Yes, I realized that you were doing this for various good reasons in
your mind. My post was for the benefit of others who might be mislead
into thinking that you had to have a relay rated as high or higher than
your alternator amps and that is not the case.

Mark

Bob Stevens wrote:
> Thanks Mark. My "plan" is to eventually add more trinkets to my van for
> longer, extended stays in unimproved areas,
> and since adding that 4 GA wire from the alt to the SP, that by itself
> opens up the flow opportunity. Just doing
> some advance "thinking" despite what others my think of as "overkill".
> Anyone need a good, used SP1315?
> bob
>
> On Sat, Sep 18, 2010 at 11:34 AM, mark drillock <mdrillock@cox.net
> <mailto:mdrillock@cox.net>> wrote:
>
>     If all you have on the other side of the 1315 is your battery pack
>     and the 100 amp unit is working fine, making it a 200 won't do
>     anything. The batteries will only pull as many amps as they need and
>     as much as the wires allow. Switching to the bigger 1315 won't make
>     more amps flow, if that is the only change you make.
>
>     VW used a 40 amp battery relay with their 90 amp alternator. It is
>     the wire gauge and length that determines the amp flow to the
>     battery, other than the battery demand itself.
>
>     Mark
>
>
>
>