I have edited my previous post. For Solar power in Germany, in 2010 it was 11.729 TWh, in 2012 it was 28 TWh.

The Liberose Photovoltaic Park (which is not their largest, but has more easy stats available), can allegedly produce 0.053 TWh, which according to what I can find, uses 2.2km^2 of land.

Or 41.5km^2 per TWh, much better than wind power, but would still need to blanket half the country's land mass to produce the amount of energy they consume. Though their it's not a complete dead end like wind power.

Solar can be embedded in windows of high rise buildings and the like.