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Old 01-17-2018, 05:49 PM   #1
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6 Volt House Batteries

I have a 2014 FR Solera 24R. The house batteries are under the top entry step and are two Type 27 Flooded "deep cycle" marine batteries from Costco. I am considering doing some off the grid camping this year and need more amp hours than is currently supplies by my batteries (about 160 amp hours because they are connected parallel) and have been considering changing to two 6 volt true deep cycle golf cart batteries such as the Interstate GC2 with reserve capacity of 107 amp hours or Trojan T125 with 240 amp hours. The problem is the GC batteries are too tall to fit under the step. Has anyone found another location or used a different battery type under the step that will give significantly more capacity than what I now have? Other ideas welcome. Thanks.
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Old 01-17-2018, 06:12 PM   #2
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IF you have deep pockets, lithium batteries will offer you a tremendous amount of increased amp hours for less weight and the same group 27 size.

http://battlebornbatteries.com/shop/...cycle-battery/

A single 12v lithium drop-in by Battle Born is 29 lbs. and has close to the equivalent of 200ah of lead batteries (which shouldn't be drawn down past 50% state of charge). BB says you can use all 100AH of their batteries.

A pair of 2 will give you 200 usable amp hours (equivalent to 400ah in lead batteries).

You MIGHT need to upgrade your converter/charger to be lithium-aware.
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Old 01-17-2018, 07:03 PM   #3
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Has anyone found another location or used a different battery type under the step that will give significantly more capacity than what I now have? Other ideas welcome.
I saw a posting about this sometime in the past few months. One of our fellow MBS drivers had removed the top of the step, added a bit of spacing on top of the walls of the battery compartment, and then reinstalled the top of the step.

As reported, the amount of additional height required wasn't huge and the difference in step height wasn't thought to be a problem.

Dave
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Old 01-17-2018, 08:36 PM   #4
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Thanks ependydad. I see what you mean IF I have deep pockets. Wow! Those batteries are $949 EASCH!!! Even if I had the pockets, I think my wife would have my head examined if I told her what I wanted to do. And DaveJordan thanks. I'd might do a mock up to see how my wife's bad knees would take the extra step rise. Certainly worth thinking about. Do you remember who posted on the MBS forum or when?
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Old 01-17-2018, 11:32 PM   #5
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Thanks ependydad. I see what you mean IF I have deep pockets. Wow! Those batteries are $949 EASCH!!! Even if I had the pockets, I think my wife would have my head examined if I told her what I wanted to do.

I explained to my wife about all of the awesome boondocking it opens!

Maybe promise to take her to Albuquerque to the International Balloon Fiesta!

https://flickr.com/photos/7200488@N0...57687401476784
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Old 01-18-2018, 08:40 AM   #6
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David, I have four AGM batteries. They are a tiny bit taller than the originals. The step was modified to accommodate two of them (no noticeable height difference when you use the steps). The other two are in the exterior storage compartment next to the entry (mine is a 24S Solera).
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Old 01-18-2018, 02:08 PM   #7
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Sorry I can't go to the camper and look at the brand, but I was able to find some good 6v batteries shorter than the Trojans. I'm glad I changed from the size 27 12v.
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Old 01-18-2018, 02:46 PM   #8
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David, I have four AGM batteries. They are a tiny bit taller than the originals. The step was modified to accommodate two of them (no noticeable height difference when you use the steps). The other two are in the exterior storage compartment next to the entry (mine is a 24S Solera).
Thanks. Did you have someone do the install? Seems like a lot to rewiring if two of the batteries are in a storage compartment.
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Old 01-18-2018, 02:52 PM   #9
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Sorry I can't go to the camper and look at the brand, but I was able to find some good 6v batteries shorter than the Trojans. I'm glad I changed from the size 27 12v.
Thanks. I disconnected my batteries and have them in my garage right now because I was seeing a .2 amp load on the batteries with the disconnect switch in the off position. Glad I did because we have been having an extended stretch of extremely cold temperature--at least for the Memphis, TN area. If you would, and when you can, let me know the brand of batteries you installed. I am not in a rush to make a changeover. Still gathering knowledge. Also, did you go with two or four 6 volt batteries?
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Old 01-18-2018, 03:15 PM   #10
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David the basic interstate GC2's have 210 amp hours at the 20 hours rate not 107 as you stated. They also have an Extreme Cycle line which provides 225A/H.
If you plan to do a lot of boondocking...you might consider the Signature or RVline from Trojan and both have 3 GC2 models ...T105/T125/T605.. in flooded batteries...the T125 offers 240ah.
Note that TESTING is not the same between the two manufacturers AND cycle life expectations are not stated...amp hours ain't the whole story!
Personally I'd get the Trojans of your choice if within your budget for long life & cycles.
If you don't boondock a lot...you might consider the Costco or Sams' golf cart batts since cycle life is not an issue so much when you are mostly plugged in.
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