If you look on page 16, one can see that German Solar- and Windfarms still generated over 80% of the average production even in their worst combined month:
http://www.ise.fraunhofer.de/de/down...ergie-2012.pdf
Interconnected Solar- and Windfarms in Europe (as opposed to just Germany) produce even more consistently, 100% renewable power is easily feasible with 10% to 20% of overbuilding of Solar- and Windpower (curtailing is also easy), considering the fact that the hydro capacity already lasts for 22 days (and hydro power capacity can be increased without building new dams):
European hydro capacity compared to the demand for electricity | Claverton Group
Also, electrifying the heating and hot water sector would add a lot of flexibility to the grid as storing heat energy is easy, cheap and 'charging' of a hot water tank can be done an unlimited number of times (as opposed to batteries).
https://commons.wikimedia.org/wiki/F...her_Theiss.JPG
A roof over a parking space can produce more power than the electric car underneath consumes in one year.
It is simply impossible to do the same with corn growing on a roof to produce ethanol...
I don't drive an electric car because they are currently still too expensive.
Also, I believe it makes more sense to electrify the heating and hot water sector first. One shouldn't waste expensively imported fossil fuels just to heat water.