battery drain when sitting

[Montanabrown]

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

 

[Joe Goodxrvn]

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?

 

[Joe Goodxrvn]

Here is a nice tutorial

 

[Montanabrown]

Thanks, will try!

 

[Buly]

I had the same problem with my Honda CRV. Finally installed a cutoff switch.
Battery cutoff switch

 

[MapNerd]

Radio is on and volume turned all the way down?

 

[Kevin D Pem]

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.

 

[RandyB]

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.