Vanagon EuroVan
Previous messageNext messagePrevious in topicNext in topicPrevious by same authorNext by same authorPrevious page (April 2000, week 1)Back to main VANAGON pageJoin or leave VANAGON (or change settings)ReplyPost a new messageSearchProportional fontNon-proportional font
Date:         Mon, 3 Apr 2000 13:27:33 -0700
Sender:       Vanagon Mailing List <>
From:         BRENT CHRISTENSEN <bchristensen@INFOGENESIS.COM>
Subject:      Re: Battery Under Back Seat
Comments: To: Jay L Snyder <Jay.L.Snyder@USA.DUPONT.COM>
Content-Type: multipart/alternative;

Yes - you need to isolate the two batteries from each other, otherwise one will drain the other if there is even the slightest difference in voltage. (They will try to equalize each other). This can have catastrophic effect due to the amount of current that can suddenly surge through the wiring.

Traditional "battery isolators" don't work well in a Vanagon due to the voltage drop. (Didn't work well in my old Jeep, either - wish I'd thought about the relay trick back then). You need to separate the two batteries with a stout relay (I have a 75 amp relay) that is only switched on when the alternator is kicking out juice. Then power all your accessories from your aux. battery by shunting to the hot side of the #3 fuse terminal.

Takes a bit of crawling around and snaking wires, but well worth it. I wish I'd been willing to give up the space under the seat for a pair of golf cart batteries!

Brent Christensen '89 GL Syncro Westy Santa Barbara, CA

> -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf > Of Jay L Snyder > Sent: Monday, April 03, 2000 10:08 AM > To: vanagon@GERRY.VANAGON.COM > Subject: Battery Under Back Seat > > > I am thinking about installing a battery under the rear seat by simply > running a heavy wire to the starter (which would in turn > connect it to the > existing battery) and grounding to engine or chassis. Would > I need fusible > link/fuse on this wire? What gauge wire? I realize this > will only give me > additional power when cranking or with ignition switch on. This setup > seems too easy--am I missing something? > Jay >


Back to: Top of message | Previous page | Main VANAGON page

Please note - During the past 17 years of operation, several gigabytes of Vanagon mail messages have been archived. Searching the entire collection will take up to five minutes to complete. Please be patient!

Return to the archives @

The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.

Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.