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Adding a second auxiliary battery to a Westfalia Camper



 
 
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  #1  
Old October 24th 05, 08:24 PM
Colm
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Default Adding a second auxiliary battery to a Westfalia Camper

Hi
I need to add a 2nd auxillary battery to my 83 Watercooled westfalia
camper. I will be using it primarily to run my laptop and maybe a
light.

I understand that the battery will fit under the driver's seat. I
ordered an aux. battery kit from gowesty but I have a few questions.

If I have two batteries do I need an Isolator?

Here's someone saying I do.
"A dual-battery-relay is a simple switch,
disconnecting the two batteries, when the engine is turned off.
But the moment the relay reconnects the batteries, the
drained battery robs power from the starting battery.
This sudden transfer of current from one battery to another
can damage batteries, and shorten their life.

A solenoid will disconnect batteries form one another, but the second
the solenoid reconnects the batteries there is a sudden discharge from
the main battery to the aux. This shortens battery life and can leave
you with two dead batteries or worse - a fire."

I want to charge the auxiliary battery when the engine is runnig.
I don't want the auxiliary battery to rob current from the main battery
as described above.

Do I have to have both batteries connected to each other?
Why don't I just connect the auxiliary directly to wherever the main
battery gets its source from.?

I'm looking for the best, simplest and most inexpensive solution. Any
ideas?

How do I hook up some sort of voltage indicator so I can see what kind
of charge the aux is holding?

I have looked at the solution at vanagon.com but need more info.

Thank

Ads
  #2  
Old October 24th 05, 08:52 PM
SWP
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Posts: n/a
Default Adding a second auxiliary battery to a Westfalia Camper

Hey,
There are two schools of thought on this one...Yes, there is a Switch
kit available (try www.BusDepot.com) that allows a second battery. it
is isolated via a relay and charges when the ignition switch is on. Or
you can go with the Isolater option. Both work well. Remember though
if you install a second battery for auxillary items, you really should
use a Deep Cycle RV battery...Sounds like you should use the Isolator
Option for the application your wanting. Try (
http://www.geocities.com/harald_nancy/ ) for more second battery
options and info..Good luck

On 24 Oct 2005 12:24:06 -0700, "Colm" > wrote:

>Hi
>I need to add a 2nd auxillary battery to my 83 Watercooled westfalia
>camper. I will be using it primarily to run my laptop and maybe a
>light.
>
>I understand that the battery will fit under the driver's seat. I
>ordered an aux. battery kit from gowesty but I have a few questions.
>
>If I have two batteries do I need an Isolator?
>
>Here's someone saying I do.
>"A dual-battery-relay is a simple switch,
>disconnecting the two batteries, when the engine is turned off.
>But the moment the relay reconnects the batteries, the
>drained battery robs power from the starting battery.
>This sudden transfer of current from one battery to another
>can damage batteries, and shorten their life.
>
>A solenoid will disconnect batteries form one another, but the second
>the solenoid reconnects the batteries there is a sudden discharge from
>the main battery to the aux. This shortens battery life and can leave
>you with two dead batteries or worse - a fire."
>
>I want to charge the auxiliary battery when the engine is runnig.
>I don't want the auxiliary battery to rob current from the main battery
>as described above.
>
>Do I have to have both batteries connected to each other?
>Why don't I just connect the auxiliary directly to wherever the main
>battery gets its source from.?
>
>I'm looking for the best, simplest and most inexpensive solution. Any
>ideas?
>
>How do I hook up some sort of voltage indicator so I can see what kind
>of charge the aux is holding?
>
>I have looked at the solution at vanagon.com but need more info.
>
>Thank

  #3  
Old October 24th 05, 09:10 PM
external usenet poster
 
Posts: n/a
Default Adding a second auxiliary battery to a Westfalia Camper

Don't know if you have purchased the new batteries yet, but I would go
with Optima type sealed, gel batteries. Several brand names now, but
they are all top notch. You will pay more for them, but they are
smaller with more CCA than lead/acid.

I just put dual batt's in my boat, with an isolator, and 2 blue top
Optima's from COSTCO. the isolator was very inexpensive piece in the
overall project. You could also look at Perko manual switches. I want
to be able to start the boat and both charge, and run the stereo and
lights without worrying if I can start up and leave.

I could almost fit 2 Optima's in the space of the one L/A battery that
was there before, and I don't have to worry about acid coming out in
the hull of my boat.

Rod
98 Jetta TDI
93 Jetta III
90 Malibu Skier

SWP wrote:
> Hey,
> There are two schools of thought on this one...Yes, there is a Switch
> kit available (try www.BusDepot.com) that allows a second battery. it
> is isolated via a relay and charges when the ignition switch is on. Or
> you can go with the Isolater option. Both work well. Remember though
> if you install a second battery for auxillary items, you really should
> use a Deep Cycle RV battery...Sounds like you should use the Isolator
> Option for the application your wanting. Try (
> http://www.geocities.com/harald_nancy/ ) for more second battery
> options and info..Good luck
>
> On 24 Oct 2005 12:24:06 -0700, "Colm" > wrote:
>
> >Hi
> >I need to add a 2nd auxillary battery to my 83 Watercooled westfalia
> >camper. I will be using it primarily to run my laptop and maybe a
> >light.
> >
> >I understand that the battery will fit under the driver's seat. I
> >ordered an aux. battery kit from gowesty but I have a few questions.
> >
> >If I have two batteries do I need an Isolator?
> >
> >Here's someone saying I do.
> >"A dual-battery-relay is a simple switch,
> >disconnecting the two batteries, when the engine is turned off.
> >But the moment the relay reconnects the batteries, the
> >drained battery robs power from the starting battery.
> >This sudden transfer of current from one battery to another
> >can damage batteries, and shorten their life.
> >
> >A solenoid will disconnect batteries form one another, but the second
> >the solenoid reconnects the batteries there is a sudden discharge from
> >the main battery to the aux. This shortens battery life and can leave
> >you with two dead batteries or worse - a fire."
> >
> >I want to charge the auxiliary battery when the engine is runnig.
> >I don't want the auxiliary battery to rob current from the main battery
> >as described above.
> >
> >Do I have to have both batteries connected to each other?
> >Why don't I just connect the auxiliary directly to wherever the main
> >battery gets its source from.?
> >
> >I'm looking for the best, simplest and most inexpensive solution. Any
> >ideas?
> >
> >How do I hook up some sort of voltage indicator so I can see what kind
> >of charge the aux is holding?
> >
> >I have looked at the solution at vanagon.com but need more info.
> >
> >Thank


 




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