Thanks for answering. Think, I would have to say sorry for not using Italian in an italian forum. I am learning Italian, but I am now I am only at "capitolo quattro".
Well-Tremonti is surely a very good minister of finance - I like it especially how he acts against Switzerland.
Two links to the case (one time Czech Republik an one time Spain)
Google Übersetzer Google Übersetzer
I suppose that the spanish way would be unconstitutional in Germany but the czech way to punish PV- investors in Germany would be theoretically possible but rather unlikeley because of the political constellation.
Question: How much of the feed-in tarrif would you think could be adequate for an owner of a roof? 10 percent of the income?