Embodiments of determining power to be supplied to a load are disclosed. In one embodiment, the method includes determining an amount of power to supply to a load included in a first system having a plurality of loads, using a relationship between a change in the voltage provided by a power source to the first system caused due to a current drawn by one or more other systems coupled to the power source and a corresponding change in current supplied by the power source to the first system monitored over a predetermined time interval, to reduce a magnitude of the change in the voltage resulting from the power source, and causing the determined amount of the power to be supplied to the load.