PS10 is the world's first commercial solar tower power plant.   In the heart of Andalusia the PS10 is the world's first commercial solar tower power plant. The 11 megawatt PS10 solar power plant will generate 24.3 GW/hr per year of clean energy and comprises 624 movable heliostats (mirrors). Each of the mirrors has a surface area of 120 square meters (1292 square feet) which concentrates the Sun's rays to the top of a 115-meter (377 foot) high tower where the solar receiver and a steam turbine are located. The turbine drives a generator, producing electricity. The two axis heliostats move automatically as a function of the solar calendar. This power plant alone will prevent the emission of 18,000 tons of CO2 per year.