Every time I receive my account update the email reads that I have used certain amount of energy since the past month, my question is: how bulb knows how much I used if I don’t have a smart meter?
Via the meter readings you take manually and submit each month.
If you haven’t submitted any meter readings, then the energy supplier takes a guess, they call it an “estimate”, and it could vary between mostly correct and wildly inaccurate.
If you’ve never submitted a meter reading it would be advisable to do so now.
I send my meter readings every three months and the last was in December that’s why I was wondering why the email stating that was from January.
So in my case on the last 3 months my bill went up ± £30 so this can be just a guess
Your December bill was accurate.
Your January bill is a guess.
I’d strongly suggest submitting meter readings every month, despite what the email says about “another reading in 3 months will be fine to keep things shipshape”. It will NOT be fine.
Absolutely agree. Things could slip too far with once a quarter, especially the Winter one. R-