Have solar, economy 7 and battery - day time reading clocking at night?

What meter have you got @GaryAbs ?

It’s a Landis + Gyr E470 Type 5424

Ok, these have been notoriously difficult to understand. You may have done this but just make sure you’re reading R01 and R02 for your peak and off peak readings. Sometimes there’s a ‘total’ register which logs everything together. 
 

Hi thanks for this yes I’ve been out and double checked I have Rate1 and Rate2 and I am definitely reading it correctly I am just at a loss as to why this is happening 

Has this ‘always’ happened or since the solar was installed for example?

So I can’t answer that as I don’t know because we only noticed it when we had the panels fitted and we were not saving any money so we have been monitoring it from about June this year and it does it every night 

Ok, there’s a couple of other things to check then. 
1. How is the house wiring configured? It may be that there’s a circuit which is switched on to take advantage of off peak. If the wiring isn’t set up for that, you might not have everything set up as off-peak usage. (A picture would help a few of us check  - no personal details)
2. What do your bills look like? Do they follow the higher usage you see on the meter?

Not being an electrician I have no idea. What pictures would you need to see happy to sort thanks for all your help so far. What I can’t get my head round is if we are using this 10kw at night why is it going onto our day rate 

Just a picture showing the meter and the cables around it