The PS20 solar tower plant sits at Sanlucar la Mayor outside Seville, Spain. The solar tower plant, the first commercial solar tower in the world, by the Spanish company Solucar (Abengoa), can provide electricity for up to 6,000 homes. Solucar (Abengoa) plans to build a total of 9 solar towers over the next 7 years to provide electricity for an estimated 180,000 homes.