An off-board load power management system for an electrified vehicle is provided. The system may include a DC-to-AC inverter for providing power to auxiliary loads. Using a manual selector, an operator may select an amount of power to be allocated for inverter use at all time during vehicle operation. A controller may guarantee the selected amount of power is available for inverter use and control a generator accordingly. The controller may manage the distribution of power from a battery and/or generator to the powertrain and other vehicle accessories to ensure the selected amount for the inverter always remains available.