It now seems to run down to @ 10.0V or so before reporting low voltage.

But isn't this along the lines of getting a bigger can to bail out your leaking rowboat, instead of fixing the leak?

There should be no circumstance (except maybe when actually starting the engine) that your voltage drops much below 12 volts. You have a problem in your car's electrical system (specifically in the charging circuit) that you need to address, otherwise you are likely to find yourself stranded with not only a non-functioning empeg, but a non-functioning car.

tanstaafl.