Speaking at the Euroscience Open Forum in Barcelona, Arnulf Jaeger-Walden of the European Commission's Institute for Energy, suggested a solar farm the size of Wales in the Sahara could meet all Europe's energy needs. A direct current cable would run the power into Europe.
The EC's plan, desopite support from Gordon Brown and Nicolas Sarkozy, is not as good as my plan, because mine has dual benefits - shade + power. And I have already got a country lined up for it - Chad.
Chad is the best country for a solar roof because its Northern half is horrible, mainly desert, and the locals mostly live in the Southern half.
So you roof over part of the Northern half. You don't even need all of the Northern half because this is a country the size of Peru stretching over half a million square miles.
In fact, only 30,000 square miles of Northern Chad need be roofed over, because a solar panel roof that size would generate about 20TeraWatts, which is more than the current average power requirement of the planet.
Another good reason for choosing Chad as the world's solar saviour, is that it's seventh from bottom in the international corruption league table, coming in just above Tonga, Uzbekistan, Haiti, Iraq, Myanmar and Somalia.
This means the rulers will do as they're paid to do, and will stop popular protestors invoking issues like preservation, ancient rights, traditional tribal lands etc to protect their shitty landscape.
Transmission? Direct current under the Med into Europe is the answer.