I have the opposite problem.

I want to find a 100 amp, zero center. amp meter to monitor my overall
system..

My alternator and/or charer/invertor put out around 100 amps at the
beginning of a charge, while various tools and appliances draw as much as
10-15 amps each and can total, at times, 30-40 amps.

I don't have a sophisticated battery monitor system, but would like to
monitor the net gain or loss from the battery bank..

Right now I have a 100 amp meter that just drops below zero when the charge
is greater than the current being used. Not very accurate and may not be
good for the meter movement.


--
Steve
s/v Good Intentions