It's called "Stored Heat" because the heating be it water heating or room heating is the only thing running on it. I have a seperate consumer unit with my heaters on. It's not economy 7. In my case with southern electric, it's called 'Superdeal' for whom it is super, I'm not sure, them I think. LOL
Twee:Who is your supplier ?
This is not storage heaters - if you are on economy 7 - you have 7 hours of cheap rate electricity overnight - which, I presume would be the "NIGHT" reading - what Stored heat is, is beyond me - I don't think that economy 7 can differentiate between different uses of electricity - I think that ALL your useage between hours of 10 pm and 5 am are economy 7 - so why it would be called Stored HEAT is strange....
I suggest that you ask your supplier