Thread Tools Display Modes
Old 03-16-2016, 09:00 PM   #1
Senior Member
Join Date: Jun 2015
Posts: 349
AGM Battery and Victron Battery Monitor Install

Due to recurring problems with off-gassing and the CO/LP detector going into alarm, I decided to replace the OEM Group 27 flooded batteries with Group 31 AGM's. I also installed a Victron Energy BMV-702 monitor which provides detailed monitoring of the coach batteries and auxiliary voltage monitoring of the chassis battery.

Once I removed the original batteries, it became obvious to me why there was so much off-gassing. The battery cable terminal connected to one of the high amperage fuses was improperly swaged - which likely led to high current draw and ultimately killed one of the two batteries (picture attached). I would have thought that hydraulic swage tools with the proper dies would be used in a factory - as opposed to $20 hammer type crimpers that DIY'ers buy at Harbor Freight. Oh well, it's fixed now.

Also figured out why the rubber covering the step wasn't staying attached - too much sawdust and shavings stuck to the contact cement. That's fixed now, too.

The Crown AGM batteries are a bit taller and a bit heavier than the OEM batteries, which made for a tight fit in the battery compartment. The shunt for the Victron monitor fit nicely on the back wall of the battery box and may be visible in one of the pictures.

Hopefully, this will be a good mod to our MH. One thing the Victron did was to verify that the converter/charger will charge both the coach and chassis batteries under certain conditions when on shore or generator power.
Attached Thumbnails
Click image for larger version

Name:	IMG_2042.jpg
Views:	129
Size:	287.5 KB
ID:	102110   Click image for larger version

Name:	IMG_2043.jpg
Views:	130
Size:	385.4 KB
ID:	102111   Click image for larger version

Name:	IMG_2046.jpg
Views:	119
Size:	382.3 KB
ID:	102112   Click image for larger version

Name:	IMG_2050.jpg
Views:	115
Size:	294.9 KB
ID:	102113   Click image for larger version

Name:	IMG_2066.jpg
Views:	121
Size:	255.3 KB
ID:	102114  


KatanaPilot is online now   Reply With Quote
Old 03-16-2016, 09:11 PM   #2
Senior Member
Rkloud9's Avatar
Join Date: Jan 2016
Location: Chicago
Posts: 133
Nice job! Please keep us posted on the performance of the new set up.

Bob & Cynthia
SunSeeker MBS 2400W Under Construction, to arrive April 1st
Sent from my iPad using Forest River Forums

Rkloud9 is offline   Reply With Quote
Old 10-02-2016, 10:49 PM   #3
Join Date: Sep 2016
Location: Canyon Hills CA
Posts: 38
What type of cost on all that, curious if while my batteries are still good I would want to replace.
BALLZITCH 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

» Virginia Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 08:52 PM.