As you know, I have been working mostly on the big, industrial-size renewable energy plants, i.e. big wind farms, so I don't follow PV that closely. I do know that Germany is a leader in that sector, and it's good to note this symbolic landmark.

PV is still a lot more expensive than wind (probably 5-10 times more exepnsive), but it won't get cheaper unless there is an incentive for producers to imrpove their stuff - and have places to sell it, so the countries that have special feed-in tariffs for PV that actually make it possible to make money from the investment (like Germany, Spain) are playing a big role in the early development of these technologies.

Good on Germany (and Japan) for pushing this doggedly.

(Note that despite these high costs, PV can make a lot of sense on individual houses and similar small scale installations where many other costs come into play, like the cost of connection to the grid)

In the long run, we're all dead. John Maynard Keynes