L16 Universal Terminals [RE-wrenches]

[Bob Ellison]

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John,
That (round stub) is all we have ever had here. They will crush somewhat
easily. On some I have had to put an automotive clamp on the terminal.
As that was the only way to keep it tight after it starts to crush. They
have a bad habit of collapsing under load. Seems the thermal cycling
helps it collapse. They have gotten so silly in the pricing here that I
can't sell them anyway. Just too expensive, anymore.

Have a good evening,
Bob

 

-----Original Message-----
From: John Raynes [mailto:john at raynes.com] 
Sent: Tuesday, May 17, 2005 1:27 PM
To: RE-wrenches at topica.com
Subject: L16 Universal Terminals [RE-wrenches]

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Wrenches,

Have any of you had issues with the L16 batteries, with universal
terminal 
style?  We were surprised to find out recently that our only distributor
in 
Utah for Trojan Batteries was no longer stocking L16G's with the "L" 
terminal (LT).  They now only stock the "Universal" (UT) terminal.  If 
you're not familiar with this, the UT is a tapered round stub with a 
through hole, designed for either automotive style lugs, or through-bolt

connections.

I have some problems with the UT style terminal.  First, the recommended

torque rating isn't clear.  These are the current published torque
ratings, 
for all terminal style types, from Trojan's literature:

Automotive: 50-70 in-lbs
Side: 70-90 in-lbs
Wingnut: 95-105 in-lbs
LPT: 95-105 in-lbs
LT: 100-120 in-lbs

There is no direct torque spec for the UT.  The "Side" spec would appear
to 
correspond most closely to the UT in the configuration that we all use
it 
for RE systems, but I'm not 100% sure.  I've tried repeatedly to get a 
confirmation on this from Trojan with no success.  We like to torque our

connections as securely as allowable for the obvious reasons, but the UT

terminal will start to squish as you torque it using a side bolt, and
can 
crack under relatively light torque.  I'm not really that comfortable
even 
tightening them to the 70-90 range at this point.  The LT is far more 
robust and tolerant.

Our distrib will get L16's with the L Terminals at the same price, as
long 
as I order a pallet of 18.  Sometimes that will work for us, but that's
an 
odd number of batteries for a typical job.  So unless I have a group of 
jobs where I can move all of the L16's on a pallet or two, I will have
some 
sitting on the shelf.   I could order outside the state, but we're very 
remote and our Utah distributor does deliver for free, once every two 
weeks.  I really don't want to touch these UT terminals again if I can 
avoid it.  Any suggestions or insights?

Thanks,
John Raynes
RE Solar
Torrey UT
435-425-2110

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