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Old Aug 19, 2007 | 12:35 PM
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Adding aux batteries...

I'm trying to come up with a way to add 2 or 3 deep cycle batteries to the truck to run an inverter. I'm thinking I'd like the batteries frame mounted between the frame and the bed (outboard), but the problem is getting access to them for cables, maintenance, etc. I have found this, but I wonder if any of you fabrication geniuses out there have found other solutions. Thanks in advance!

 
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Old Aug 19, 2007 | 12:48 PM
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Can you fabricate a drop down tray, something along the lines of the spare tire carrier?
 
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Old Aug 19, 2007 | 01:02 PM
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Any links to the spare tire mechanism? I haven't looked closely at it, so I wonder if it could be adapted. hmmmm...
 
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Old Aug 19, 2007 | 01:34 PM
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I found this link that looks interesting. A spare tire winch and an angle iron frame may work. Any thoughts?
 
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Old Aug 19, 2007 | 02:01 PM
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I took some 1.5" 1/4" angle and made a tray with some support braces, then welded it to the frame. Couple feet in front of the p/s rear tire. I think there would be room for two or maybe even three yellow tops if you squeezed them in. If your going to run a high watt inverter, I would recommend running a battery isolator also. So you wouldn't strain your engine batteries at all. If you do everything right and use a good battery protective, I don't see the need for any maintenance. I bought the batteries with the wing nuts on them, so I wouldn't have to deal with using a wrench up in there.
 
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Old Aug 19, 2007 | 02:07 PM
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I just looked under my truck and there is room for at least two. If your not comfortable welding I'm sure a metal fab shop could make something better and cheaper then you could buy.
 
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Old Aug 19, 2007 | 03:21 PM
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Roger that on the isolator. I intend to use one, along with some 1/0 cable to the alternator. I upgraded the alternator to a 200 amp heavy duty big case job so I have plenty of juice. Also have the BCP hooked up to the upfitter switch. I will use Romex from the inverter to a weather proof (GFCI?) box in the bed. Could I just bolt it up instead of welding? With my luck I'd weld it then have to grind it back out for some reason. I could assemble the batteries, inverter and cables on the ground then jack it into position and bolt it in. Thoughts?
 
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Old Aug 19, 2007 | 06:45 PM
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It would be good if you have the battery box welded together, then maybe use some 1/2" bolts and snug it to the frame, plus I guess you won't have to deal with removing the frame undercoating to weld on it. That was a mess. I do prefer welding myself, because then you know it's not going anywhere, and you'll have quite a bit of weight under there. To get three batteries in there, I think they'll have to be mounted with the short sides against the frame.

What kind of use is this outlet going to get? How many amps? I've been looking at making a setup like this to try and run some 10 amp stuff of it on another guys truck.
 
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Old Aug 19, 2007 | 06:57 PM
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by the time you buy 3 deep cycle bats IMO you may as well go ahead and get a generator and mount it in the bed, then you can run anything you want. My 5500w Generac will even run my 220v Lincoln Mig. and that is a lot of juice. Is there a reason you would prefer extra batteries over generated power?
 
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Old Aug 19, 2007 | 07:21 PM
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That's true about the generator, but my whole idea is to get stuff out of the bed. If I don't bite the bullet and upgrade to a TowBoss, I may put a 5er hitch in, and that takes a lot of room in the short bed. I also have an idea to mount a continuous duty rated 12v air compressor and 5 gal volume tank frame mounted on the other side, with a quick connect mounted in the bed, again with the idea of getting stuff out of the bed. My purpose is to just be able to run power tools, air tools, etc. while on the road or boondocking. No huge loads.

Edit - Yes, I didn't complete my thought about bolting it up, buy I did intend to weld up the tray with flanges against the frame to hopefully utilize existing holes to bolt to the frame.
 

Last edited by DeepDoc1; Aug 19, 2007 at 07:34 PM.
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Old Aug 19, 2007 | 07:33 PM
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I think it may have been rwilimo.. he modified a Ford E350 battery box to mount to his F-series.. The E350 box is very similar to the one you posted the link to and retails for $50 from Ford. I added one to an E350 that I owned years ago(direct bolt on) and it was real nice. adding that to the truck would be pretty sweet.

-Jay

Link: https://www.ford-trucks.com/forums/4...dual+batteries
 

Last edited by CyberJay; Aug 19, 2007 at 07:41 PM.
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Old Aug 19, 2007 | 08:34 PM
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If you're going to use Optima batteries, you can mount them on their sides. This makes it easier to tuck them up closer to the floor pan and still get to the terminals.

Where are you going to mount the inverter? The big ones generate a bit of heat and generally have built in cooling fans so you need to consider where you're going to mount it.
 
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Old Aug 19, 2007 | 09:15 PM
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Optimas or other gel cell batteries with side posts are my preference.

The plan is to weld inverter mount points right to the battery frame. I'm thinking of a small plastic tool box or such to keep it dry, or a sheet metal shroud, and add some vent holes as needed. I'll most likely use a 2 or 3kw inverter. I could even get fancy and put a digital ac/dv volt meter in the outlet box.
 
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Old Aug 19, 2007 | 09:42 PM
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Originally Posted by CyberJay
I think it may have been rwilimo.. he modified a Ford E350 battery box to mount to his F-series.. The E350 box is very similar to the one you posted the link to and retails for $50 from Ford. I added one to an E350 that I owned years ago(direct bolt on) and it was real nice. adding that to the truck would be pretty sweet.

-Jay

Link: https://www.ford-trucks.com/forums/4...dual+batteries
That's a good thread, I didn't see it in my earlier searches. I may do the parallel cable runs and use a switch so I could use them to start the truck in an emergency.
 
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Old Aug 20, 2007 | 06:41 AM
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Originally Posted by DeepDoc1
Optimas or other gel cell batteries with side posts are my preference.

The plan is to weld inverter mount points right to the battery frame. I'm thinking of a small plastic tool box or such to keep it dry, or a sheet metal shroud, and add some vent holes as needed. I'll most likely use a 2 or 3kw inverter. I could even get fancy and put a digital ac/dv volt meter in the outlet box.
I don't think that's going to work out very well. You can't mount the inverter in a sealed enclosure since it needs air flow for cooling. I've never seen a weatherproof inverter (although I'm sure they exist - probably for the military) so if you mount it under the truck with vent holes for cooling the first time you go thru deep water, or mud, or snow the inverter will be toast. A better place would be under one of the seats or behind the rear seat in a crew cab.
 
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