When electricity is supplied to consumers, there is some loss of energy when it travels from the power plants (i.e. the source of generation) via the transmission cables to homes and businesses. The amount of loss is dependent on the voltage level where consumers take in their electricity supply. In general, the lower the voltage, the more transmission losses are incurred when delivering electricity from where it is generated to where it is consumed. When retailers buy electricity from the wholesale market, they pay for the actual units of electricity generated. However, this quantity is higher than the recorded consumption registered on consumers' meters. As such, to account for the difference, retailers may apply a Transmission Loss Factor (TLF) to adjust the final consumption that they will use to bill consumers. The Transmission Loss Factor is calculated in accordance to a methodology approved by the Energy Market Authority. More details on Transmission Loss Factors can be found here.