battery drain when sitting

Welcome to RVForums.com

  • Register now and join the discussion
  • Friendliest RV Community on the web
  • Modern site for PC's, Phones, Tablets - no 3rd party apps required
  • Ask questions, help others, review campgrounds
  • Get the most out of the RV Lifestyle
  • Invite everyone to RVForums.com and let's have fun
  • Commercial/Vendors welcome
Joined
Apr 7, 2021
Messages
2
We have an Aspect Winnie with two coach batteries. The Ford chassis battery drains over time.....any idea where this trickle could come from? If we disconnect battery there isn't a problem so thinking it must be coming from somewhere in the rig. Thx
 
Joined
Nov 3, 2019
Messages
752
Location
Florida
RV Year
2018
RV Make
Newmar
RV Model
CanyonStar
RV Length
39' 11"
TOW/TOAD
Demco KarKaddy 460SS and VW Passat
Fulltimer
No
From Wind and Solar FAQ

"Check if the current drain is real (sounds like it probably is)... If you have a shunt, place your volt meter on a low range (xxx mVolts, or 1-2 volt DC range) and see if you measure a voltage across the shut (it will probably something like 100mV=100 amps or 100mV=500amps or something like that).

You should ensure that each load is turned off normally, then disconnect one fuse/breaker/wire at a time until you find where the phantom load is coming from."

Source : Phantom Drain?
 
Joined
Nov 3, 2019
Messages
752
Location
Florida
RV Year
2018
RV Make
Newmar
RV Model
CanyonStar
RV Length
39' 11"
TOW/TOAD
Demco KarKaddy 460SS and VW Passat
Fulltimer
No
Here is a nice tutorial

 
Joined
Jul 29, 2020
Messages
1,428
Location
AZ
RV Year
1983
RV Make
Alpinelite
RV Length
26'
TOW/TOAD
2016 Ram 1500
Fulltimer
Yes
what is "over time"? Most modern junk has parasitic loads for convenience related items. I got a battery charger for the truck that tows the fifth because it sits for ???? days without running and it makes no sense to idle it for charging the battery.
 
Joined
Nov 15, 2019
Messages
325
Location
Portage, MI
RV Year
2017
RV Make
Newmar
RV Model
Ventana LE 4037
RV Length
40' 11"
TOW/TOAD
2021 Chevy Trailblazer
Fulltimer
No
New vehicles have many, many small electrical components using small amounts. Once there is enough small uses, they add up to a high drain. Very common. The only way to combat it is to either disconnect the batteries entirely (several ways) or have a trickle charger (many choices, including solar) on them.
 
Top