RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-23-2020, 07:04 PM   #1
New Member
 
2014 Interstate Ext. Coach
Tavernier , Florida
Join Date: Oct 2020
Posts: 2
Parasitic Current Drain?

Hi all. I have a 2014 Interstate EXT. I had it in the shop for the last 3 days. I turned the battery switch off when I dropped it off, and confirmed everything was shut down. My batteries are 6 week old 90 AH 12 V AGM. They were fully charged when I dropped off the rig. I picked it up today, turned on the batteries, and they were nearly dead, 10.8 V. I have always suspected that something was discharging the batteries faster than they should. One night of boon docking drops them from fully charged to about 12.2V. It's not just the new batteries, but my old ones as well.

Anyone have any ideas or suggestions?

edit: to be clear, it was in the shop for engine servicing, nothing to do with the RV side of the house. The mechanic never touched the battery switch.
JDKub is offline   Reply With Quote
Old 10-24-2020, 07:19 AM   #2
Rivet Master
 
2018 25' International
Slidell , Louisiana
Join Date: Sep 2017
Posts: 2,619
I would begin by directly measuring current draw when the battery switch is off. Three days down to 10.8 Volts indicates all 180 AH. Adjusting for resistive losses and whatnot, that is at least 3 amp continuous draw. Your overnight experience is similar with 4-5 amps minimum draw unless the batteries are weak.

So get digital multimeter capable of measuring DC current. the ones with inductive pickup are nicer since you don't have to disconnect wires. You don't need an expensive one. $35-50 will do it.

If you get more than 3 amps then the task is to find where it is going. If you get much less, next is to test the batteries condition.
__________________
Brian
BayouBiker is online now   Reply With Quote
Old 10-24-2020, 09:36 AM   #3
New Member
 
2014 Interstate Ext. Coach
Tavernier , Florida
Join Date: Oct 2020
Posts: 2
Where would I measure that? From the battery terminals?
JDKub is offline   Reply With Quote
Old 10-24-2020, 09:47 AM   #4
Rivet Master
 
2018 25' International
Slidell , Louisiana
Join Date: Sep 2017
Posts: 2,619
Yes start at or near the batteries, you may have to measure more than one lead. Sum them together. Measure and sum all positive or all negative wires.
__________________
Brian
BayouBiker is online now   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
Parasitic Current Numbers uncle_bob Electrical - Systems, Generators, Batteries & Solar 23 06-21-2018 08:17 AM
Parasitic draws and 12V system M and M Boondocking 20 12-13-2015 09:31 PM
Parasitic electrical flow waltc 2009-2015 Flying Cloud 20 09-17-2014 06:44 AM
Parasitic Drain aftermath Batteries, Univolts, Converters & Inverters 9 03-15-2010 10:23 AM
Mystery current drain on coach battery abridges01 Classic Motorhomes 25 02-28-2007 12:22 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 05:20 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.