How often do EDF produce a bill?
I have found that several companies have long billing periods of three or even six months, meaning that they only 'do the maths' properly at the end of those periods.
Between times, that leads to customers being given a very misleading picture of how much - or little - credit they really have.
What often seems to happen is that their account will show all payments received since the last bill as credit, but no deductions have been made at this stage for the cost of the energy used in that same period. As you can imagine, over the winter months, when usage is at its highest, this can be particularly misleading.
The accurate picture only emerges when the latest bill is produced.
I have seen this with my mum's energy account (with British Gas, not EDF), which I monitor for her.
There was one point in Feb when she asked me to see how much credit she had. Her online account was showing that she had credit of over £1,500. She instantly wanted me to arrange for it to be refunded (apparently a lot of her friends had recently asked for credit refunds). However, I did the maths myself and realized that when the next bill, due around that time, come through, the credit would drop to more like £500.
I was right - literally overnight, around £1,000 of her credit 'disappeared.' as the new bill was produced
Why do some companies do this, or are even allowed to do it? It just seems crazy to me.