Reply
 
Thread Tools Search this Thread Display Modes
 
Old 01-13-2017, 02:05 PM   #1
New Member
 
Join Date: Oct 2014
Posts: 2
Totally bumed out

I have spent many hours trying to figure out why my batteries go flat (10 volts) in less than one day. I've taken them to a battery dealer and they are ok. My only solution so far has been total disconnect, but that is a pain. On the road they last less than one hour if I run the heater, etc., less, if I run the inverter. I always use the on board battery disconnect when storing for more than a few hours, but something is stealing my juice anyway
__________________

__________________
davef is offline   Reply With Quote
Old 01-13-2017, 02:39 PM   #2
Rivet Master
 
mimiandrews's Avatar
 
1966 22' Safari
Weatherford , Texas
Join Date: Jun 2008
Posts: 1,341
First, charge the batteries and leave them disconnected for a few days. If they don't hold a charge when disconnected, something is wrong with the batteries. How old are they? Have they been allowed to sit in a discharged state?

With the batteries removed and everything off, connect an ohm meter between the wires for the positive and negative battery terminals. If the meter doesn't read infinity--completely open circuit, something is either always on or shorted. If the meter does read infinity, go back to the batteries.

If you do find that there is a current path between the positive and negative wires, then the laborious process of isolating the bad circuit starts. Pull fuses or open circuit breakers and test each circuit individually until you find the culprit.
__________________

__________________
mimiandrews is offline   Reply With Quote
Old 01-13-2017, 03:08 PM   #3
4 Rivet Member
 
SSquared's Avatar
 
2013 25' FB Flying Cloud
Longmont , Colorado
Join Date: Jan 2012
Posts: 431
Your batteries may actually be bad. Some battery dealers test batteries by simulating a vehicle starting load--high current (over 100 amps) for just a few seconds. That's a good test for a car battery, whose hardest job is to start the car. In our trailers, we never put such a high current load on the battery, but we run in for hours (or a few days) at low current. A battery can be good for a few seconds but not for a few hours.

There are ways to figure out for sure what is wrong, but that takes more explaining than I can do here.
__________________
SSquared is online now   Reply With Quote
Old 01-13-2017, 05:45 PM   #4
Rivet Master
 
Caffeinated's Avatar
 
2015 27' Flying Cloud
Portland , Oregon
Join Date: May 2015
Posts: 661
What year and model is your trailer? If your batteries have gone under 11.5V you risk damaging them.

Mike
__________________
Caffeinated is offline   Reply With Quote
Old 01-13-2017, 05:58 PM   #5
4 Rivet Member
 
sgschwend's Avatar
 
1986 25' Sovereign
2008 F350, 6.4L diesel , Oak Harbor, WA
Join Date: Sep 2015
Posts: 404
Images: 11
You could measure the Energy yourself too. Your batteries are rated for so many AH (amp hour). Purchase a $20 volt meter that can measure up to 10Amps of current too.

Using the user manual setup for amps and turn on the trailer lights to obtain a amperage just below 10 amps. Remove the amp meter setup and setup for voltage measurement.

Monitor the voltage of the battery over several hours of run time. A good 100 Ah battery would deliver 50 Ah safely, which would be around 5 hours of testing. You can see the state of charge by the battery voltage reading (this value is temperature dependent, so I won't pass on the value you are looking for, something around 12.5VDC).

Lead acid batteries are strange animals. The performance of the battery is related to the surface area of the lead plates. As a battery ages that surface area continues to become less; while it will still pump out a lot of amps but still not have the storage as specified for that battery.
__________________
sgschwend is offline   Reply With Quote
Old 01-13-2017, 06:14 PM   #6
3 Rivet Member
 
brokeboater's Avatar
 
Currently Looking...
High Springs , Florida
Join Date: Jul 2006
Posts: 148
You don't give any specifics on your rig so it's a bit hard to give an opinion but I won't let that keep me. It is quite possible your batteries aren't being charged adequately for a number of reasons. A substandard converter and an overly long run of undersized wire to the batteries from said converter comes to mind. What year and model is your rig? What converter is currently in it? What does a volt meter show at the batteries with the converter on and off?
__________________
brokeboater is offline   Reply With Quote
Old 01-13-2017, 06:27 PM   #7
4 Rivet Member
 
2017 26' Flying Cloud
Granbury , Texas
Join Date: Aug 2014
Posts: 408
Quote:
Originally Posted by davef View Post
I always use the on board battery disconnect when storing for more than a few hours, but something is stealing my juice anyway
This could be your problem. You must leave the the battery disconnect "on" when you want to charge the batteries from your onboard converter not in "store".

Also, your onboard converter might not be working. Try using a external regular auto 12volt battery charger and see if the batteries come up.
__________________

__________________
cabinetmaker 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
Is This Plan Totally Crazy? HamiBambi Repairing/Replacing Floor &/or Frame 58 05-21-2012 03:48 PM
Totally Cool Clocks Jimandrod Our Community 0 03-12-2008 03:23 PM
Totally new and dreaming.... earnedmyears Member Introductions 1 06-06-2007 03:09 PM
Potty Mouth, Potty Mind, Totally Confused henrydahm Waste Systems, Tanks & Totes 7 07-27-2006 09:37 PM
Totally Original! RichardT Our Community 3 03-10-2004 12:15 PM


Virginia Campgrounds

Reviews provided by



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 -6. The time now is 04:42 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.