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Rank 2
February 25, 2023
Solved

High electricity usage - what could it be?

  • February 25, 2023
  • 62 replies
  • 1676 views

My apartment is on electricity only! why my electricity  heating using 10KW to run in 50 minutes! It cost me 4£ to run for only 50 minutes! 

Best answer by M.isterW

Updated on 18/08/25 by Ben_OVO

If your property runs purely off electricity and not gas, then you may have electric heating / radiators, possibly storage heaters, and maybe an immersion tank to heat the water. A lot of this sort of kit can use a lot of electricity, especially if it’s quite old. If you’d like tips on the most cost efficient ways to use your appliances, it's worth doing a quick Google search of ‘energy saving tips in (your local area). You should find that there will be organisations who will offer this sort of advice, often for free. You may also be able to get this advice from your local council.

 

If you’ve got a smart meter The ‘Usage’ pages of your online account / app are really useful to see what times of the day your electricity usage is highest, which helps you to get an idea of what is causing the higher usage. For the most accurate data you’ll need to have your smart meter set to send us half-hourly meter readings. Below are guides for changing your smart meter reading schedule online, and using the ‘Usage’ pages 👇

 

 

You have something that's heating the water that feeds the radiators, likely an electric boiler. You probably have a hot water cylinder heated by an immersion heater.

 

To reduce the cost of your hot water you can find a tariff that offers cheaper electricity at certain times (normally overnight) and use a timer on your immersion heater.

 

Reducing the cost of your heating is harder because it doesn't look like you have any way of storing the heat. If you can find your boiler and tell us what it is we might be able to suggest some options.

62 replies

Newcomer
November 30, 2024

 
My partner and I live in a one bedroom flat. We are on holiday and are currently away for almost 2 weeks now. But I just checked our electricity usage and it’s so high even when there’s no one at home? Some of the appliances are plugged in at home such as fridge freezer and router. We have the towel rack heating on in the toilet. None of the radiators are switched on. Anyone has any idea why this is happening?  

BPLightlog
Super User
Super User
December 2, 2024

Have you checked if these are actual readings or maybe estimates? Even with a smart meter, sometimes readings do not get through and in that case they will estimate your usage. Your last graph with the same usage each day looks exactly like that. 

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Newcomer
March 24, 2025

New to this forum, it's my last resort as "customer service" chat was a nightmare.

 

I'm convinced the payg meter is or was clocking too fast.  We had the payg app upgrade a while back and we rinsed through £50 in about 4 days. Considering it's just my wife and I, no games machines, no dishwasher this was insane. 

For gas and electric last tax year we spent £3,500 ! 

I went on the customer service chat, had two experiences. First the representative said it may be clocking too fast and they would have to generate a report, that never turned up.   The second experience the representative was so rude, stating in his personal "25 years experience" he can tell the meter is "just fine".  On asking him how we got through £50 in 4 days he terminated the chat. Asked for a transcript, that never turned up. So we are stuck.

Obviously I'm looking to switch supliers, but I could do with some advice as to how how to prove whether it is or has been clocking too fast.

 

Any advice would be much appreciated.

waltyboy
Rank 8
Rank 8
March 24, 2025

Hi ​@TOKF,

 

Don’t worry, this problem of possibly high readings has been raised in the past on the forum…for example, one good place to start researching would be the following:

https://forum.ovoenergy.com/topic/show?tid=9490&fid=140

 

Hope you find some satisfactory pointers…let us know how you get on, all the best….

 

 

 

 

Walt. 2013: 3.2kW PV East/West + Fronius IG, >26MWh (of which, to date mid-2025, 20MWh exported). 2023: 2.4kWh LiFePo4 battery. 2024: Tadö wireless smart stat v3; Electriq split unit 2.6kW AAHP (“air conditioner”).
Emmanuelle_OVO
Retired Moderator
Retired Moderator
March 25, 2025

Hey ​@TOKF 

Sorry to hear about the issues you’re having. There are lots of things that can cause high bills the topics below might be helpful to you:
 

 

What’s the best way to locate an energy guzzling appliance?

 

Worried that your electricity usage seems high? By checking the usage of each circuit you might be able to find out the particular appliance which is the culprit. The meter will need to have decimals showing in the reading for this test to be useful:

  1. Leave the main breaker in.
  2. Turn off all individual circuits (on the fuse board, for example).
  3. The electricity meter should stop clocking usage. If not, there could be a short in the fuse/breaker panel box or an appliance connected without fuse/breaker protection. An electrician will be needed to investigate this.
  4. Turn on one individual circuit.
  5. Watch to see if the electric meter starts to clock usage.
  6. Turn off that individual circuit and turn on another one. Again, watch to see if the electric meter is clocking.
  7. Repeat step 6 until all individual circuits have been checked.

You’re looking for a circuit that causes the meter to clock a lot of usage, compared to the other circuits. There could be a problem with an appliance or a connection on that circuit. We’d recommend contacting an electrician to check the appliances on this circuit, particularly if there are any old or potentially faulty appliances plugged in.  Find out the average usage for each appliances on this great guide and some great energy saving advice on the Centre for Sustainable Energy.


