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Old 08-23-2018, 11:31 AM   #1
2016 Forester 2501TS
 
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Battery compartment enlargement

Got a 2016 Forester class C 2501-TS with battery compartment/tray under one of the coach entry steps. I want to swap out our Group 27 deep cycle 12v batteries for some Trojan 6v batteries, but found out the Trojans (and most/all 6v deep cycle batteries) are too tall to fit into the compartment under the entry step. The batteries are about 1.5" too tall for the current compartment as is. Has anyone looked into or actually modified the compartment to make it 2" deeper? I'm seriously considering cutting out the bottom of the compartment and welding on a 2" tray/extension to allow for taller batteries.

Thoughts/comments?
Thanks, Guys.
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Old 08-24-2018, 08:07 AM   #2
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We just raised the step 1.5". We don't notice the difference and the two 6v fit just fine.
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Old 08-24-2018, 09:21 AM   #3
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Originally Posted by CharSolera View Post
We just raised the step 1.5". We don't notice the difference and the two 6v fit just fine.
Happen to have any pictures? Curious what the final product looks like.
Did you add 1.5" mat'l/trim to step or to step lid?
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Old 08-25-2018, 01:23 PM   #4
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Sorry for the delay -- had to clean the area before photographing! Batteries are below the second step. Rubber stair cover on top (that's a motion activated battery operated light on the riser).Click image for larger version

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Old 08-25-2018, 01:33 PM   #5
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If it doesn't prove feasible to enlarge, you do have the option of group 29 and group 31 batteries. Both are about the same size as the group 27, even fitting in the same plastic boxes used for tongue mounts on trailers.

A group 29 (Interstate SRM-29) is 120 ah, Two of them will give the same capacity as an average pair of GC-2's.

The group 31 Deep Cycle batteries yield another 5 amp hours and usually run close to the same price as the group 29.
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Old 08-25-2018, 04:17 PM   #6
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I choose to replace 2 group 27 with 3 group 24 from Costco.

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Old 08-28-2018, 03:39 PM   #7
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Originally Posted by CharSolera View Post
Sorry for the delay -- had to clean the area before photographing! Batteries are below the second step. Rubber stair cover on top (that's a motion activated battery operated light on the riser).Attachment 184350
Wow. You’re right, you can barely tell. We recently added solar and I really wanted to add some T105 6v’s as well, but figured it would be too big of a deal. I thought about raising the step but wasn’t sure how it would turn out. Thanks for sharing!

So if you just raised the step, does it still seal properly? Did you just buy thicker rubber weather seal and the step lays on top or did you actually relocate the step hinge?
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Old 08-30-2018, 06:10 PM   #8
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I went through the same thought process as you but in the end decided to go with a couple of 200Ah 6V AGM batteries. We don't do a lot of boon docking so increasing capacity was not a objective. However, I did want to go maintenance free, keep at least the capacity that I had, and do so without adding a lot more weight. I finally settled on on some 6V AGM batteries which so far have been doing the job nicely. I did not have to increase the battery compartment size and was able to mount the solar controller and battery monitoring shunt in there as well. The details are in this post with pics at the end.

What battery type to purchase
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Old 08-31-2018, 11:28 PM   #9
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We just raised the step 1.5". We don't notice the difference and the two 6v fit just fine.


How did you raise the step?
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Old 09-03-2018, 04:04 PM   #10
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How did you raise the step?
We added a 1.5" frame to the top of the step, then attached the new step top.
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Old 09-04-2018, 09:34 PM   #11
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We added a 1.5" frame to the top of the step, then attached the new step top.
Any chance you can snap a photo with the step lid open? Kinda tough to tell what you did with the lid down. Thanks so much as Iíve been questioning what I was gonna do for a bit now!
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Old 09-05-2018, 03:52 PM   #12
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Any chance you can snap a photo with the step lid open? Kinda tough to tell what you did with the lid down. Thanks so much as Iíve been questioning what I was gonna do for a bit now!
Here is how I did mine.

Battery Upgrade Forester 2401R
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Old 09-05-2018, 04:07 PM   #13
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Here's directly under the step.Click image for larger version

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Old 09-05-2018, 04:08 PM   #14
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And here is under the plywood frame. Hope this helps!Click image for larger version

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Old 09-05-2018, 06:05 PM   #15
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And here is under the plywood frame. Hope this helps!Attachment 185567
Definitely helps, thanks so much!
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Old 09-05-2018, 06:07 PM   #16
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Awesome, that definitely helps as well! Looks great!
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