We were driving along the North Wales coast and I spotted this enormous offshore wind farm. I looked it up and it seems to be three wind farms that merge into one. http://en.wikipedia.org/wiki/List_of_offshore_wind_farms_in_the_Irish_Sea I'd have said up to 200 turbines by inspection yesterday but the list doesn't back that up. The quoted capacity would be240MW which is about half of that of Wllfa nuclear power station. However I also found something called a "capacity factor" which is roughly what fraction of the stated capacity they produce on average. If capacity factor is about 0.33, then 80MW would be a more realistic figure.