A manual EAC review is exactly that just reviewing the data manually. We would use the actual readings on the account ideally over the last 12 months so we have a picture of summer/winter usage.
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We can also do a manual payment adequacy review on the account and adjust payments accordingly if the EAC/AQ is out by a lot compared to your actual usage. This is why you will see me harp on so much about providing actual readings rather than having it estimated as it makes so much of a difference when calculating accounts 😉
I recall a number of years ago when I was with Breeze Energy who wanted me to start increasing my DD amount more than I thought it needed to. I recall a converstion where I was able to tell them what I had used over the previous 12 months and the CS agreed to my request that the DD was set more in line with my actual usage. This was in the era of cheaper energy (although not that much so with payments being in the region of £75 pcm back in 2017). Two years later in 2019 they wanted to increase it to £79.84 but I beat them down to £76.50 mainly because I was in credit and I knew my energy consumption at my old address. At no point in my phone call to them was a request from me to redo the EAC calculation and then request that the Data Collector re-do the EAC calcs.
The only time this (DD adjustment) really comes up is when the 3 monthly payments review throws out an over-inflated DD amount (which is
based on the EAC rather than the AA (Annualised advance) and the customer rings up the energy to complain about the DD. At this point the CS can and will agree on a lower more realistic DD if they have readings approx 12 months apart. So roll on another 3 months or 6 months or whatever. The same thing now happens i.e the new EAC is still higher than the actual consumption and the DD is set too high again.
Why energy companies do not (as a rule) also quote the
Actual Annual Usage (i.e. use over previous 12 months) instead of EAC is beyond me particularly for those of us on smart meters. 🤔
It matters not to those of us on VDD but those on non-VDD payment tariffs can, and do, tear their hair out over this (and will continue to do so). 👍