> -----Original Message-----
> From: piclist-bounces@mit.edu On Behalf Of David VanHorn
> Sent: Tuesday, August 22, 2006 3:04 PM
> 
> Before this gets into a descussion of damped oscillations in 
> mamilliary tissues, What I was really wondering about, is how those who 
> use solar cells deal with hail threats.
> 
> I've seen what hail can do up close and personal, with 3-4 
> inch hail balls at 100 miles/hr.
> The storm we had in oakville would have made very short work 
> of any solar array.
> I know you could put a lexan overlay on, but that of course 
> will cost output all the time, and scratch/haze etc over time.

Not sure how they do it on large arrays but, for small arrays like on small
instruments the best material I've found is a special polyurethane resin
from Development Associates, Inc. http://www.daius.com/.

It is used on the mini-panels manufactured by Sol-Lite Manufacturing Company
Ltd. http://www.sol-lite.com/

Paul  

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