I am economy 7 plus day tariff. I have in recent months changed water heater system and as a result only have one wall heater on a fixed economy 7 connection. I therefore cannot therefore correctly estimate future use. Can use give any advise on this.
I think the best approach for you will be to take meter reads for the next few months and make sure we’re adding them to your account and billing you to them.
You will then get an idea of the new usage and can make the necessary changes to payments.