I think you may be looking at it from the wrong angle. the battery is rated at 47 amp hours.....therefore 94 amps for 30 mins, 188 amps for 15 mins etc....the only rating on the battery is the amp hour rating, the heaviest load on most aircraft will be the apu crank function. The 75 amp breaker is only for the battery charger (from the WDM). It doesn't limit the output of the APU.....hope this helps!
