Date: Thu, 21 Apr 2022 10:23:29 -0400
Reply-To: Tom C <thomas.casal@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Tom C <thomas.casal@GMAIL.COM>
Subject: Re: Parasitic drain
In-Reply-To: <BL0PR05MB4916F83988CF25559A751B76A0F49@BL0PR05MB4916.namprd05.prod.outlook.com>
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Thanks Dennis… battery load test looks pretty complicated. I’ll see if I
can figure out how to do it.
It’s a brand new interstate 95ah agm from Costco. I’m kinda thinking I
shoulda got the 160ah diehard from advanceAuto now. From what I’m reading
fully charged is between 12.7 and 13. 12.2 to 12.5 start thinking about
charging and 11.9 is shut it down.
Now this has gone on for a couple years and numerous batteries that
something was drawing my batteries down faster than 5% a month. I had
everything unplugged except the darn tf because it was turned off, I
figured it wasn’t drawing anything and my battery was still draining faster
than it should. Finally did the amp test at the battery and noticed the
drop In draw when I pulled the fuse for the tf and was like duh. It may be
normal for a truck fridge to have a slight draw when it’s off. I emailed tf
to see if it’s normal. I may just add a switch for the fridge if it’s gonna
have a tiny lid on the battery. Thanks again Dennis. Tom
I’m just pretty sure I cleaned up all the burnt wires and I don’t have a
bad wire connected to the house battery anymore, so I can confidently
install the dash and hit the road again. Hopefully all the wires I tucked
up in there fit, fingers crossed I put my 5 channel amp up under the dash
above the glove. Put the battery in the water tank area. I never used it
anyway. Going for maximum interior storage.
On Thu, Apr 21, 2022 at 8:35 AM Dennis Haynes <d23haynes57@hotmail.com>
wrote:
> I would start with a load/capacity test of the battery. A/H readings that
> small can even be induced by meter error or noise. Also, when any lead acid
> type battery comes off charge the surface charge-peak voltage will always
> drop due to internal discharge and the chemical activity coming to rest and
> cooling down.
>
> Dennis
>
> -----Original Message-----
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of Tom C
> Sent: Thursday, April 21, 2022 8:05 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Parasitic drain
>
> What’s up fellas, sorry to bother you all In the am. I have the dash out
> rewiring everything and trying to track down a parasitic drain on the house
> battery and I found out my truck fridge is drawing like .017 when it’s
> turned off, really .013 because I think the battery constant is drawing
> .004. So when I have my mppt plugged in and the truck fridge I’m at about
> .03 amp draw which is eating up almost a volt in 24hours. Is it normal for
> the truck fridge to draw like that when powered off or do I have a short
> somewhere in the fridge? Thanks for any and all assistance. Peace tom
>
