Wrenches,
UL1703 requires solar modules withstand a 5 ft-lb (6.78 J) impact from a
2-in (51-mm) steel ball weighing 1.18 lb (535 g) falling through a distance
of 51 in (1.295 m). Many years ago someone (perhaps at Arco Solar in the
early 1980s?) said that this force was equal to a golf ball or a 1-in steel
ball traveling at terminal velocity or 54 miles per hour. Since then, I have
seen modules broken by thrown stones, stones dropped by crows (go figure?),
falling ice, hail, bullets, branches, school locker combination locks,
reported meteorites, etc. I have also seen modules withstand hurricanes,
stones, hail, ice, branches, etc.
Max's broken module has me questioning just how strong are tempered glass
modules. Granted, a driven golf ball has a greater impact than a lobbed
ball, but is it unusual for a golf ball to break a solar module or is it a
pretty sure thing? The reason I ask is because more resorts and people with
homes near golf courses are interested in PV.
Thanks in advance for sharing your knowledge and experience.
Joel Davidson
----- Original Message -----
From: "Max Balchowsky" <[email protected]>
To: "RE-wrenches" <[email protected]>
Sent: Wednesday, February 24, 2010 5:38 PM
Subject: Re: [RE-wrenches] Need NT185U1 Sharp module
Need to replace a module damaged by a golf ball strike, NT185U1. Anyone
know where I can find one, I know sharp has a NT175 U1 mono in the same
frame size, but I'd like to find a 185 somewhere..........
Thanks,
Max Balchowsky
SEE Systems
1436 Irvine Ave
Newport Beach, Ca.92660
760-403-6810
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