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Old 05-18-2016, 02:38 PM   #1
mdf
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Battery Upgrade

Hi All,

Wanted to share a recent battery upgrade I was able to complete (with professional help) based on great advice from the forum. I have a 2016 Interstate Lounge 4x4, with the stock batteries under the coach on the drivers side. My goal was to simply add battery and solar capacity to expand dry camping flexibility. Eventually, I would like to add a more robust solar system (read: Lewster, when he has time!), but we didn't have time to take that on before a 5000 mile summer trip starting next month. So to get me through the trip I :

1) added a second 100W go-power flex panel on the roof, utilizing the existing wiring, controller, etc. I realize this system isn't ideal, but it will have to do for now, and was relatively simple as they make an add on kit which greatly simplified wiring and installation.

2) Converted the (2) stock 12v batteries to (4) Lifeline 6v 4CT AGM batteries.

I looked into trying to modify the under coach battery boxes, but that didn't work so well. So instead, we found that the Lifeline 4CT's fit perfectly in the metal under floor storage box under the floor of the storage area. See the attached pic.

Shout out to Vinnies Airstream repair in Santa Rosa, CA. Vinnie installed these batteries for me. Highly recommended for any of your service needs while in the NorCal area! Second shout out to Lewster for all the great advice -- can't wait to do the rest of the project when schedules permit.
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Old 05-18-2016, 04:01 PM   #2
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No picture attached to your post. Id like to see how your squeezed four batteries into that storage box.
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Old 05-18-2016, 04:41 PM   #3
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Sorry, my internet must be too slow to upload the hi res pic. Will post when I can save in a smaller footprint. We had to take the plastic hatch off to get them in, then reinstall once they were seated.
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Old 05-18-2016, 05:06 PM   #4
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No picture attached to your post. Id like to see how your squeezed four batteries into that storage box.
Yes - I was wondering about that too! 4 batteries?
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Old 05-18-2016, 05:35 PM   #5
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MDF,

I saw your Interstate at Vinnie's. I had my trailer in for some service work. The batteries looked great and are a perfect fit. I want to second your opinion of Vinnie's work! He did a great job for me.
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Old 05-18-2016, 06:33 PM   #6
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Here is the photo

(4) Lifeline 4CT 6 volts
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Old 05-18-2016, 06:37 PM   #7
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One more thing about Vinny. He was previously the service manager at Mercedes Benz of Santa Rosa, so he is more than familiar with the Sprinter. Conveniently, his shop is literally across the street from MB Santa Rosa. Easy to get anything fixed or serviced!
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Old 05-18-2016, 09:35 PM   #8
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Very nice picture......hmmmmmm.....
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Old 05-18-2016, 10:31 PM   #9
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Looks like a great idea. My only concern comes from memories of my Ford Pinto....granted these are not gas tanks....but....
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Old 05-18-2016, 11:06 PM   #10
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Interesting placement and nice work but remember that 4 Lifeline 4CT golf cart batteries weigh in at about 270 lbs. Thats a bit of weight to place that far to the rear of the long wheel base Sprinter.
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Old 05-18-2016, 11:36 PM   #11
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Thanks everyone - to be clear - this was a stop gap solution to get me through this summer. The 4cts are heavy, although I think not an issue. I did remove the stock 24s, which were also pretty far back (and off center) and almost equal in weight to two of the 4cts. Lewster, we will go lithium when the big project gets done!
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Old 05-19-2016, 12:27 AM   #12
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Might make the rear ride less bouncy.
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Old 05-19-2016, 05:05 AM   #13
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Might make the rear ride less bouncy.

+1 on this

If not batteries maybe put some cinder/concrete blocks in temporarily


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Old 05-19-2016, 06:40 AM   #14
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Interesting placement and nice work but remember that 4 Lifeline 4CT golf cart batteries weigh in at about 270 lbs. Thats a bit of weight to place that far to the rear of the long wheel base Sprinter.
Well within the Sprinter's/Interstate's load-bearing capacity.

It would be a good idea to weigh the loaded van (including rear-seat passengers) by axle to see how close it is to the Gross Rear Axle Weight rating— which can determine if the added weight of the batteries takes away any tongue weight capacity for trailer towing or use of a hitch-mounted cargo carrier. As long as GRAW is still at least 500 pounds more than the actual rear axle weight, there should be no reduction in towing capacity with regard to tongue weight.
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