German Installed Solar PV Under $2.30 a Watt

According to Germans, installed solar PV in Germany now costs under $2.30 a watt.  That's pretty damn cheap.  For most Australians solar at that cost would provide electricity at about, um... Now what's that economic rule of thumb Ned Kelly taught me?  Oh yeah, 10% of the initial cost of the system to account for capital costs and depreciation, divided by kilowatt-hours produced per year.  That gives a cost of about 13 cents per kilowatt-hour for most Australians, or roughly half of what Australians currently pay.  It is obvious that Australia is going to get a large chunk of its electricity from solar in the not very distant future and I am continually surprised by the large number of people who don't seem to realise this.