An energy storage and management system (ESMS) comprising: one or more energy storage devices (116, 124, 128) positioned on-board a vehicle and configured to store electrical energy; a power electronic conversion system having a plurality of energy ports, the power electronic conversion system comprising a plurality of DC electrical converters (104, 106, 108), each DC electrical converter (104, 106, 108) configured to step up and to step down a DC voltage, wherein: each of the plurality of energy ports is coupleable to each of the one or more energy storage devices (116, 124, 128); and each of the plurality of energy ports is coupleable to an electrical charging system located off-board the vehicle; and a controller configured to: detect if the electrical charging system located off-board the vehicle is connected to one or more of the plurality of energy ports, and to determine at least one of voltage and frequency of the electrical charging system; determine a first condition of a first energy storage device and a second condition of a second energy storage device, wherein the first and second energy storage devices (116, 124) are each connected to respective energy ports (114, 120) of the power conversion system; determine a power split factor based on the first condition and on the second condition; and selectively operate the plurality of DC electrical converters (104, 106, 108) in the ESMS based on the power split factor and based on the at least one of the voltage and frequency of the electrical charging system so as to regulate power to the first and second energy storage devices wherein the condition of the first energy storage device and the condition of the second energy storage device comprise one of a state-of-charge and an amount of cell imbalance. one or more energy storage devices (116, 124, 128) positioned on-board a vehicle and configured to store electrical energy; a power electronic conversion system having a plurality of energy ports, the power electronic conversion system comprising a plurality of DC electrical converters (104, 106, 108), each DC electrical converter (104, 106, 108) configured to step up and to step down a DC voltage, wherein: each of the plurality of energy ports is coupleable to each of the one or more energy storage devices (116, 124, 128); and each of the plurality of energy ports is coupleable to an electrical charging system located off-board the vehicle; and each of the plurality of energy ports is coupleable to each of the one or more energy storage devices (116, 124, 128); and each of the plurality of energy ports is coupleable to an electrical charging system located off-board the vehicle; and a controller configured to: detect if the electrical charging system located off-board the vehicle is connected to one or more of the plurality of energy ports, and to determine at least one of voltage and frequency of the electrical charging system; determine a first condition of a first energy storage device and a second condition of a second energy storage device, wherein the first and second energy storage devices (116, 124) are each connected to respective energy ports (114, 120) of the power conversion system; determine a power split factor based on the first condition and on the second condition; and selectively operate the plurality of DC electrical converters (104, 106, 108) in the ESMS based on the power split factor and based on the at least one of the voltage and frequency of the electrical charging system so as to regulate power to the first and second energy storage devices wherein the condition of the first energy storage device and the condition of the second energy storage device comprise one of a state-of-charge and an amount of cell imbalance. detect if the electrical charging system located off-board the vehicle is connected to one or more of the plurality of energy ports, and to determine at least one of voltage and frequency of the electrical charging system; determine a first condition of a first energy storage device and a second condition of a second energy storage device, wherein the first and second energy storage devices (116, 124) are each connected to respective energy ports (114, 120) of the power conversion system; determine a power split factor based on the first condition and on the second condition; and selectively operate the plurality of DC electrical converters (104, 106, 108) in the ESMS based on the power split factor and based on the at least one of the voltage and frequency of the electrical charging system so as to regulate power to the first and second energy storage devices wherein the condition of the first energy storage device and the condition of the second energy storage device comprise one of a state-of-charge and an amount of cell imbalance.