The thermal energy storage system of one of Europe's first parabolic trough power plant, Andasol 1, has been successfully put into operation by Solar Millennium. The commissioning of the storage system and the turbine, along with the feeding of electricity into Spain's grid (on a test basis) will follow within the coming days. In a few weeks, Andasol 1 will then go into regular operation.

The heat generated in the solar field will be stored in a molten mixture of 60% sodium nitrate and 40% potassium nitrate.