Last November Abengoa announced that it would buy out partner BrightSource Energy’s stake in the Palen power-tower project, which has changed hands numerous times over the years and been shrunk from its original 500MW, two-tower design.

Pushing back against the view that CSP has more or less run its course in the US, Seage says the prospect of California boosting its statewide renewables mandate to 50% by 2030 – a goal recently floated by California’s new governor – bodes well for CSP with storage in the US Southwest.

But