Southern Cross Energy, in Australia, is 100 per cent owned by TransAlta and is made up of four simple-cycle power stations, each with one gas turbine. The stations are located in Kambalda, where TransAlta is a significant sponsor of the Kambalda Community Recreation Centre, as well as in Mt. Keith, Leinster and Kalgoorlie.

Simple-cycle power generation is often used for periods of peak usage, or to reinforce baseload power provided by other sources. BHP Billiton Nickel West uses most of the electricity generated by Southern Cross Energy in its area mining operations.