Alvarado I is large solar thermal power plant in Alvarado, in Extremadura, Spain. Construction on the plant commenced in December 2007 and was completed in July 2009, when commercial operations began. With an installed capacity of 50 MWe, it is one of the largest solar thermal power stations in the world.

The facility is built on a 1 km2 (0.4 sq mi) site with a solar resource of 2,174 KW·h/m3/year, producing an estimated 105,200 MW·h of electricity per year (an average power of 12 MW). The plant uses parabolic trough technology, and is made up of 768 solar thermal collectors, with an output temperature of 393 °C (739 °F), transferred with Biphenyl and Diphenyl oxide heat transfer agents.

A second 50 MWe facility, Alvarado II, is currently on the proposal stage. It is planned to be constructed in the same area as Alvarado I.

Alvarado I
Country Spain
Location Alvarado, Extremadura
Coordinates 38°49′37″N 06°49′34″W / 38.82694°N 6.82611°W / 38.82694; -6.82611Coordinates: 38°49′37″N 06°49′34″W / 38.82694°N 6.82611°W / 38.82694; -6.82611
Owner Acciona Energy
Status Operational
Fuel Solar thermal
Installed capacity 50 MWe
Annual generation 105,200 MW·h
Commissioned July 2009