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Rank 2
January 8, 2023
Solved

The kWhs charged for gas on our bill don't match the difference in readings?

  • January 8, 2023
  • 20 replies
  • 780 views

For the last 3 months our gas bill seems to be increasing huuuugely. For £80 usage to £200+ usage in a month! Nothings changed though. 

 

I thought I'd analyse the invoices a little closer and it looks like we're being charged 10-12 times more than we've actually used. This has been ongoing since we were moved from to Ovo 14 months ago. I've tried on chat to discuss but they were useless so we'll have to call between 9am and 5pm on a weekday. Not handy for people who work those hours! 

 

Can someone take a look at the screenshot in the feed to double check I've not read this incorrectly? I've checked the electric and what's been used is what has been billed. 

Best answer by BPLightlog

Updated on 15/08/25 by Ben_OVO

The below calculation is listed on all your monthly statements. You can access your monthly statements via your online account and app by following the steps in this guide:

 

 

 

The second screenshot looks like a full (mostly) Nov bill and the next a Dec bill - we are in winter and have had a really cold snap during that time so maybe this is to be expected? I know my own bill increases dramatically over winter months. 
From the meter readings, these are converted to kWh via a calculation given by the National Grid 

 

20 replies

Sjsouth16Author
Rank 2
January 8, 2023

Image 4 is electric - fine.

 

Image 2 and 3 are Decmber and November usage but this goes all the way back to November 2021. 

Image 1 is so far this billing cycle. 4th to 7th Jan. 

BPLightlog
Super User
Super User
January 8, 2023

Hi @Sjsouth16 your first screenshot says 4days standing charge and so is only for a small part of the month. The others are full months by the look of it

Sorry - just reread your notes. I’ll have another look

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
BPLightlog
Super User
Super User
January 8, 2023

Updated on 15/08/25 by Ben_OVO

The below calculation is listed on all your monthly statements. You can access your monthly statements via your online account and app by following the steps in this guide:

 

 

 

The second screenshot looks like a full (mostly) Nov bill and the next a Dec bill - we are in winter and have had a really cold snap during that time so maybe this is to be expected? I know my own bill increases dramatically over winter months. 
From the meter readings, these are converted to kWh via a calculation given by the National Grid 

 

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Sjsouth16Author
Rank 2
January 8, 2023

@BPLightlog thanks for your reply. As you can see from my electricity bill attached the units used match the kwh? Is Gas billed differently? 

Thanks 

 

BPLightlog
Super User
Super User
January 8, 2023

Yes @Sjsouth16 .. sorry I probably didn’t understand correctly. 
Electricity meters measure in kWh and this figure is multiplied by your Elec unit cost. 
Gas meters mostly measure in volume or cubic metres and this has to be converted to become kWh like I showed 

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Sjsouth16Author
Rank 2
January 8, 2023

Ok.. seems a little confusing. I dont understand why one is billed as what we've used and the other is multiplied. No wonder Sunak wants to make kids learn maths until 18. 

I'll give them a call tomorrow and see what they say. 

Would there be any explanation as to why the electricity has stayed the same but gas inflated so dramatically in a matter of weeks? Nothing has changed at home. We use a gas hob and have baths and showers. Tbh, I'm quite surprised the electricity stayed relatively the same when I've used the tumble loads for school uniform over winter. 

BPLightlog
Super User
Super User
January 8, 2023

Do you have gas heating @Sjsouth16 ?

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Sjsouth16Author
Rank 2
January 8, 2023

@BPLightlog Forgot about the heating. We do yes but it's set to 18c and on a timer. 6am until 8am and 6pm until 8pm. Other times we wear another layer so not to use the heating. Its usually only me and my daughter at home as my OH works away all week. I know it was colder the previous few months but it's was rarely on. 🤷🏻‍♀️

 

Looking at the hourly reading it seems middle of the night is when most use is showing. Its weird.

BPLightlog
Super User
Super User
January 8, 2023

Looking at the hourly reading it seems middle of the night is when most use is showing. Its weird.

Ok, even at the settings you mention it would use more and if there’s use overnight there’s probably a ‘frost’ setting which kicks in at very low temperatures and we did have a number of days below zero ❄️ 

Just another thought .. it’s worth checking your meter readings to see if any are estimated - just in case

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Sjsouth16Author
Rank 2
January 8, 2023

@BPLightlog thanks so much for your help. I have 3 screens on the go right now and it's starting to make some sense. The maths degree needed to figure out the charges is bonkers though haha. Even with a GCSE and AS level in Maths it's mind boggling. 

 

I'll accept that I'm wrong though and OVO maybe aren't charging me extortionate rates. Hopefully now the weather is a touch warmer we'll see the gas bill reduce... 🤞🤞🤞