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Old 10-26-2006, 11:46 PM   #15
just jd.
 
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JDL (gotta love those initials) -- I measured the battery box opening on my 2007 20' to be 14 3/4 x 13 inches. There's actually a bit more room inside, as the hinged lid encroaches on the 13 inch dimension, so it might be possible to install batteries slightly longer that 13 inches.

At any rate, a pair of Interstate SRM-24s could be replaced with SRM-27Bs at 12-3/4 x 6-3/4 x 9-1/2 each. I don't know if the SRM-29 would fit at 13 x 6-3/4 x 10 because they might prove to be too tall (I neglected to measure the available height). It'd might be pretty cool to have the 29s, just looking at their 210 RC rating, compared to 140 for the SRM-24

For sure a pair of interstate SC31DM (or DA) AGMs would fit at 12-13/16 x 6-1/2 x 9-3/8 each, but I'm not prepared to give an opinion on AGM v traditional deep cycle batteries...

Of course, all this ignores the post positions, as noted by others. Have you made your choice by now, and what did you end up with?

Cheers,
-jd (l...)
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Old 10-27-2006, 09:00 AM   #16
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battery box details

Should have put up a picture of the battery box!
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Stock Interstate SRM-24 Deep Cycle Marines. Opening is 14.75 x 13: more than enough for 27s. (larger pic on flickr.com)

I did notice the connectors are somewhat recessed from the lid top, but I didn't get the actual measurement of how tall a battery would fit.

Cheers,
-jd.
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Old 10-27-2006, 09:44 AM   #17
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it's pretty easy to make the factory 2-battery box taller to accomodate taller batteries. I have a photo showing this in members photos. I replaced the group 24 12v's with 2 6 volt agms.
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Old 11-02-2006, 12:50 AM   #18
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5cats,

Thanks. I ended up using 2 Costco group 24 batteries. I tried and tried to get the 27's in the box and they would NOT fit!

However, I saw some group 27's at batteries plus that may.. They do not have the carry strap. Just a plastic handle in the middle of the battery.

(The tabs that hold the carry strap on the interstate / Costco batteries stick out just far enough so that you cannot cram them in the box..)

--Airstream--- (I know you read these posts...) could we make the battery box 1 inch wider so we could get a pair of group 27's in? It sure would make boondocking a whole lot easier...
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Old 11-02-2006, 09:41 AM   #19
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Quote:
Originally Posted by JDL
5cats,

Thanks. I ended up using 2 Costco group 24 batteries. I tried and tried to get the 27's in the box and they would NOT fit!

However, I saw some group 27's at batteries plus that may.. They do not have the carry strap. Just a plastic handle in the middle of the battery.
Sorry I should have been clearer that the measurements were all for Interstate battery specifications. I've never measured the Kirklands... Did you have any issue with the cabling positioned inside the battery box, or was it purely the handle tabs in the way? I might seriously have considered cutting off the handle tabs in the latter case, but haven't tried the fitment myself.

When I trash my own 24s, my evil plan is to look very closely at Interstate's SRM-27B or even SRM-29 -- still flooded cells, but having 180 and 210 RC respectively, versus 140 of the SRM-24s that come with my Safari.

Still, hard to beat Costco's prices, convenience, and return policy -- glad you got power.

Cheers,
-jd.
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Old 11-03-2006, 01:55 AM   #20
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Quote:
Originally Posted by 5cats
Sorry I should have been clearer that the measurements were all for Interstate battery specifications. I've never measured the Kirklands... Did you have any issue with the cabling positioned inside the battery box, or was it purely the handle tabs in the way?
-jd.
As far as I can tell it was just the handle tabs. If you cut them how are you going to get the battery out?

Also the plastic tray at the bottom is sized for group 24's.

Let me know what you do!

JDL
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