Best answer by woz
Welcome to PP and the community.
I guess it's a matter of perspective, you said "...was somewhat taken aback to discover that I will be charged 30 pounds more in the winter months than I will be in the summer ones" but you could equally have said ...I was pleased to discover that I will be charged 30 pounds less in the summer months than I will be in the winter ones!
I agree the Summer winter split doesn't suit everybody but the reasoning behind it is sound. The way most other energy companies work is to divide your annual usage by 12 and then the payment is the same every month, but this has disadvantages depending on where in the year you start because people always use more energy in the winter.
With other suppliers if you start at the beginning of summer you then build up a credit (the money sits in their account) and through the winter, you probably aren't paying enough and the credit you've built up (in their account) is slowly depleted. The converse is also true, you would be going into debt if you started at beginning of winter.
PP's system irons much of this out, you pay more when you use more. The split is 60% of your annual amount in the winter and 40% in the summer.
I admit it does make domestic budgeting more difficult if you're used to paying a fixed amount every month, but it's fairer.
You could ask for your direct debit to change twice a year, or you could put half of the difference between the winter and summer amounts into a separate account in the summer, and use it to pay the winter months..... or better still just leave it and over time it should work out OK if your estimated yearly use is fairly accurate.
If it's any consolation there have been a few comments about this, and maybe it's something that will be considered in the future, but equally most customers have adapted to this without problems.
As far as something cropping up to fill the void, that's not going to change whatever payment plan you use, if it's going to happen it's going to happen...
Good luck with whatever decision you make.