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Old 02-04-2018, 11:07 PM   #1
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Connecting an isolator to a 2-battery starting bank

Cheers!

I'm new here but have been reading for awhile. I have 1997 Ford e350 7.3L Super Duty.

My rig has the 2nd start battery mounted on the frame. I'm wondering if I can put my Blue Seas 7620 near to connect my house battery. Or should i connect it to the first battery?

Also, I want to mount 2 more golf cart batteries to the rail but cannot find any examples. Anyone seen them?

Thanks for any help!

Cheers
Bill
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Old 02-05-2018, 06:41 AM   #2
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I have mine hooked up to the frame battery with 2/0 wire and the 2 AGM house batteries are mounted inside behind the right rear tire
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Old 02-05-2018, 09:03 AM   #3
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Bill, you an run your BlueSea isolator off either battery but if you're adding house batteries it will certainly be easier to run it off the 2nd (frame mounted) battery you have already. There are lots of pics and info here of aux battery mounts.

http://www.sportsmobileforum.com/for...unt-18859.html

http://www.sportsmobileforum.com/for...e-15670-2.html

http://www.sportsmobileforum.com/for...ded-14842.html

http://www.sportsmobileforum.com/for...pics-8790.html

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Old 02-10-2018, 09:55 PM   #4
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Thanks for the replies. They moved me along.

I am going to mount the house battery on my rear UJOR skid plate for now.

Now I am wondering where I should mount the 7620. There are some holes on the frame I could attach it to. But that seems to exposed. I'm even wondering if it needs a housing to keep it dry and clean... even if I put it on the rear skid plate. Thoughts?

I also want to double check that I can connect the house battery negative to the frame.

thanks again for the help!
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Old 02-11-2018, 07:15 AM   #5
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Yes, negative to frame is fine. You'll find that's where your other one is grounded as well.

I don't personally like the idea of putting an isolator out in the weather. Blue Sea is well made marine stuff though so it might be fine. I'd check with them. I have put all the ones I've used either under the hood or inside but this was on rigs where that was convenient. Maybe you could put it in a weatherproof case with only holes for the wire in/out?

https://www.amazon.com/MTM-Survivor-...M9DWE0136&th=1
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Old 02-11-2018, 11:06 PM   #6
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Thanks Eric. I went for a plastic sandwich tupperware thingy. It will keep dry enough.

Cheers!
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Old 02-16-2018, 10:49 PM   #7
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Success! The House Battery is in and connected with a Blue Seas 7620.

Now I'm putting in a bumper light bar. I'm going to need to start a build thread... but first.

I need positive on the right side of the engine bay for my light which the other side as the battery. I noticed a hot post where the hot goes into the 'under the hood fuse box' or power distribution box. Can I connect to the that? I can't see a reason not to.

Thanks!
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Old 02-16-2018, 10:52 PM   #8
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My lights are 162W.. so like 13.5 amps.
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Old 02-16-2018, 10:59 PM   #9
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Here are some install pics.

The Basement


Up Close
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Old 02-17-2018, 12:54 AM   #10
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Put a drain hole in the very bottom of that container. That way, in case it does somehow fill up with water, or ATF, the separator won't sit in it forever.
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