> How many 50 watt panels do you need... <
 
It just stated the production and installation of each 50 watt unit costs were recouped in 2 years( used in South Africa ), leaving another 15 to 18 years of useful life before degrading became to great. I think this was the link I found.  http://www.scienceinafrica.co.za/2004/november/energy.htm       Chris.
 
 
Wessex Ferret Club
www.wessexferretclub.co.uk
 
 
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