Why is my smart meter electricity import usage higher overnight than during the day?

Hi @janetbeal ,

Just so you’re aware, the OVO Forum is patrolled by forum volunteers such as myself. We don’t work for OVO so we can’t access your account from here.

Could you show us some photos of your smart meters and also screenshots of those usage graphs please? We’re really good at puzzle solving, so chances are good that we can figure this one out!

July by day - I was on holiday, returning on the 8th.

 half hourly for 3rd July - on holiday, so nearly everything turned off

half hourly for 2nd Sept - shows higher usage overnight than most of the day.  Spikes are reasonable - making tea early morning and mid afternoon, cooking dinner in the evening.  

Thanks! I’ll see if I can figure anything out, but I also know that @nealmurphy and @juliamc quite enjoy this type of puzzle. I’ll see if they’re free. :)

Bookmarked for later ! 

many thanks - let me know if you need any more information

This one may stump me!

2nd Sept has peaks at the correct times, so not a clock issue.

You'd expect the graph to be pretty uniform when away and with slightly higher use during the day as the fridge freezer would be working harder due to higher ambient temperature.

That's a very low daytime baseload.

Just to get some background. What used all the electricity on the day you got back on the 8th?

I assume you don't have solar?

I have solar panels, with a diverter to the immersion heater, so in the summer I hardly use the gas boiler to heat water as the solar panels do most of this.

I have an air con unit in one room, so electricity usage was higher on the very hot days this summer, and I do use a fan overnight - but not when I was away on holiday. 

The high usage on 8th July was charging my electric car when I got back from holiday.

@janetbeal 

so when do you normally charge your car?

Ooh, so intriguing @janetbeal !! Am I right in thinking you have an EV which you charged when you returned home? The overnight usage isn’t too huge but could there be a small electric heater somewhere on a timer eg greenhouse or something ? Keep us posted...