On Feb 2, 2:33�pm, "Carl Byrns" wrote:

Apparently GM was going to 48 volts for the 2006 model year, but backed off
mostly because of the circuit protection issue.

-Carl

Carl et all

The 48 volt figure is the nominal battery voltage, 4 X 12, closest to
52 volts which is the nominal voltage at which one gets shocked. IOW
the maximun safe voltage to work with before the voltage becomes a
shock hazard. There are of course exceptions to this. The kickback
from an inductance load can be many times the 12 volts that we
presently are accostomed to working with.

Also the 48 volt figure is not the maximun charging voltage when
charging a 48 volt system. eg the charging voltage for a 12 volt
system is 13.5 to 14.X something.

I read all this stuff perhaps 20 years ago when talk of higher voltage
Automobile Electric Systems was started. I don't remember the source
of the documentation. Probably a government publication.

Bob AZ