Why is a prepaid meter recharge failing

Sometimes, your prepaid meter might not accept a recharge for a few reasons. It could be that the token (that's like a special code for your electricity) has been used before, or it's an invalid code. Also, if your meter and the main power company's system aren't talking to each other properly, it won't work. Sometimes, a \"key change token\" is needed to get them back in sync. Your meter might even lock out if too many appliances are drawing power at once, or if the meter's battery is low. In some cases, there might be a technical problem with the meter itself.