This is the talk I give about the topics in my book The Switch, to be published by Profile Books in late spring 2016. If I finish it on time.

In this presentation, I look at the probable future cost trends in solar PV, showing that this technology is likely to be the cheapest way of delivering energy almost everywhere within ten years. The problem is obvious: how do we supply energy when the sun isn't shining? I briefly look at the many alternative ways of supplementing and complementing PV around the world, hoping to show that storage and new technologies, such as Power2Gas, are capable of providing power when PV cannot.