A vehicle power control system, comprising: a power supply configured to supply a first quantity of power to at least one device configured to consume the first quantity of power based on a first power demand; at least one intelligent device, the at least one intelligent device being configured to determine a second power demand for the intelligent device during a vehicle operation; an intelligent power source configured to receive excess power harvested from operation of at least one other source during portions of a vehicle operation when more power may be available than is being consumed, and store the harvested power for later use; and an energy management system configured to: communicate with the at least one intelligent device regarding the second power demand to coordinate scheduling of power distribution during the vehicle operation; generate a power distribution schedule to account for the first power demand of the at least one device and the second power demand of the at least one intelligent device; direct the first quantity of power to the at least one device according to the first power demand of the at least one device; and direct a second quantity of power to the at least one intelligent device according to the power distribution schedule; wherein the at least one intelligent device is able to reduce power consumption, increase power consumption, assume a standby state, and power off; and is further configured to respond to a command from the energy management system to direct the at least one intelligent device to: reduce power consumption; increase power consumption; assume the standby state, from which the at least one intelligent device can resume operation upon being restarted by the energy management system; or power off. a power supply configured to supply a first quantity of power to at least one device configured to consume the first quantity of power based on a first power demand; at least one intelligent device, the at least one intelligent device being configured to determine a second power demand for the intelligent device during a vehicle operation; an intelligent power source configured to receive excess power harvested from operation of at least one other source during portions of a vehicle operation when more power may be available than is being consumed, and store the harvested power for later use; and an energy management system configured to: communicate with the at least one intelligent device regarding the second power demand to coordinate scheduling of power distribution during the vehicle operation; generate a power distribution schedule to account for the first power demand of the at least one device and the second power demand of the at least one intelligent device; direct the first quantity of power to the at least one device according to the first power demand of the at least one device; and direct a second quantity of power to the at least one intelligent device according to the power distribution schedule; communicate with the at least one intelligent device regarding the second power demand to coordinate scheduling of power distribution during the vehicle operation; generate a power distribution schedule to account for the first power demand of the at least one device and the second power demand of the at least one intelligent device; direct the first quantity of power to the at least one device according to the first power demand of the at least one device; and direct a second quantity of power to the at least one intelligent device according to the power distribution schedule; wherein the at least one intelligent device is able to reduce power consumption, increase power consumption, assume a standby state, and power off; and is further configured to respond to a command from the energy management system to direct the at least one intelligent device to: reduce power consumption; increase power consumption; assume the standby state, from which the at least one intelligent device can resume operation upon being restarted by the energy management system; or power off. reduce power consumption; increase power consumption; assume the standby state, from which the at least one intelligent device can resume operation upon being restarted by the energy management system; or power off.