I have just received my first solar bill and am working my way through it. It’s a little confusing as part of the billing period is split over two rate plans, but I have a question. I supply the grid far more than I use and it’s obvious that I will generally have a credit balance. My question is this: I have been charged a ‘Visa card payment fee’ on the debits before the accrued credits have been applied. My card was never debited, no transaction took place. Why the charge?