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The PS10 solar power plant at Sanlucar la Mayor outside Seville. The solar power tower, the first commercial solar tower in the world, run by the Spanish company Solucar (Abengoa), can provide electricity for up to 6,000 homes. 624 heliostats (movable mirrors) concentrate the sun's rays to the top of a 115m high tower where a solar receiver and a steam turbine are located. Solucar (Abengoa) plans to build a total of nine solar towers over the next seven years to provide electricity for an estimated 180,000 homes.