Well this is sorta off topic. I'm from the US and we just get a bill at the end of the month after we use our electric. do you have to prepay for electricity there. How does that work. Just a little curious.
We have three ways of doing it here. You pay after usage so quarterly, you can pay monthly in order to avoid the big bills or you can have a meter where you a card/key and take that to the shop you then pay however much you require and they put in a little machine, you go home with it and put it in your meter. It is a little more expensive that way but many people find it easier to manage putting a bit on each week than monthly/quarterly bills.