Sprinter-Forum    
 

Go Back   Sprinter-Forum > Sprinter-Based RV's & Conversions > Sprinter-Based RV Brands > Winnebago / Itasca

Winnebago / Itasca Itasca Navion, Winnebago View.


 
Thread Tools Display Modes
Old 10-25-2013, 01:54 AM   #1
TJLee089
2013 Itasca Reyo 25R
 
Join Date: May 2012
Location: Lehigh Valley, PA
Posts: 1,257
Thanks: 273
Thanked 648 Times in 442 Posts
Lightbulb Practical Use of a Battery Monitor

I recently installed a Victron BMV 600S Battery Monitor and in the process learned a lot about shunt-based battery monitors. I hope the attached paper will be of some value. Any comments are welcome.
Attached Files
File Type: pdf Victron BMV 600S Battery Monitor.pdf (337.1 KB, 295 views)
TJLee089 is offline   Reply With Quote
The Following 7 Users Say Thank You to TJLee089 For This Useful Post:
aljimenez (10-25-2013), Aqua Puttana (10-25-2013), autostaretx (10-25-2013), daveflack (10-26-2013), JohnY (10-29-2013), Peter Tourin (09-13-2014), RoadHobo (10-29-2013)
Old 10-25-2013, 03:00 AM   #2
autostaretx
Erratic Member
 
autostaretx's Avatar
 
Join Date: Sep 2006
Location: Seattle
Posts: 16,213
Thanks: 2,841
Thanked 7,159 Times in 5,250 Posts
Default Re: Practical Use of a Battery Monitor

Wonderful... the empirical determination of battery capacity alone was worth the price of admission...

How quaint that NAPA doesn't provide the fundamental parameter of capacity (ampere hours).

thanks
--dick
__________________
2005 T1N 118" Freightliner 2500 Passenger Wagon (2.7L, 15" tires, standard (short) roof)
Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))
autostaretx is offline   Reply With Quote
Old 10-26-2013, 01:02 PM   #3
daveflack
 
Join Date: Oct 2010
Location: Sunnyvale, CA
Posts: 4
Thanks: 1
Thanked 0 Times in 0 Posts
Default Re: Practical Use of a Battery Monitor

I have used the Victron in another RV for 4 years and couldn't live without it. Just bought a Navion 08J and will install. Where did you place the monitor and how did you route the wiring?
daveflack is offline   Reply With Quote
Old 10-26-2013, 02:40 PM   #4
TJLee089
2013 Itasca Reyo 25R
 
Join Date: May 2012
Location: Lehigh Valley, PA
Posts: 1,257
Thanks: 273
Thanked 648 Times in 442 Posts
Default Re: Practical Use of a Battery Monitor

Routing the signal cable between the shunt and the monitor is the only difficult and challenging part of the installation. I mounted the monitor with my other gauges. I drilled a 2 inch hole and had to enlarge it slightly. I didn't use the included bezel. See attached photos.

To run the signal cable, I removed as many of the panels and drawers as possible along the cable path. I dropped a string with a weight from near the monitor location and used it as a cable puller. I drilled one hole through the floor of the van, which was concealed by a removable cabinet floor. I used flexible plastic conduit between this hole and the battery compartment and sealed the floor hole.

Spend the time to plan your route carefully. I spent the better part of a day on this and am pleased with the result.

I still think the Victron is the best choice because the signal cable is included and is modular. The only thing you will need to provide is the short battery cable between the battery and the shunt. Be sure to use a cable size that is no smaller than your existing negative battery cable. It is unlikely you will find what you need off-the-shelf at an auto store. Have a repair shop make it for you.

