Negative home load when sunny

[Summergolfer]

Hi

Please could someone help?

Whenever it's sunny and my house isn't using much energy, it's almost like the calculations go crazy and it puts my home into a negative load?

I do not have any secondary source of energy generation. Just solar panels and two batteries.

I've changed the direction of the CT clamp and this doesn't fix the problem. Like other users, it looks 'normal' in the evening when my house is using more electric and there's no solar generation. It's always when there's solar generation more than I'm using. I feel like the numbers are little off when I compare to what octopus tells me I've generated? Is it a fault to go back to the installers?

Can anyone help, I've tried everything?

Many thanks in advance

[MaterialBarracuda48]

It looks ok to my eyes, and I don't see the negative house load you speak of.
Can you bring up graphs for a day (or a few days) so that the power distribution can be seen?

[Summergolfer]

Oh my I've had that many screenshots I've clicked the wrong one. Apologies.

I've edited the post and attached the right screenshot. I'm having a terrible time with it today!

Thanks in advance

[MaterialBarracuda48]

That screenshot looks better, either your inverter has gone potty (needing a full reboot) or the CT clamp is placed on wrong wire/direction.

Do you have a picture of where the CT clamp is placed currently?

[Summergolfer]

Really appreciate the help, thanks. It's an older house so not the cleanest of areas!

Its always misread data but still looked closer to normal in evenings (ie, house uses 2-3kwh when some appliances on, solar might be 300w on a cloudy day and grid number looked normal) but when high generation and low usage it goes crazy. But even solar generation numbers aren't the same as what octopus or my meter said I've gained.

The arrow is pointing away from the black fuse box towards the grey box on a grey wire (that has a brown ring around it)

Photo of CT clamp

[MaterialBarracuda48]

I don't think it makes a difference, but the CT clamp for mine as placed after the meter (though that looks damn tight!)
I think in theory that it should work just the same as it's normally measuring the house flow to grid.

I see Henley blocks, but cannot of course see fully, do you have anything like a EVCP installed?

Octopus and Fox will never be equal in their value, but shouldn't be miles off, the CT clamp is nowhere near as accurate as your meter for sure.

[Summergolfer]

There's a few fuse box's for different areas but it does have a cable leading to my solar panels and heat pump fuse box (one fusebox for this).

We have two batteries so I'm wondering if one CT clamp struggles to monitor all sources in its calculation?

[MaterialBarracuda48]

If you have two batteries plugged into your inverter, it shouldn't affect any grid load (home) values.
Either your inverter has 'crashed' and needs a reboot to get it reading correctly, or your CT clamp is in the wrong place.

You should never see a negative house load.
Do you know how to restart the system, a full shutdown with batteries included?

[Summergolfer]

Ah I've had a feeling about my inverter. When it was fitted to the side of my house, rain was getting into the protective sleeves for the isolatorl. Installers come out and "fixed and replaced" just the isolator and sleeve and said nothing has affected the isolator. I've never been convinced, plus they replaced the outside sleeve with the same sleeve by the looks of it. I've never trusted it since.

I've done a restart already including batteries so the inverter had no power (screen goes off) and turned it all back on again. Calculation still goes crazy.

[MaterialBarracuda48]

Yeah that don't sound good, water & electric

They need to come back I think and check it over, as you should not see these negative loads, it does mean the poor inverter won't probably know what to do with the power potentially.

Can you name your Inverter and find your software levels in your App, as never know it could be duff?