This paper will address the usage of combined power and energy management control layers to systematically study the effect of intelligently varying generator ramp rates and its impact on required energy storage in the presence of mission load profiles. The work will utilize a developed notional 4-zone representation of a destroyer-class ship in which there is an energy management layer (composed of a distributed model predictive control) and a power management layer (composed of a distributed droop control). The work will analyze conditions in which the ship must fire a pulsed-power load. The effect of the energy management to leverage available energy storage versus allowing generator ramp-rates to exceed standards in the presences of the aforementioned conditions will be studied to illustrate how the consideration of system-level control is critical in the design cycle.