Whoa, windfarms in UK operate well below advertised efficiency | Watts Up With That?

1. “Wind turbines will generate on average 30% of their rated capacity over a year.”

2. “The wind is always blowing somewhere.”

3. “Periods of widespread low wind are infrequent.”

4. “The probability of very low wind output coinciding with peak electricity demand is slight.”

5. “Pumped storage hydro can fill the generation gap during prolonged low wind periods.”

This analysis uses publicly available data for a 26 month period between November 2008 and December 2010 and the facts in respect of the above assertions are:

1. Average output from wind was 27.18% of metered capacity in 2009, 21.14% in 2010, and 24.08% between November 2008 and December 2010 inclusive.

Whoa, windfarms in UK operate well below advertised efficiency | Watts Up With That?