All of this article by Terry McCrann is worth reading, especially if the figures he gives for the amount of power wind is actually generating in Germany is correct:
On average across the year, the 7600 MW of installed wind capacity produced 1327MW. That's an operational level of 18 per cent of capacity. In rational terms, it's insanity.
Indeed as E.ON Netz notes, installed wind capacity went up 12 per cent in the year but actual wind power fed in to the grid went up just 1.5 per cent. Because of lower "wind availability".
The way you 'solve' this is that 'traditional' power stations with capacities equal to 90 per cent of the installed wind power capacity must be permanently on line to guarantee power supply.
So not only do you have to install six to seven times as much wind capacity as the output you will actually get, but you also have to build 'shadow' coal/gas/nuclear(?) as well.
That's one power station for the cost of 12 or so.
Did I say insanity? Unless you can build big enough batteries to store the power generated when the wind does blow.
Funny I should say that. E.ON has actually pioneered exactly such a battery. It's the size of four shipping containers, uses 'undisclosed' chemicals and can produce all of 1MW for four hours.
So not only do we have to have windmills blanketing the country-side, but millions of 'super-batteries' as well. Plus some new coal stations anyway.
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