I already have the stock Westy battery isolating relay setup.  And with an
isolator, I would still need to add a circuit for the times I want the two
in parallel.
Edward

At 05:38 PM 12/4/2003, you wrote:
>Why not just put a battery Isolator in. It will allow you to charge both
>batteries without drawing power from on another. The problem using a
>switch to select the battery is if you forget. That said I don't have a
>need to use both batteries at the same time so there may be a better way.
>
>JFF
>
>http://www.smithae.com/surepower.html
>
>>I was looking at a way to hook the aux and vehicle batteries of the Westy
>>together.  I have a charger set up on the aux batt, so that it gets charged
>>whenever the vehicle is plugged in.  I would like to connect the two so
>>that the vehicle batt can share in that charging when needed.  Or let the
>>aux batt boost the vehicle batt when needed.  So I thought, there's already
>>a relay in place to do this.