Thanks for your interest and GOOD LUCK!
Attached Images
File Type: jpg 100_5866c.JPG (80.1 KB, 282 views)
File Type: jpg 100_5867c.JPG (78.6 KB, 259 views)
File Type: jpg 100_5872c.JPG (109.6 KB, 246 views)
File Type: jpg 100_5873c.JPG (100.7 KB, 238 views)
File Type: jpg 100_5875c.JPG (68.1 KB, 246 views)
TJLee089 is offline   Reply With Quote
The Following User Says Thank You to TJLee089 For This Useful Post:
RoadHobo (10-30-2013)
Old 10-26-2013, 03:08 PM   #5
NBB
 
Join Date: Sep 2009
Posts: 1,247
Thanks: 82
Thanked 414 Times in 284 Posts
Default Re: Practical Use of a Battery Monitor

The cable on the left of the shunt looks pretty small - inadequate - compared to the other cables being used around the battery. The current traveling through all of them is the same, they should all be the same gauge.
NBB is offline   Reply With Quote
Old 10-26-2013, 03:48 PM   #6
autostaretx
Erratic Member
 
autostaretx's Avatar
 
Join Date: Sep 2006
Location: Seattle
Posts: 16,213
Thanks: 2,841
Thanked 7,159 Times in 5,250 Posts
Default Re: Practical Use of a Battery Monitor

OK, i give up... What's that thing? (white arrow)
It looks like another shunt inserted in the positive cable run?
(i suppose it could be a fuse...)

WhatsThat.jpg

--dick
__________________
2005 T1N 118" Freightliner 2500 Passenger Wagon (2.7L, 15" tires, standard (short) roof)
Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))
autostaretx is offline   Reply With Quote
Old 10-26-2013, 05:59 PM   #7
icarus
 
Join Date: Jul 2010
Posts: 6,663
Thanks: 592
Thanked 2,510 Times in 1,701 Posts
Default Re: Practical Use of a Battery Monitor

Quote:
Originally Posted by NBB View Post
The cable on the left of the shunt looks pretty small - inadequate - compared to the other cables being used around the battery. The current traveling through all of them is the same, they should all be the same gauge.
Not quite.

The signal cable from the shunt will carry ~1/100 or less of the shunt current, hence the reason to use a shunt in the first place.

Dick,

I'm guessing it is a fuse.

Icarus
icarus is offline   Reply With Quote
Old 10-26-2013, 08:13 PM   #8
TJLee089
2013 Itasca Reyo 25R
 
Join Date: May 2012
Location: Lehigh Valley, PA
Posts: 1,257
Thanks: 273
Thanked 648 Times in 442 Posts
Default Re: Practical Use of a Battery Monitor

"The cable on the left of the shunt looks pretty small - inadequate - compared to the other cables being used around the battery. The current traveling through all of them is the same, they should all be the same gauge."

The cable you are referring to (left side of shunt) is the OEM 1 gauge cable, as are all other OEM cables. If it is too small, you know more than the motorhome design engineers. The cable I added (right side of shunt) is 2/0 gauge, two sizes larger. That's what my neighbor/mechanic had available.

Never judge a book by its cover.

Last edited by TJLee089; 10-26-2013 at 08:20 PM. Reason: additional info
TJLee089 is offline   Reply With Quote
Old 10-26-2013, 08:15 PM   #9
TJLee089
2013 Itasca Reyo 25R
 
Join Date: May 2012
Location: Lehigh Valley, PA
Posts: 1,257
Thanks: 273
Thanked 648 Times in 442 Posts
Default Re: Practical Use of a Battery Monitor

Quote:
Originally Posted by autostaretx View Post
OK, i give up... What's that thing? (white arrow)
It looks like another shunt inserted in the positive cable run?
(i suppose it could be a fuse...)

Attachment 55259

--dick
It's OEM. I'm not really sure what it is. A fuse to prevent the cable from overheating seems to be a good guess.
TJLee089 is offline   Reply With Quote
Old 10-27-2013, 01:28 AM   #10
Oldfartt
 
Oldfartt's Avatar
 
Join Date: Nov 2006
Location: Nelson New Zealand
Posts: 873
Thanks: 142
Thanked 426 Times in 293 Posts
Default Re: Practical Use of a Battery Monitor

To help equalize the current through the two batteries, the new negative cable should be connected to the left battery, not the right hand battery.
The device in question is undoubtedly a Fuse. It is there to protect the wiring and is in the right place, close to the battery terminals.
Cheers

Ross
__________________
2011 315 Mercedes extra long Cargo Van converted to RV
2000 313 Mercedes Sprinter Motorhome (Sold)

Last edited by Oldfartt; 10-27-2013 at 01:30 AM. Reason: addition
Oldfartt 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

Forum Jump



All times are GMT. The time now is 02:15 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.