Construction of the 11 megawatt Serpa solar power plant began in June 2006 and was completed as planned in January 2007, at the cost of 58 million euro. The facility is located in Serpa, in Portugal's Alentejo agricultural region, 200 kilometers (120 mi) southeast of Lisbon. The plant uses SunPower subsidiary PowerLight's PowerTracker system to follow the sun's daily path across the sky and generate more electricity than conventional fixed-mounted systems. The plant provides enough electricity to supply approximately 8,000 homes.