How do OVO convert gas units to Kwh on a smart meter?

There is a smart meter but, for a second time, it has ceased sending readings - engineer not due to arrive until 17th of this month.

I’ve started taking gas meter readings, not because I’m disputing the bills, but to get to grips with a new boiler and control system in order to optimise the settings. However what I have noticed is that there doesn’t seem to be a great deal of correlation between the readings sent and what appears in Usage.  In answer to Abby_OVO’s questions, I can see the meter readings that I’ve submitted in the Meter Readings areas which are all in cubic metres. I’m then referring to the Usage section to see daily usage (now converted in KWH’s). I’d expect to see a pattern being followed but there isn’t.

To give an example the cu mtrs used per the meter readings for the first 8 days of February are :

11.41      12.93     14.48    15.65    14.9     16.11      13.5         10.7

but the KWH usage levels recorded in my account are :

156.45   168.25   190.97   179.76   191    168.11    123.35     134.42

The later entries seem well out. I used the highest amount of 16.11 on the 6th but usage in my account is a lot less than several other days. Also the usage on the 8th was the lowest at 10.7 yet a lot higher than the previous day in my account. 

What is the explanation?

Apologies! The KWH usage levels in the last post should read :

144.39    156.69    179.53    168.31    179.53    156.69    111.92    134.42

I errorneously sent the combined gas and electricity usage in the last post.

I can also now see that despite the fact that I’m entering the date of the reading it might actually be recorded as a day early in my account as there is a far greater correlation between the 2 sets of figures when read that way. But there’s 2 usages of 179.53 and 2 of  156.69 recorded but the cubic metres used have never been identical. 

On the Gas Details page of every bill, you will see this information. It shows the calculation that is made to convert meter units to kWh. I have underlined the most important part of this statement. The calorific value changes each day (and is different in different areas of the country) so that is why the same unit usage on different days may be produce a different result when converted. 

I have underlined the most important part of this statement. 
  

Old pedant back again … the OPSS guidance on calculating gas bills states quite categorically that “gas transporters are required to maintain [the CV] within 38 MJ/m³ to 41 MJ/m³”. I haven’t been able to find where this requirement comes from. 

This means that the kWh/m³ quick conversion factor (you quoted 11.2) ranges from 10.8 to 11.6. If the kWh figures you see are outside this range, there’s something wrong.

Using Lindsay’s revised figures and applying her one-day shift between readings and consumption, the reverse-calculated CVs are within the permitted range - apart from the latest. That’s not totally surprising: CVs are usually published the day after sampling sampling, but they aren’t finalized until a day or two later.

The actual day-by-day CVs for each zone are published by National Gas.

Lindsay’s figures look quite reasonable.