Best answer by Nancy_OVO
I've edited your title to make it a bit more "searchable" for other users.
Your annual consumption figures are absolutely taken into account when reviewing your Direct Debit. If you're using energy generated by your solar panels in the summer, and not relying on electricity from the grid, your annual total will naturally be lower than a household of the same size using appliances in the same way. This will be reflected when we assess your payments.
Tweaks to your Direct Debits aim to get your account to a balance of £0 by the time your conteact ends. If you think there's been a mistake or its not reflective of your usage, we're happy to discuss this. Send the team on Facebook a message with your account number, full name and DoB and they'll be able to investigate.