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Old 08-28-2016, 08:02 PM   #29
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Painless Group 27 Battery Installation

One more thing........

REPLACE THOSE WING NUTS!!!!!!

ABYC limits wing nut use to a maximum of 8 AWG for trolling motors. Stainless flange nuts will work extremely well in this application.


Lew Farber
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Old 08-28-2016, 10:24 PM   #30
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Great advice, thanks! I have those too, will do. The wing nuts were making me nervous anyway.
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Old 08-29-2016, 01:35 AM   #31
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OK folks,

Due to a comment that I made in another thread about a painless way to put a pair of group 27 batteries into Airstream's tongue mounted battery box, I decided to post a photo of an upgrade that I just finished. Don't know if anyone has posted this before, but it was one of those 'OMG' moments when it hit me a couple of days ago.

No more cutting, painting or sweating it.

Just look at the photo below and all will be revealed....

In fact, the threaded rod and spin-on retainer still work as there is room to move the batteries fore and aft against their respective walls, leaving enough space to replace the rod.

Hi, I have seen a few pictures of this installation of group 27 batteries. I'm concerned about massive arcing during the placing of the batteries in the box. Would / could it be better to install the batteries with the posts facing inward, instead of outward like in your picture?
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Old 08-29-2016, 12:06 PM   #32
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Updated photo showing a cleaner wiring design that leaves the batteries accessible for checking and adding distilled water as needed.

Also switched to those flange nuts for the bolt terminals that Lewster recommended. Much better, as it's not possible to get wing nuts tight enough to secure big cables.

I added a flange to help the retainer bolt hold the batteries in place while distributing the pressure across more than just a bit of the shoulder of each battery. Looks better to me now.

I imagine one could install the batteries with terminals more to the center if desired. This orientation, however, allowed me to use the existing house wires without inventing any new 4-letter words. (The length of a couple of the cables was quite limited.)

I experienced zero risk of, or actual, arcing of any kind when dropping the batteries into the case as shown. Also none while wiring, as I used due care.

If you're not comfortable doing this, you are free to take another approach. No need to armchair quarterback. Also, please remember a photo is always a 2D rendering of a 3D environment and can be deceiving.

Click image for larger version

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Old 08-29-2016, 12:51 PM   #33
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I will be producing a mid kit for the 220 amp/hour golf cart batteries as soon as I get back to OR this summer. Watch the classifieds!!!!

The riser will not allow for full opening of the front storage door on larger FBs. I usually mount batteries under the bed in those coaches, as try are either Lifeline of lithiums.


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Lew, I would be interested in this kit, do you have any ?
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Old 08-29-2016, 02:55 PM   #34
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Vinnie, of Vinnie's Northbay Airstream Repair, also sells battery box extenders, in case Lew doesn't have any: http://www.vinniesairstream.com/part...ndealerid3366/ or https://www.facebook.com/VinniesNort...04542062955224 to get a look at them.

Not affiliated with Vinnie in any way, just sharing info.
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