The power range varies from 1 megawatt up to 50 megawatts. This segment also owns a 51 megawatt cogeneration power plant. Estonia imports 200 thousand megawatt hours of electricity annually. The Tuticorin Thermal Power Station has five 210 megawatt generators. In July 2010 Pocono Raceway began the installation of a 3 megawatt solar photovoltaics system. The Seventh Five-Year Plan called for constructing two additional 600- megawatt reactors at Qinshan. Arrays that approach or exceed one megawatt often use solar trackers. The model's output is kilogram of CO produced per Megawatt hour of delivered energy. At the time a megawatt per year in energy consumption cost about 1 million dollar. Approximately outlay is needed for generation of one megawatt thermal power. The megawatt (MW) is equal to one million (10) watts. It is the electric output of a power plant in megawatt. Chemical lasers can reach continuous wave output with power reaching to megawatt levels. They generate a total of 330 megawatt. The design power level of one megawatt (MW) was attained in February 1953.