Nth Power successfully exited its investment in Capstone through an IPO. Capstone Turbine Corporation (CPST) is the leader in ultra-low-emission, high-reliability microturbine systems. In 1998, Capstone was the first to offer commercial power products utilizing microturbine technology, the result of more than 10 years of focused research and more than 100,000 hours of real-world testing. Capstone MicroTurbine systems are in operation worldwide.