Mark,
Yes, I agree. With the setup you described, one could use
a stronger than 40 amp relay without overloading the thin stock
trigger wires, if one desires.
I wonder if everyone understands what you described.
I think it's a good idea, if installed correctly.
Harald
'90 westy

Mark wrote:
> There is of course a finite limit to the trigger circuits fan-out
> capability but I have no idea what it is. I have had this concern myself
> when adding a second battery. A simple way to avoid increasing the
> current drain on the trigger circuit is to not use the trigger circuit
> for the added relay. Just connect a wire from the high current output of
> the stock relay to the trigger circuit input on the second relay. This
> small added load to the stock relay would be very minor and this method
> helps isolate the stock wiring from the high current auxiliary battery
> wiring.
>
> Mark Drillock
>
> harald_nancy wrote:
>
> > I am mostly concerned about the relay trigger
> > circuit. I would not want to overload it, with
> > a too heavy "industrial" type of relay.
> > Personally, I would rather that the breaker
> > shuts off once in awhile than risk overloading
> > the trigger wires with too big a relay.
> > And as you once said, a deep
> > cycle should not be charged too fast anyway.
> > My main concern is not to damage anything that is stock,
> > in this case, the wiring harness with the trigger wires.