I understand your point about the difference between the mean and media installation size, however, the numbers just don't add up.  In order for what you say to be true, there would have to be several large installations and tens of thousands of installations there are smaller than the size of an average household panel.

Ok,  there are 3729 MW of solar PV potential in Spain as of the end of 2009.  536 MW of those are in installations larger than 20 MW. Another 42 MW larger than 1 MW are identifiable. We know that there are at least 100,000 installation. And we can identify 578 MW (15.5%) that are larger than 1 MW.

It's clear that smaller installations are producing the majority of the power. I'm extrapolating from figures here.  I really wish that we had hard statistics, but the PV association hasn't been as good as the wind sector in Spain about that.

PV has good uses in specialized small scale functions away from the grid, like street lights on highways, etc.  But it is not, and never will be, something that's going to make economic sense for large scale installations.  Thermo solar and wind have huge advantages there.

And I'll give my consent to any government that does not deny a man a living wage-Billy Bragg