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

Bob Stevens wrote:
> Mine are good to go. After 2 years use, quite frequent camping for several
> days at a time,
> since I retired 1/09 and have been on the road a lot.
> All 4 are within 12.84 to 12.86 volts so my kitchen//fridge "issues" are
> elsewhere. I'm
> replacing the Sure Power 1315 with a 1315-200 as my motor has a 120amp
> alternator
> now and the 1315 is only "good" to 100 amps. I must have a fuse problem, or
> perhaps
> a Vitrifrigo problem, but don't know the answer to that yet.
> This battery set up is working well for me.
> bob
>