If you want to use an isolator, get the model 1202R from
Sure Power.
That one works very well with the 90 amp vanagon alternator.
I'm suspicious of the low-cost brands (I wouldn't get one of those),
but the Sure Power has worked for me for many years without any glitches.
Website from Sure Power: (also explains benefits of isolators over relays)
http://www.surepwr.com/index.html

Harald
'90 westy

----------
> From: Dan Fleming <ddffpc@HOME.COM>
> To: vanagon@GERRY.VANAGON.COM
> Subject: Isolators
> Date: Tuesday, December 07, 1999 9:50 AM
>
> So, the JCWhitney catalog sells battery isolators, but lists a special
> stock number, fortunately cheaper than the rest, for VW vans only. These
> are for using 2 batteries, etc.
>
> Anyone know what is special about the VW that they have to make a
> special one for it?
>
> DDF