And, in my case, the voltage drop problem might actually be a benefit. Many AGM batteries only like to be charged to 13.7 Volts (the charging system is set to 14.5(ish) volts). Of course, installing a thicker wire is a good idea. In that case, a large diode could be used to drop the 14.5 to the 13.7 that many AGMs like. The standard .7 Volt drop of a common diode is close enough. Jon 82 Diesel Westy On Thu, 29 Jun 2006, mark drillock wrote: > This has been talked about for years, many have tried it. The main > weakness is that the long stock wire runs that supply +12 to the relay > reduce the charging voltage enough that the aux battery never fully > charges. This problem is made worse when the fridge is running on 12 > volts at the same time you are trying to charge the battery. For those > with the stock battery under the passenger seat, the easy answer for > this weakness is to run a wire from the main battery directly to the > relay, instead of using the original feed wire from the dash to the relay. > > Mark > > jon wrote: > > >Maybe someone already said this, but I was looking in the Bentley at the > >80-85 Westy schematic. Seems an aux. battery could be easily added: > > > >The Refrigerator 12-volt heater relay could be used as the battery > >disconnect (well, if it's big enough). Simply connect the aux bat (through > >a fuse) to terminal 30. Move the connection from terminal 87 to 30 (this > >supplies power to the water pump, LEDs, etc) are you are almost set. > > > >The center light would probably need to be wired into this system, instead > >to the door/courtest light circuit. You'd also want to wire your stereo > >into this circuit. > > > >Hmmm, I've got a nice AGM battery just waiting to be wired in. Hmmm. > > > >Add a trickle charger for winter, and all is set. > > > >Thoughts? > > > >Jon > > > > > > > > > |
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Vanagon mail messages have been archived.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 @ gerry.vanagon.com
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.