Does anybody happen to understand the calculation methodology for Estimated Annual Consumption (EAC) figures? Or failing that can anybody suggest a good place to ask?

I'm looking for a concise explanation of the process involved and the sources of the data so ideally I can reproduce the calculation for our house for myself.

edit: Just to be clear I'm talking about the 'industry standard' process used by suppliers rather than the simple sums used by comparison sites etc.

I thought that too, but don't overestimate their actual competence.

We have a separate electric meter on a supply to a disused outbuilding, which has nearly zero consumption. One supplier insisted on using the same EAC for it as for all the other supplies to houses in our postcode.

We also switched our house to some electric heating a few years ago, which has put up our consumption and changed the summer/winter balance. That supplier is gradually getting used to this and trying to tweak the direct debit. I try to help by paying the exact amount each month so as not to run up any credit.

The supply companies seem to just conjur figures as they see fit. I have two meters that are for landlord supplies, so tv amplifier, fire alarm and common area lighting, both have been with the same ( but different ) suppliers for around 20 years, consumption has been nigh on a flatline over that time aside from a drop when lighting changed to LED’s , but every time either company wanted to change the direct debit there would be a huge increase in “calculated” use. Any ability to actually look at historic use is seemingly beyond them, as is the a grasp of reading, i’ll get phone calls asking me to give a reading and they’ll wait whilst i do it, when i ask them what the supply relates to they’ll happily say “landlord supply at xxx” i then ask what is the corrspondence address and they’ll reply “yyyyy” , when you then ask why they think i’ll be at the supply adress there’s just a silence of complete incomprehension.

Posted By: djha sample of homes in every area and a categorisation of the meters into classes and ... lots of other stuff

So without access to all that, what makes you think you'll be able to reproduce the calculation?

Do the supply companies have access to a sample of homes in every area? What if I'm their only customer in my area?

The overwhelming feedback you received was that the companies are picking almost-random numbers based slightly on historical usage.

Good luck with that, then.

Edit to add a smiley face: :-)

Posted By: philedgeNo idea if this is correct or just BS

Yup, that description approximately matches what I know so far, and I'd like to know more. Presumably the policy didn't come down on tablets of stone and there was discussion and a record of what was agreed somewhere, but I haven't managed to find the Executive Summary of that agreement anywhere yet.