Nick wrote:
(about house-top wind powered generators)
So for £1000 capital outlay and a further £1000 for the inverter (£2000) he
produces some 600 KwH per year at say 7p per KwH which is £42 worth of
electricity a year which is only (2000/42) 47 YEARS to just break even,
assuming no maintenance and other problems.....

I'd noted that, also...

Is it any wonder why there is not a rush to
do this on economic grounds ?

Is it viable on resource grounds? How much energy and resource does it
take to make one of these things?