Thanks Crayfellow. I looked at the Mauch. Definitely what I need. I went ahead and tried it the way I described above with the hk power module and it worked as I suspected. measures voltage fine, current measure is just what the electronics are drawing. Maiden flight was a success. 32 min...
Well, the plan is, going to make a main battery connection to the pdb with some 10 awg wire and xt90. Going to tap the power module to the board on one side for power for the pixhawk if it will work and use another 5 volt bec to the servo rail for backup. We'll see if it works.
Ok, so I have an hk power module to provide voltage to a pixhawk. This thing has xt60 connectors and fairly small wire. My setup at 100% could pull 106 amps. I know I probably won't ever draw that much current but It's possible none the less. Could I make a heavier battery connection harness...