Battery Relocation

I'm pretty opinionated about all this. First, why is it so important to have the starter dead? When was the last time one of those cables shorted? (And if it does you have a disconnect!!) You STILL need a HEAVY cable for the alternator and to feed power to the car. Just reconsider

But if you don't, I believe that "one wire" alternators are as much trouble as they avoid. If you use a "3 wire" or such, you can kill the field wiring and kill the output, and it is no longer a problem

another issue with "one" wire units is that because the v sensing is also on the one wire, they must have a MUCH larger charge wire than the same amp "3 wire" units.

Use a good quality FOUR terminal disconnect. Use the auxiliary terminals to kill something (even with a relay) that will kill the ignition/ compulter (if EFI) etc. You MUST wire this up in such a way that the alternator does not keep the engine running