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Unread 10-16-2011, 01:21 PM   #21
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Default Re: Check your battery terminals

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Originally Posted by Stevegrmich View Post
Wonder if the 5/16" threaded rod/stud creates a "hot spot" of resistance going from 2g to 5/16" and back to 2g cable . . . anyone check it with a temp gun yet after a "scoot about"?
Good question!

I think that a 5/16th pure copper stud has less resistance than 2 gage wires, so it might create a cool spot

Any electrical engineers here to chime in?

I do know many folks are using stainless steel and that works. Copper can only be better
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Unread 10-16-2011, 02:57 PM   #22
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Default Re: Check your battery terminals

I can do that
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Unread 10-16-2011, 07:16 PM   #23
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Default Re: Check your battery terminals

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No. You can't bypass the OBC, because your charger needs it to charge batteries.
I want bigger wires for my future bigger controller. The problem is the bigger wire will not fit through the tight little hole in the OBC. So I'm going to fabricate a 3" x 5/16th threaded copper stud, and put that through the OBC. Then I'll connect the battery cables to that stud.

I learned about this from David Hicks, but he used stainless steel I believe.
Does this have to go through the OBC? Can you make a different access hole? I'm new so I'm learning
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Unread 10-16-2011, 08:13 PM   #24
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Default Re: Check your battery terminals

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Originally Posted by Stevec3201 View Post
No. You can't bypass the OBC, because your charger needs it to charge batteries.
I want bigger wires for my future bigger controller. The problem is the bigger wire will not fit through the tight little hole in the OBC. So I'm going to fabricate a 3" x 5/16th threaded copper stud, and put that through the OBC. Then I'll connect the battery cables to that stud.

I learned about this from David Hicks, but he used stainless steel I believe.
I may be missing something here, but can't you just buzz your hole with a dremel and get a larger grommet? Easier, faster, a lot cheaper!
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Unread 10-16-2011, 08:43 PM   #25
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Default Re: Check your battery terminals

NO you can NOT make the hole bigger in the OBC ---------- WARNING
You will need a new OBC if you do
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Unread 10-16-2011, 08:48 PM   #26
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Default Re: Check your battery terminals

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NO you can NOT make the hole bigger in the OBC ---------- WARNING
You will need a new OBC if you do
Does the neg cable just pass through it?
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Unread 10-16-2011, 08:50 PM   #27
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Default Re: Check your battery terminals

Yes it does, but you can not drill the hole out bigger in the OBC with out destroying the OBC
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Unread 10-16-2011, 08:54 PM   #28
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Default Re: Check your battery terminals

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Yes it does, but you can not drill the hole out bigger in the OBC with out destroying the OBC
Couldn't just drill a different hole somewhere else and use a grommet and pass the cable through there? Why does it go through or have to go through the OBC?
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Unread 10-16-2011, 09:43 PM   #29
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Default Re: Check your battery terminals

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Couldn't just drill a different hole somewhere else and use a grommet and pass the cable through there? Why does it go through or have to go through the OBC?
That hole is a sensor. The OBC measures battery pack voltage there and controls the charger with that info. Your wire has to pass through it. Another method is to leave your existing 6 gage cable in place and route your bigger cable around the OBC. I don't like that because it makes for clutter.
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Unread 10-16-2011, 09:59 PM   #30
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Default Re: Check your battery terminals

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Originally Posted by Stevec3201 View Post
That hole is a sensor. The OBC measures battery pack voltage there and controls the charger with that info. Your wire has to pass through it. Another method is to leave your existing 6 gage cable in place and route your bigger cable around the OBC. I don't like that because it makes for clutter.
So its a magnetic pickup that reads current through the neg cable?
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