How do I perform a Creep Test on my electricity meter?


If you’ve been unable to get to the bottom of an increase in our usage by locating a greedy appliance, the next step would be to carry out an initial check on the accuracy of the meter with a ‘Creep Test’. To carry this out: turn off the power to your fuse box and check if the meter continues to clock. If the meter clocks (more than 1 - 2 units which could be down to residual power in the wires)  then it's either faulty, or clocking someone else’s usage.

 

If your meter is in a communal meter cupboard, sometimes the meter details can get mixed up. Firstly it’s worth checking the meter serial number on the meter matches the serial number registered on your account. You can see this on the ‘Meter readings’ page of your online account.

Renewable Energy? Big Fan.
Newcomer
March 25, 2025

I appreciate the reply and will run a creep test, but the fact remains these suggestions are very general.  I understand they have to start somewhere, however this is an isolated incident, linked to the app being changed and it wiped £50 in 4 days.   

We didn't start running some electric guzzling appliance, we've lived here 12 years, we have next to nothing running now the kids are at uni.

Yes, it has raised the broader issue of ovo overcharging (something there is history of) but the issue is where did my £50 go in 4 days??

waltyboy
Rank 8
Rank 8
March 25, 2025

Hi ​@TOKF Yes, that 50 quid in four days does indeed sound rather steep, a rate of around £4,500 per annum.
 

We have no way of commenting on individual bills obviously, but were I you, I’d be physically taking and recording readings once in the morning and again at night.  I’ve done this every day for the last 15 years, although since getting the smart meter a year or two ago I now only take electricity readings, and those only once a day before bedtime: I find the OVO app now is so reliable and informative, but I still like to check!

 

I’m assuming your usage data over the last X number of years hasn’t been lost, either you or OVO between you will have at the very least a billing history and hopefully you will be able to have a fruitful discussion with OVO about any strange anomalies or variation from your average usage month by month. 
 

I’m not generally well up on metering issues (others on the forum are) and you mention your PAYG app, which I’m not familiar with, is it possible to think about getting a smart meter? I realise it’s not always possible to do so, and with the app it sounds to me as though you may already have one? The small additional display that comes with the smart meter (the “In Home Display” or IHD) is very helpful, and the actual meters themselves are very dependable. Years ago, when I was with a different supplier, I did spot anomalous readings from my old analogue meter (you remember the type with the spinning wheel) and it was replaced very speedily indeed. Unfortunately in those days by another equally limited one, but at least the replacement had a digital display. 
 

Hope you get some answers soon, and perhaps someone with knowledge of your app will come on here to help, all the best….
 

 

Walt. 2013: 3.2kW PV East/West + Fronius IG, >26MWh (of which, to date mid-2025, 20MWh exported). 2023: 2.4kWh LiFePo4 battery. 2024: Tadö wireless smart stat v3; Electriq split unit 2.6kW AAHP (“air conditioner”).
Abby_OVO
Community Manager
Community Manager
March 26, 2025

Hey ​@TOKF 

 

Sorry to hear about this.

 

No one at the Forum has access to accounts so we can’t know for sure what’s caused the increase. 

 

The Support Team would be able to view information that would help understand what’s happened. If it’s settled down since those 4 days, it may not be a leak or meter issue and may just have been that more energy was used. Do you have gas also? Was the usage on electricity only? It may be that there is a debt on the meter and a repayment rate kicked in? We can only make suggestions on the Forum so we would recommend getting back in touch with the team for support.

 

I’ve also linked below to a few topics which may be helpful if you think any of the other suggestions may be the cause:

 

 

Keep us updated with how you get on.

Currently Playing: She's Electric
Newcomer
December 3, 2025

Hi guys, we have a heat pump system and between 0000 - 0700 our electricity usage is between 840Wh and 1.91kWh. Everything in the house is off and our hot water isn’t due to come on until 0700 so I’m scratching my head as to what it can be. It’s normal to wake up to my smart reader showing over £3.00 used by 0700 so have to sort it! 

waltyboy
Rank 8
Rank 8
December 3, 2025

Hi Wil…£3 between midnight and early morning does sound a lot.  Does your 0700 hours reading on the IHD of £3 include the standing charges for the new day, which might account for some of it?
 

Also, even with everything apparently turned off, 120-150 Watts could be quite a normal hourly average, even overnight.  In my own case, for instance, my fridge/freezer and small chest freezer and additional small stuff I leave plugged in overnight like the router etc. together average about 100Wh.  So your figure of 900-odd Wh might not be such an outlier?

 

 

 

Walt. 2013: 3.2kW PV East/West + Fronius IG, >26MWh (of which, to date mid-2025, 20MWh exported). 2023: 2.4kWh LiFePo4 battery. 2024: Tadö wireless smart stat v3; Electriq split unit 2.6kW AAHP (“air conditioner”).