Why am I being billed to readings with a decimal place?

On average rounding errors even out so some win and some lose 

Mmmmmm.......I wonder if you went into a shop and purchased an item for £25.50 and noticed the next person getting it for £25, would you accept if the salesperson told you the items are sold on a some win some lose on price basis. I doubt it. Again I mention rounding errors are not possible using simple subtraction with whole numbers. 

That happens to me all the time 

Oh dear....I was wondering if one could approach the inland revenue with that approach. "Sorry but this year I will be paying a bit less, as I have rounded you down"......;-))))

All the income figures on the self assessment form are rounded down and all the tax paid are rounded up, so they’re ahead of you. 

You are right.....but that is on their side, you cannot say it to them....also they wouldn't round up or down whole numbers and end up with a tail of numbers after a decimal point. 

This is a good explanation Firedog thanks for your trouble. Just a small point, what I am referring to is not 80p but 0.80kWh. I can still accept that your reasoning can be applied to the anomaly. However nowhere on any bills or the OVO site does it mention how the readings are calculated using numbers after the decimal point, estimated or not.. I appreciate your taking time, I must tell you that I have asked OVO by various means, phone, email, forum but only from yourself has there  been a sensible explanation.

Another shot of meter readings…….nowhere until the UNITS USED at the bottom of the page does the decimal point figure 55.80kWh appear.

 By the way the estimated reading should not have been. This has been sorted out.

Cheers

A post by OVO about calorific values  Updated on 25/04/22 by Jess_OVO states:-

“ As this can change month to month, the calorific value we use to calculate your charges may differ slightly to the one used by your meter, which uses a set value of 39.2.”

I would refer OVO to - Calculation of average calorific value in accordance with the Gas (Calculation of Thermal Energy) Regulations 1996

The CV used for consumer billing should be an average of the daily average values received from National Grid for the billing period. The use of a fixed CV, which some suppliers refer to as an ‘industry standard’, is not consistent with the Regulations.

The above shows that if OVO were using a set value of 39.2, then they contravening the requirement to use averages.

This is a simple thing to do for OVO. The National Grid issues CV each day for varying areas and if I can average out the cv every day then I am sure the rocket scientists at OVO can do the same. They must do it to produce a bill. If they use a set value then the bill is almost certainly going to be in error.

I now have question. Can someone from OVO please tell me exactly how/when (over what period) they calculate the CV and what it is? 

I do not have a meter and enter my readings online manually every day.

Thanks for the response. The problem is support has not given me an answer. As an old age pensioner I think I will have passed  on before OVO responds officially  to any of my queries. Why are people being asked to look on the forum for answers? Surely OVO could give answers directly.