With the shunt resistor modified, which can be done with either a bypass resistor or a custom circuit board, the only other change is to upgrade the 100 A fuse near the battery for a larger size.

If it’s DC, the easiest way is to use a shunt resistor and measure the voltage ... an amplification circuit, and the ability to be “zero adjusted” to null output voltage offsets.

The process can be simplified with special circuit arrangements called current-shunt monitors, which are offered as standard ICs. These devices sense the voltage across a shunt resistor and ...