Last week, attorneys for the company made known the proposed change in technology in a letter to the California Energy Commission (CEC), Michael Ward, a CEC spokesman, tells Recharge.

The CEC on 15 December 2010 had approved original developer Solar Millenium's use of trough technology for a proposed 500MW project, and gave it five years to begin construction.

Millenium filed for bankruptcy in December 2011 and Oakland-based neighbor BrightSource Energy acquired project development rights in June 2012.