Automated motor vehicle battery voltage protection is provided by setting voltage trip points for increasing engine speed and for shedding selected electrical loads. The system is effected by programming a vehicle body computer which communicates with, and exerts control over, various vehicle system controllers over one or more controller area networks. The body computer is programmed to monitor battery voltage and initiates an increase in engine speed first, and if that fails to restore a minimum battery voltage level, begins shedding loads in a predetermined order.