Hey Darryl,
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.
Jeff Clearwater
NorthEast Solar/Village Power Design
Hello Darryl,
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.
Mostly this is a personnel opinion on the process and wanted to
relay my experiences.
On Tue, Nov 11, 2008 at 6:04 PM, Darryl Thayer
<<mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED]> wrote:
Hi all, I need advice
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.
Thanks Darryl
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Turnkey Solar Design & Installation for the Commercial Sector
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