Reply
 
Thread Tools Search this Thread Display Modes
 
Old 01-31-2019, 11:01 AM   #1
2 Rivet Member
 
2017 27' International
Currently Looking...
Box Elder , South Dakota
Join Date: Jul 2016
Posts: 78
Batteries vs Inverter

How to distinguish between bad batteries and a bad inverter or something else: I seldom use the inverter outlets. I am usually plugged into 30 amp shore power. And usually the battery indicator will read 13.something, like 13.5 or whatever. Yesterday the indicator started reading 12.7 or thereabouts. With the help of a more knowledgeable friend, we disconnected the battery and charged it overnight. Not all the way but it tested above 13 before I became impatient. It is now back down to 12.7. Of course I had no lights, radio, TV antennae overnight. And incidentally I could not get the refrigerator to switch over to propane, it stayed off as well as the refrigerator lights. I am guessing it is the inverter that is bad as that would cost the most money to fix. (snark, snark) I have a supplemental 7 year warranty with the dealer which involves driving 1000 miles to the dealer to have them look at it. The batteries are two years old, the 1000 watt pure sine wave inverter came with my brand new 2017 International Serenity. Is there further testing I can do or should I just buy two new batteries and see if that solves the issue? Thanks.
__________________

alphamale49 is offline   Reply With Quote
Old 01-31-2019, 11:08 AM   #2
.-. -...
 
Adventure.AS's Avatar

 
2017 25' International
Port Dover , ON Canada
Join Date: May 2016
Posts: 1,452
12.7 volts is 100% SOC for rested batteries. Is your “Use” switch on?
__________________

__________________
Ray B.

“One test is worth a thousand 'expert' opinions”
Sign at Boeing headquarters, posted by test pilot Alvin “Tex” Johnston, c1948
Adventure.AS is online now   Reply With Quote
Old 01-31-2019, 11:54 AM   #3
Rivet Master
 
TouringDan's Avatar

 
1966 24' Tradewind
1995 34' Excella
Lynchburg , Virginia
Join Date: Sep 2009
Posts: 3,063
Batteries vs Inverter

If you were plugged in and had no 12v power, the problem would be your converter (battery charger), not your inverter. The inverter converts 12v dc to 120v ac.

Dan
TouringDan is offline   Reply With Quote
Old 01-31-2019, 11:56 AM   #4
2 Rivet Member
 
2017 27' International
Currently Looking...
Box Elder , South Dakota
Join Date: Jul 2016
Posts: 78
First of all let me apologize. My friend now says he misspoke and the problem may be with the converted, not the inverter. And I am really confused if you are not. The switch is set to 'use' and the little light is on. I always have it set that way.
alphamale49 is offline   Reply With Quote
Old 01-31-2019, 12:01 PM   #5
Rivet Master
 
TouringDan's Avatar

 
1966 24' Tradewind
1995 34' Excella
Lynchburg , Virginia
Join Date: Sep 2009
Posts: 3,063
I don’t see a problem. Does everything work? Here is a voltage table. You want to keep your batteries above 50% SOC (state of charge). I would get a volt meter and mount it permanently.

DanClick image for larger version

Name:	IMG_3223.jpg
Views:	43
Size:	314.2 KB
ID:	332701Click image for larger version

Name:	IMG_0324.jpg
Views:	45
Size:	159.4 KB
ID:	332702
TouringDan is offline   Reply With Quote
Old 01-31-2019, 12:08 PM   #6
2 Rivet Member
 
2017 27' International
Currently Looking...
Box Elder , South Dakota
Join Date: Jul 2016
Posts: 78
I am plugged into 30 amp shore power, the battery is reconnected and the switch set to 'use' Everything works, the indicator now says 12.9. So maybe there never was a problem? But why did the indicator always say 13.5 before I manufactured this crisis?
alphamale49 is offline   Reply With Quote
Old 01-31-2019, 12:20 PM   #7
LDM
2 Rivet Member
 
2018 25' Flying Cloud
Jonesville , Louisiana
Join Date: May 2018
Posts: 30
Sound like your converter slow it charging rate back as the batteries are getting close to full charge. That is what it should do. When plug in to shore power you are getting the charging rate on your battery. If you want to get Just battery rate un plug from shore power.
LDM is offline   Reply With Quote
Old 01-31-2019, 12:22 PM   #8
Rivet Master
 
TouringDan's Avatar

 
1966 24' Tradewind
1995 34' Excella
Lynchburg , Virginia
Join Date: Sep 2009
Posts: 3,063
Quote:
Originally Posted by alphamale49 View Post
I am plugged into 30 amp shore power, the battery is reconnected and the switch set to 'use' Everything works, the indicator now says 12.9. So maybe there never was a problem? But why did the indicator always say 13.5 before I manufactured this crisis?


Because the converter was charging the battery and the charging voltage at the converter was 13.5 volts. The charging voltage needs to be higher than the battery voltage for the batteries to take a charge. If you want to know the battery voltage when you are plugged in you need to unplug your Airstream or unplug your converter.

Dan
__________________

TouringDan 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
prep for my solar future: Inverter charger/inverter-converter combo wonderlust87 Electrical - Systems, Generators, Batteries & Solar 1 09-13-2017 10:50 AM
Lifeline Batteries and Magnum Inverter Beach Bum Airstream Classifieds 7 12-14-2015 09:37 AM
Parallel non inverter generator with inverter generator? mtbguy Generators & Solar Power 3 07-15-2015 01:48 PM
Replace House Batteries (Magnum Inverter) MILATV Sprinter and B-van Forum 24 11-04-2014 06:11 PM
Mixed batteries and surprised with converter/inverter outofcontrol Batteries, Univolts, Converters & Inverters 14 05-08-2014 09:04 PM


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.




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:30 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.