done by an MCS approved installer. The electricians who wired up the panels, inverter and battery admitted it was only the second one of this particular make they had done.  To their credit they came immediately to fix the problem once it was pointed out to them what was happening. Unfortunately I do not have a smart meter so I assume I will have to bear the expense of the increased "consumption". 

Why I do not have a smart meter is a tale in iteself but one I won't go into here.  I have changed my supplier to Octopus and requested the installation of a smart meter.  I am on the waiting list but they seem to be unable to give me any idea of how long it will be.  Does anyone know? Is it weeks or months?

@minos Dont worry, even without the smart meter Im sure you will only get billed for your actual usage from the good old fashioned meter 🙂 My personal top mess up was installing my heat meter the wrong way around, amazingly it still gave a reading, just not the right reading LOL

@minos No matter what the metering system used, you should only be charged for your actual consumption, there is no system that would charge you what a misplaced CT clamp on the consumer side said! Regards, Toodles.

Posted by: @minos

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Why I do not have a smart meter is a tale in itself ....

I am on the waiting list but they seem to be unable to give me any idea of how long it will be. Does anyone know?

Yes... I have lots of information about Smart Meters and their installation -

but too much to post it here on the general Welcome topic! 😎 

Have a look at the topic about How Smart Meters work and the one on Smart Meter Installation...
and then decide on which (if either) you would like to ask your questions!

@toodles Thanks for trying to reassure me. I don't quite understand.  I was responding and reporting on the readings I was taking from the electricity meter itself.  These are the same readings that I send monthly to my supplier and who bills me accordingly. Generally speaking I use between 2 and 4 units of electricity a day.  Here are the readings I took each morning:

21 Aug 45439

22 Aug 45442

23 Aug 45444

24 Aug 45447

Solar Panels etc wired up

25 Aug 45463

26 Aug 45482

27 Aug 45503

28 Aug 45520

Last four days readings sent to electricians who  that day return and reverse ct clamp

29 Aug 45525

Every day since then 45525.

Surely I will have to pay for this "usage."

minos

You are correct @minos

The reversal of the CT clamp has caused the Solax system to import electricity from the grid...
presumably to fill the battery during the hours when the solar-panels were active.

However, you are protected by the Consumer Rights Act, even if the installers aren't prepared to 'make good' under their system warranty or MCS regulations.

You have no need to await a bill. You should simply send the above meter readings to the installers and ask that they reimburse you at whatever electricity rate your tariff currently states.

This Forum is very tolerant of newcomers... including professional installers.
If they want to join in the conversation and attempt to understand how this issue occurred, then they are very welcome to do so.

If I were an installer, then I'd be raising this with Solax.
It is feasible for their software to be re-written such that the same mistake can't happen in future.

@minos That rather sounds as though the whole system had a hiccup and it is now sorting this error out. If the reading is not changing when you are consuming each day, I suspect it will start counting up again once it has ‘equalised’. There are far more knowledgable subscribers to the forum who will be able to advise I’m sure. FWIIW, from time to time my Eddi indicates that energy is flowing INTO my solar panels, I have not changed any CT clamp arrangements and most of the time, Eddi works correctly. Regards, Toodles.

@toodles I think the meter is not changing because I am not drawing any power from the grid.  The panels are producing more than enough for my current needs. I suppose I could make an issue of it with the installers but it hardly seems worth it for the relatively small sum of money involved.  I'm just glad I kept an eye on it and had the courage to raise it with the installers after only a few days and not after a month or so.

Which brings me to the question I really wanted to ask and that brought me to the forum in the first place.  Since installation the ASHP has been used only for DHW. The hot water storage temperature is set to 50°with an allowed  drop of 10°. Every couple of days the water temp drops to 40° and the heat pump uses about 1.75kWh to raise it back to 50°.  Every two weeks a legionnaires cycle runs, this has happen only once since installation. The Ecodan panel reports the following:

Aug Elec. consumption 37kWh, heat delivered 19kWh

Sep so far consumption 15kWh, heat delivered 5kWh.

If I understand correctly this makes for a COP in Aug of approx. 0.5 and in Sep approx. 0.3.  Can this possibly be correct or am I failing to understand what is going on?

Also am I getting carried away and posting this question to the wrong section of the forum?  Tell me if I am.  I never expected such rapid responses to my initial post.

Posted by: @minos

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Can this possibly be correct or am I failing to understand what is going on? 

I wonder if the numbers are the wrong way round? Perhaps should be 19/5 used, 37/15 delivered.

Interesting to note that your tank temp drop behaviour is very similar to mine, ie around 5 degrees/24h, and I have the same settings ie reheat at 40 to 50 degrees. Suggests this may be typical behaviour (based on an observational study, n = 2).