The Hatch Solar Energy Center is a 5 MWpconcentrated photovoltaics power station, the largest in North America when it was completed, in 2011. It was built by Blattner Energy using 84 dual axis Amonix 7700 panels each of which contains 7,560 fresnel lens to concentrate sunlight 500 times, and multijunction photovoltaic cells, allowing a greater efficiency than other photovoltaic power plants. It uses all three of the methods available to increase efficiency - dual-axis tracking, concentrating photovoltaics, and multijunction cells. The systems are certified for operation for 50 years, but the multijunction cells will need to be replaced in 25 years. The output is being sold to El Paso Electric, under a 25 year power purchase agreement (PPA). Output is expected to be 11,000 MWh/year.