Can anyone help me understand these bills?

SPlatten

@Gerry1, sounds like good advice although with everything off, that means no hot water and no heating, no oven either.  We don't have gas.

Gerry1

SPlatten said:

@Gerry1, sounds like good advice although with everything off, that means no hot water and no heating, no oven either.  We don't have gas.

Last thing at night until first thing in the morning?  It doesn't have to be a long time, but the longer it is the more chance of finding any problem.

Robin9

@Splatten You have bills of over £200 and you complain of a little inconvenience  in trying to identify the cause !

SPlatten

@Robin9, its easier said than done, it means everyone in the house doing nothing which is easier said than done.

Gerry1

SPlatten said:

@Robin9, its easier said than done, it means everyone in the house doing nothing which is easier said than done.

No pain, no gain.  Surely the last person to bed can turn the mains off and the first one to rise can turn it on again?

It's not like a week long power cut !

theoretica

Does the ASHP system have an immersion heater or other booster?

Also first sanity check - does the reading on your meter match the smart readings given?