Originally Posted by daveb
This unit will activate only
when either the Main or
Auxiliary Battery System
exceeds 13.2 volts*.
Maybe your house system was a bit low Geoff???
I think that's only for the automatic connection, and in itself would never jump start the van.
The 1315 has an override that you apply 12v to to force the separator closed- SMB had mine wired to the "start" position on the key, so on every start the house was jumping the starter, one, both, either or neither being dead.
So to jump from the house batteries you could either apply juice to this switch or literally jump the terminals (or the batteries)... in any case the voltage of either set shouldn't matter.
That said, all that is for a separator (1315-200 or BlueSea 400a) which is different from an Isolator, which I'm not sure how to jumpstart with... geoffff.. which do you have and how do you "start the van using the house battery via the isolator"?