Tenaga Nasional Bhd (KL:TENAGA) said the automatic fuel adjustment (AFA) for October has been set at a rebate of 6.5 sen per kWh, compared with 1.10 sen per kWh in September, according to the utility giant's website. The AFA, introduced by the Energy Commission in July, provides monthly adjustments to electricity tariffs based on preceding fuel costs such as gas and coal used in power plants as well as exchange rates. It replaces the Imbalance Cost Pass-Through (ICPT), which was adjusted every six months.