What California will do after 2020, when its existing 33% RPS runs out, remains an open question.

Many in the renewables industry, and indeed many California politicians, would like to see the Golden State's RPS increased and extended – with 50% by 2030 a commonly mooted goal.

But Michael Picker, named commissioner of the powerful California Public Utilities Commission in January, believes the state will not ultimately move in that direction.

Before