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Old 05-14-2015, 01:11 PM   #1
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Adding second battery to a 2015 22' sport -

Looking for ideas on how to add a second battery to a 22' Sport. Existing single battery lies crosswise and not enough room to add second. Airstream dealer suggests filling bracket with plywood, then turning both batteries 90 deg and bolting/lashing it all down.

Any experience or thoughts out there?


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Old 07-15-2015, 10:30 AM   #2
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Bump.
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Old 07-15-2015, 10:47 AM   #3
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I don't own one but would there be a way to get a welder to put in a battery support on the A frame so you could have two batteries running length wise? There should be plastic battery boxes to hold two batteries.

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Old 07-16-2015, 09:51 AM   #4
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Why a second battery? I went with a GR29 which has almost the same capacity as 2 GR24's. Love it. You will need a new battery box and it is a tight fit but works.
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Old 07-16-2015, 10:51 AM   #5
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A couple of sources for battery boxes:

Battery Boxes from BD Batteries

Group Size GC2 Plastic Battery Box - Remy Battery
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Old 07-27-2015, 08:28 PM   #6
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I have a 2014 sport and also looking for a way to add a 2nd battery. I was told by a battery expert to put 2 - 6 volt batteries . It will be equal to 3- group 24 12volt batt.
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Old 07-27-2015, 08:28 PM   #7
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I am looking for a way to add a 2nd battery.
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Old 09-01-2015, 06:45 AM   #8
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I had Can Am add a second group 24 to my 2014 Sport 16 when I got it. They put the two battery boxes side by side and just had to trim the lids to fit.
Just upgraded to a 22 Sport so will look at all my options when it arrives. I am thinking about upgrading to 2 agm batteries and was thinking of putting them under the front bed then using the battery tray to mount my Honda ES 2000i.
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Old 10-16-2015, 08:34 AM   #9
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Curious how this worked out for other Sport 22 owners. Looking to upgrade from my single Interstate Group 24, and wanted to see if others had any luck getting the following to fit on the Sport 22's A-frame:

1. Two Group 24's
2. Single Group 27 or 29
3. Two 6V golf cart batteries

Sure seems like a 27/29 should fit, but wonder if any increased capacity would even be worth it. The dual 6V sounds like it offers the greatest capacity and depth of discharge, but will it fit without a major modification?
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Old 10-17-2015, 01:52 PM   #10
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The GR29 works very well for us. Can't see adding extra weight for minimal capacity increase. I've heard too many negative stories about going with two 6v like charging problems and what do you do when one of the 6V's gets a shorted cell?
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Old 10-17-2015, 03:38 PM   #11
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Quote:
Originally Posted by Ahab View Post
I've heard too many negative stories about going with two 6v like charging problems and what do you do when one of the 6V's gets a shorted cell?
Two six volt batteries in series have 6 cells, the same as one 12 volt battery has 6 cells. The cells in the 6 volt battery are far larger and heavier and better built that the small cells in a 12 volt battery. The chances of them shorting are far smaller than a similar fault in a 12 volt battery. It is simply a non issue.

I have no idea what the "charging problems" statement is based on. Two 6 volt batteries in series is 12 volts, and they charge the same as any other 12 volt battery.

A pair of 6 volt golf cart batteries in series will trump a pair of group 24 12 volt batteries or a single group 29 battery every time for capacity and life.
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Old 10-18-2015, 09:58 AM   #12
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Quote:
Originally Posted by idroba View Post
Two six volt batteries in series have 6 cells, the same as one 12 volt battery has 6 cells. The cells in the 6 volt battery are far larger and heavier and better built that the small cells in a 12 volt battery. The chances of them shorting are far smaller than a similar fault in a 12 volt battery. It is simply a non issue.

I have no idea what the "charging problems" statement is based on. Two 6 volt batteries in series is 12 volts, and they charge the same as any other 12 volt battery.

A pair of 6 volt golf cart batteries in series will trump a pair of group 24 12 volt batteries or a single group 29 battery every time for capacity and life.
Nonsense.
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Old 10-18-2015, 11:24 AM   #13
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Quote:
Originally Posted by Ahab View Post
Nonsense.

As the saying goes 'you are entitled to your opinion but not your own FACTS!'

I'm solidly behind Idroba on this topic and he has succinctly stated the 'facts'.

I also place my 15 years in the RV business and the hundred or so battery systems that I have replaced with strings of 6 VDC golf cart style batteries solidly behind his statements.

They have definitely proven themselves in the long run, especially Lifeline AGMs, as I have never seen them or any other 6VDC battery 'shorted'. The plates of AGMS are pressure packed between porous a sponge-like material that holds the electrolyte resulting in no possibility for movement or 'shorting' and liquid cell golf cart batteries have plates at least twice the thickness of a 12 VDC battery. After all, they are built to take the pounding of actual golf cart use on the course.

And your facts to back up your 'opinion' ?????????


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Old 12-20-2015, 08:14 PM   #14
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Hi i am replacing the one 12volt battery with 2 6volt batteries same place same way one on top of the other,having a stainless box to match one on my propane tanks
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