At 07:19 AM 9/14/2011, David Beierl wrote...

>Two in parallel would give you 150 amps, continuous rating, surely
>enough for jump starting just about anything given that the big load
>lasts only a few seconds.

It doesn't work that way. At those loads, any change in contact
resistance is significant. You only get 150 A if the contact resistance
is _exactly_ the same between both sets (and it won't/can't be),
otherwise one side will end up carrying more current.

Peak load when jump starting is more than 150A, that's sounds like the
sustained load when turning a small car engine (jump start an American
V8 in the winter, and it's going to be more, still).

They make bigger Powerpoles (up to 310 A capacity). If more than 75 is
needed, just pick a bigger set.

PP75=75A
PP120=120-230A
PP180=180-310A

(the PP120 and PP180 have heftier contacts available now than when they
were first developed, which is why the max capacity ratings don't match
the model #'s)