The SGT5-8000H was the very first air-cooled H-class gas turbine on the market. More than 1 million fired hours of operational experience make it the most reliable and tested H-class gas turbine technology available today. With a power output of 450 MW in simple cycle, or 665 MW in combined cycle operation, and a combined cycle efficiency of 61%, it is among the most efficient and powerful gas turbines in commercial operation, with low operating and lifecycle costs.