Date: Wed, 10 Oct 2001 14:12:26 From: "neil barnes" <[EMAIL PROTECTED]> Subject: Re: [LIBRETTO] Raymond's Solar Reply
> >There exist bike mountable units which could supply as much > >as 20 Watts at 15 Volts in direct sunlight. > >Yes, in DIRECT sunlight. Those claims vary wildly - you'd do well to >actually try it out because I doubt you'll constantly have full summer sun >falling onto that thing. Take their claims with a very large grain of salt >- a bit like laptop battery life claims ;-) > Solar energy outside the atmosphere as around 1300W/m^2, around 50% of this makes it to sea level. Efficiencies of solar cells seem to top out at around 25% - so you'd need an area of around 0.12m^2 at the equator, at noon...probably four times that to have any chance of making enough energy at other latitudes/times of day - this is in danger of becoming a wing :) Neil _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp ************************************************************** http://libretto.basiclink.com - Libretto mailing list http://libretto.basiclink.com/archive - Archives http://www.picante.com/~gtaylor/portable/faq.html - FAQ -------TO UNSUBSCRIBE------- Reply to any of the list messages. The reply mail should be addressed to: [EMAIL PROTECTED] - Then replace any text on the message's subject line: cmd:unsubscribe --------TO UNSUBSCRIBE DIGEST------ Do above but with this on subject line: cmd:unsubscribe digest **************************************************************
