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wrench</title></head><body>
<div>Hey Darryl,</div>
<div><br></div>
<div>I agree with Jason. We've done some commercial S5 systems
and we pre-tighten with a cordless driver and then two guys follow
with a couple of manual torque wrenches - it takes but a few
seconds to turn the final 1/2 turn to the right torque - felt and
confirmed by human feel and eyes. We used digital beeping torque
wrenches for a while but they would eventually fail. Our tool of
choice now is a 1/4" drive hand held good - ole "click"
type torque wrench. Worth the very little bit of extra time in
my book to know it's done right.</div>
<div><br></div>
<div>Jeff Clearwater</div>
<div>NorthEast Solar/Village Power Design</div>
<div><br></div>
<div><br></div>
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<blockquote type="cite" cite>Hello Darryl,<br>
I am a big fan of manually tightening all bolts and panel clips on any
array. I have done this on a MW tracker and racking systems on
schools, which were checked by a special inspector who required them
to be hand torqued and yes it's a lot, but in many peoples minds hand
tightened is worth it. I do know folks who use a cordless drill and
turn the setting down so as not to strip bolts and then go through and
torque by hand.<br>
<br>
Mostly this is a personnel opinion on the process and wanted to relay
my experiences.<br>
<br>
</blockquote>
<blockquote type="cite" cite>On Tue, Nov 11, 2008 at 6:04 PM, Darryl
Thayer <<a
href="mailto:daryl_solar@yahoo.com">daryl_solar@yahoo.com</a>>
wrote:<br>
<blockquote>Hi all, I need advice<br>
I am soon starting a 1000 module system, uning top down mounts, What
power tools will tighten to torque specification? I will want to
tighten each SS 1/4" nut on bolt to proper specs. This is
about 2000 bolts, so i want a power tool, either air or battery
electric, or electric that will tighten to specification.<br>
<br>
Thanks Darryl<br>
<br>
<br>
<br>
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<blockquote type="cite" cite><br>
<br>
<br>
--<br>
Jason Lombard<br>
Open Hand Solar LLC.<br>
HC74 Box13<br>
Pecos, NM. 87552<br>
505 795 8646</blockquote>
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<div>~~~~~~~~~~~~~<br>
Jeff Clearwater<br>
Senior Design Engineer<br>
NABCEP (tm) Certified Solar PV Installer<br>
http://www.nabcep.org/<br>
Village Power Design<br>
Turnkey Solar Design & Installation for the Commercial Sector<br>
http://www.villagepower.com<br>
gosolar@villagepower.com<br>
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Voice: 413-259-3776<br>
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