For a long time, the holy grail of solar photovoltaics (PV) has been "grid parity," the point at which it would be as cheap to generate one's own solar electricity as it is to buy electricity from the grid. And that is indeed an important market milestone, being achieved now in many places around the world. But recently it has become clear that PV is set to go beyond grid parity and become the cheapest way to generate electricity. Whenever I say this I encounter incredulity, even vehement opposition, from friends and foes of renewable energy alike. Apparently, knowledge of …

There are many reasons to move to a sustainable energy system: fossil fuel supplies getting tighter, easy oil increasingly having to be replaced by uneasy oil, accelerating climate change. And most indications are that we'll have to go there as soon as possible. But is it possible? And when? At Ecofys, we've been working for 25 years on our mission: "a sustainable energy supply for everyone." Two years ago, we figured it was about time to bring all our experts together to find out whether that really makes sense. Excited by our first findings, we found WWF willing to commission …