Best answer by woz
Yes, I suppose you could say that as you can't choose to pay 12 equal payments.
It really is a fairer system, most customers use more energy in the colder months, so on balance you get to keep your money rather than building up a bigger balance. The first of the 6 higher payments of your account is in October.
You pay your first payment at the start of the billing period (unless you change the date of the dd, which you can to at any time after you've paid the first one), this means at the point you pay you should expect to see around an average month's credit as your balance, BUT more to the point if youre balance goes way out of kilter either way (constantly increasing over many months or vice-versa) it's quick and easy to have your dd reviewed.
I suppose a simple yes would have sufficed...
Is it mandatory to pay more in winter and less in summer or can you choose to pay the same amount every month?