hi,

yes VW did sell westies with aux battery installed, perhaps those
living in the states did not get them, but they were offered
elsewhere. Fancy that eh?

I believe you can see wiring for second battery in the Bentley manual
(staring at page 97.137). If you don't have a manual, take a look at
this page for some ideas

http://www.westfaliat3.info/html/westfalia_t3_downloads.html

and yes, there are a number of different ways of doing it yourself,
from a simple relay or solenoid through to an "automatic charging
relay" .

alistair

---- Mark Hineline <hineline@OCOTILLOFIELD.NET> wrote:
> There are so many permutations (and problems) with providing auxiliary
> power that I wondered how Westies were equipped when they left the
> dealer's lot, and how they performed as campers when new (and
> presumably fitted with only one battery).
>
> Mark