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Increase to Direct Debit - new way of calculating Direct Debit amount?

  • June 16, 2025
  • 126 replies
  • 3524 views

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126 replies

Firedog
Super User
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  • Super User
  • December 11, 2025

I’m retired, so my schedule does not change with the season. 
  

Me too.

  

OVO had 3 years of previous readings to check this usage.  They did not do so. 
  

Your FAC is based on ‘previous readings’. A customer who has three years’ worth of data from the same meter should have an FAC which accurately matches the actual consumption. This might not be the case for a new customer or a new meter until some months have passed.

My FAC changes weekly, so I get a new figure each Sunday morning. Knowing pretty well where the FAC comes from, I can predict on Friday what I’ll see on Sunday, within a few Wh. Here are December’s results:
  

Annual advance: difference between meter readings
on the same date this year and last
Grey crosses appear on Friday. Red crosses drop in on the following Sunday.

This shows that (a) we can work out where the FAC comes from, and (b) we can predict how it will change pretty accurately.