On Mon, 15 Oct 2007 20:06:53 +0100
John Rumm wrote:

Steve O'Hara-Smith wrote:

You're lucky to get 9m/s anywhere never mind 12 ! About 5-6m/s in much
of the South East from when I looked at it last week.
Which brings you power down to 5kW tops - so only a 140 year payback...

A 5kW average for 24 hours a day delivers about 44000 kWhr per
year
- Call it £4000 per year of electricity. I make that about 9 years, long
but not too painful.

24 hrs a day, you would be lucky! I wonder what it costs to service a
£35k turbine?

Not enough to push that 9 years to 140 I think.

Remember you also need to pay for grid capacity to cope with when there
is no (appropriate) wind.

I'm just assuming you cost all the electricity it produces at
10p/kWhr. I agree a wind turbine on this scale is not a great deal, but
it's not as bad as some people have been making it seem.

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