Reverse-mount 12V alternator

Dedicated to the memory and knowledge shared by Jim Mettler - All things relating to the flow of electrons in a Pinz.
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Re: Reverse-mount 12V alternator

Post by Sonarman » Sat Sep 07, 2019 8:12 pm

Are you going to sell the bracket?


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Re: Reverse-mount 12V alternator

Post by Texas710 » Mon Sep 09, 2019 9:39 am

Great job, I am sure a lot of people would be interested in purchasing one of these. I will be interested to see how it wears over time, but looking great

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Re: Reverse-mount 12V alternator

Post by kdiqq » Mon Sep 09, 2019 8:27 pm

Personally, probably not going to sell it. I have a ton of other projects going on right now and I'm not sure I could offer the support a product deserves.

That being said, I will likely license the product to be supported by another Pinz owner. Stay tuned for that. That should allow me enough time to shake the thing down and see if I run in to any reliability problems.
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Re: Reverse-mount 12V alternator

Post by Bumber » Tue Oct 15, 2019 1:24 pm

I haven't been on this forum in ages, so please forgive me if this has been covered ...

While running a second system you will find that one of your batteries is dragged down and beat unconscious. This, as I personally found, is due to the fact that everyone makes all their doodads and thingies to have a grounded frame. For example, my Warn 12V winch (running on 24V makes them much better) is running off a second set of Odyssey batteries placed in the second toolbox. One of the batteries went bad. After a lot of testing I found that the problem was that the winch is grounded, which was bolted to the winch mount, which was bolted to the truck. Even though there was a separate ground wire on the winch, the frame of the winch was grounding out. The solution was non-metallic washers and a sleeve over the shaft of the bolt to prevent the winch from grounding. I had a similar issue with my fog/spot lights. I had to use non-metallic washers and rubber grommets to isolate them from the light bar and prevent grounding. Once these isolation steps were taken, the battery levels remained constant. As best I can tell the ground was sneaking a little bit of electrons around the system to the factory batteries and giving them preference. In addition to all the isolation, I had a custom switch made that isolates the second set of batteries if the main batteries fall below 12.2V each (24.4V total) to prevent any ground leak from ever placing havoc with the main batteries. It works quite well, although I designed the switch slightly small. I put a lower amperage fuse in it and after using the winch for about 15 minutes to pull a friend's bushes out of the ground, the spare batteries get low and draw too much power from the alternator and the fuse pops. My solution was to hang a pack of fuses inside the box. But a better solution would have been to design the next switch with a 40 amp fuse. :)

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