So, I'm trying to do this with a one pole switch, because my experience with the battery cutoff switches has me spooked.

Here's my idea.

Put the cutoff switch in the positive battery cable, before anything else branches off.

Then run a line from the alternator output to ground with some sort of load on it.

That way, when I cut the battery, The alt still has a load to deliver, and it doesn't lose its little mind. I'm thiking of a light or fan as the load.

Is this crazy? In the past I have just run the output from the alt back to the battery (unswtiched) to continue the load.