Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-09-2019, 02:53 PM   #1
4 Rivet Member
 
2015 Interstate Grand Tour
Lake Oswego , Oregon
Join Date: Jun 2017
Posts: 410
Extending battery life by connecting to chassis battery

Here's another thing I just discovered last week while dry camping in the Interstate. My Goal Zero 3000 had already provided me with three nights of running fridge and freezer only by turning off the 12v switch at the sliding door so that the GZ would not attempt to charge the house batteries. The GZ reserves go down 30% with each 10 hour evening. I still had 76% house battery life which is not enough to last all night (220Ah, and I don't go below 50%).

Since I have the Blue Sea ML-ACR 9622, I can use its switch to override and manually connect or disconnect the house batteries from the chassis battery. If I manually connect them with that switch, I've increased the total Ah available. Has anybody else done this?

When running this way, my Victron BMV-712 battery monitor reveals that I'm drawing only about 5.5A, not 8A, when both fridge and freezer are running. So my house batteries are contributing 2/3 of what the fridge and freezer needs and the chassis battery must be providing the rest.

Result: I can extend the usable Ah range of the house batteries to cover 50% longer time periods.

Of course, one must be careful not to let the total voltage get below 12v (like you normally do already) because now you are lowering your engine battery's reserves too.
Tronadora is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Extending Frame Depth Eartheart Repairing/Replacing Floor &/or Frame 2 08-24-2013 06:03 PM
Extending Generator Run Time on Gas RichHog Generators & Solar Power 9 09-19-2010 06:26 AM
Extending the sofa on a 2005 Safari 25' FB mshamilton Upholstery, Blinds, Walls & Interior Finishes 3 09-09-2009 09:04 AM
Extending wet camping season JimC Winter Living 3 09-28-2003 03:54 PM
Electric tongue jack not extending ipso_facto Jacks, Stabilizers, Lifting and Leveling 5 03-25-2003 11:58 AM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 04:50 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.