1. A data center system, comprising: a plurality of data centers for receiving power from a plurality of power sources, at least one power source comprising a renewable off-grid power source that is not connected to an established power distribution grid; and a management system for managing execution of a plurality of computational tasks, the plurality of computational tasks having data components associated therewith, the management system being configured to manage the computational tasks by moving the data components within the data center system based on varying availabilities and costs of power provided by the plurality of power sources, in lieu of moving power provided by the plurality of power sources.