Tutuka power station GM Sello Mametja is hopeful Eskom will be able to improve the energy availability factor (EAF) of the power station, near Standerton, Mpumalanga, above 70% by June next year. Mametja took over as GM of the power station nine months ago and told media during a site tour on November 18 that Tutuka was the worst-performing of Eskom’s power stations, with an EAF of only 34%.