RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×

Thread Tools Display Modes
Old 01-03-2020, 10:41 AM   #11
Senior Member
Join Date: Aug 2019
Location: Elk Grove, CA
Posts: 205
This has been a very helpful thread. Based on the info here, I'm putting my AGM inside.


2005 E350 Super Duty Ext Wheelchair Van
2002 Itasca 35U Motorhome
BCam is offline   Reply With Quote
Old 01-24-2020, 01:44 AM   #12
Join Date: Sep 2019
Posts: 75
Originally Posted by jjbusch View Post
Hi all. I have two of these mounted similarly under the barn doors holding AGM batteries, and am planning on moving the batteries indoors for two reasons.

First, and last significant issue is that they are a pain to drop and work on in an urgent situation. I learned this lesson the hard way in a campground in the Atacama desert where I didn't have access to a floor jack.

Second, and more importantly is the poor positioning of the boxes on the rail opposite the exhaust. If you are in cold climates or are always traveling 50mph+, the location and heat generated by the exhaust is not an issue... However, if your are ever planning on idling, traveling up long and steep mountain passes at expectedly low speeds, spend time in the southern part of the US (or anywhere in the tropics), or encounter stop and go traffic - you might want to reconsider positioning your batteries in this location. During our 8+ month trip through South America we toasted our batteries, I believe due to excessive heat production in this mounting position. Sometimes the battery monitor read over 140°. In veracruz state México, the batteries never dropped below 120°, even as I was traveling 50 mph. In fact, driving around Seattle in stop and go traffic causes my battery monitor's high temp alarm to trigger (alarm is set at 117°).

Considering that actively charging an AGM battery under high temperatures (120°+) can destroy the battery (and appears to have ruined $500 worth of batteries in my case), in retrospect I have realized that this is probably the worst place that I could have mounted my batteries.

As always YMMV.

Wow -- great point. Maybe a heat shield would help? You could certainly add one without having to drop the batteries.

I was going to place my house batteries in that location -- might do something different now. Perhaps driver side will be fine -- but I'll have to remove the rear AC/heat plumbing first I reckon.

winnievan is offline   Reply With Quote
Old 01-24-2020, 04:00 PM   #13
Senior Member
Join Date: Nov 2019
Location: Denver Colorado
Posts: 290
We are going with 2 lithium batteries inside. Swapped out the lead acid batteries for the lithium's in our 5th wheel and can't say enough about them. Only downside is they don't like bitter cold (thats why inside) and they are expensive but otherwise they top AGM's or lead acid in every way

Lilnuts2 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 07:12 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.