The sensor is rated for a max of 900 amps, but has a target reading of 300 amps.

And yes, the brushed permanent magnet motor I'm controlling is rated for 8 kw cont and 15 kw peak at 48 volts.

I realize most people are just using a shield because they only need to provide a small current in contrast to what I need.

The Lem Hal 300-s has an output of +/- 4 volts at 300 amps, and the controller I'm building will have a max of 300 amps, so at 375 amps it is 5 volts.