Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
I couldn't find a source with detailed stats, but it seems RES didn't invent the number, because Ireland's grid operator writes the following in its 2010 Annual Report:

However 2010 was a highly unusual year with a wind
capacity factor of 23%, significantly lower than the comparative figure of 29-31% over the previous 10 years.

*Lunatic*, n.
One whose delusions are out of fashion.
by DoDo on Thu Jun 23rd, 2011 at 01:09:01 PM EST
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