Originally Posted by BobTurner
Buss voltage = 14+ volts, alternator 1 is on-line
Buss voltage =13.2 volts, only alternator 2 is on-line
Buss voltage less than 12.8 volts, both alternators are off.
As Bob pointed out, no shunt is needed to monitor your electrical power generation. While current output is an interesting value, it provides little over buss voltage as far as what you need to know while flying.