A system for managing transfer or distribution of energy amongst a plurality of devices. The system includes one or more connectors configured to provide one or more connections to at least one of the plurality of devices, a switching device connected to the one or more connectors and configured to open or close the one or more connections, a memory configured to store energy storage or usage data associated with the at least one of the plurality of devices, and a controller coupled to the switching device and the memory. The controller may receive first data indicative of a request to receive energy, receive second data indicative of a request to unload energy, determine, based on the energy storage or usage data, the first data, and the second data, an energy distribution schedule, and control the switching device to provide or collect energy according to the energy distribution schedule.

The present application relates to the field of underwater power supply technologies, and provides a long-distance underwater power supply system that is applied to a submarine observation system including a plurality of load nodes. The power supply system includes at least one terminal power supply and a plurality of branching nodes. The terminal power supply is sequentially electrically connected to the plurality of branching nodes through a trunk cable, and may output a constant current to the trunk cable. The plurality of branching nodes are respectively connected to at least one corresponding load node, and each of the branching nodes and the corresponding load node are connected to an ocean ground, respectively. The branching node may convert the constant current transmitted from the trunk cable into a constant-voltage current, and output the constant-voltage current to the load node.