A charging system stores first RFID tag information of a platform account of a platform system at an account system of the charging system. responsive to reception of the first RFID tag information from a first RFID tag, an RFID reader provides the first RFID tag information to a power controller of the charging system. Responsive to reception of the first RFID tag information, a power controller of the charging system determines whether the first RFID tag information is authorized for the charging system by using the account system. Responsive to a determination that the first RFID tag information is authorized, the power controller controls a charging transmitter of the charging system to generate an electromagnetic field that is receivable by a charging receiver. The power controller meters power usage of the charging receiver for the first RFID tag information.