A transport refrigeration unit (TRU) direct current (DC) architecture , comprising: a communications bus ; a DC power bus ; first and second voltage control units (VCUs) respectively comprising a DC/DC converter coupled to the DC power bus and a local controller coupled to the communications bus and to the DC/DC converter; an energy storage unit configured to provide to the DC power bus a quantity of DC power via the DC/DC converter of the first VCU in accordance with control exerted thereon by the local controller of the first VCU; a DC powered load configured to receive from the DC power bus a quantity of DC power via the DC/DC converter of the second VCU in accordance with control exerted thereon by the local controller of the second VCU; a DC power generator coupled to the DC power bus and controllable by a generator controller coupled to the communications bus ; a third VCU comprising a DC/DC converter coupled to the DC power bus and a local controller coupled to the communications bus and to the DC/DC converter; a secondary DC powered load configured to receive from the DC power bus a quantity of DC power via the DC/DC converter of the third VCU in accordance with control exerted thereon by the local controller of the third VCU; a feedback loop coupled to each local controller ; and a control unit disposed in signal communication with each of the VCUs via the communication bus and configured to control operations of each of the local controllers in accordance with data retrieved from the corresponding feedback loop, wherein the control unit is configured to issue DC/DC power conversion commands to each of the local controllers and the generator controller and to issue DC power generation commands to the generator controller based on differences between target DC/DC power conversion and generation data and actual DC/DC power conversion and generation data. a communications bus ; a DC power bus ; first and second voltage control units (VCUs) respectively comprising a DC/DC converter coupled to the DC power bus and a local controller coupled to the communications bus and to the DC/DC converter; an energy storage unit configured to provide to the DC power bus a quantity of DC power via the DC/DC converter of the first VCU in accordance with control exerted thereon by the local controller of the first VCU; a DC powered load configured to receive from the DC power bus a quantity of DC power via the DC/DC converter of the second VCU in accordance with control exerted thereon by the local controller of the second VCU; a DC power generator coupled to the DC power bus and controllable by a generator controller coupled to the communications bus ; a third VCU comprising a DC/DC converter coupled to the DC power bus and a local controller coupled to the communications bus and to the DC/DC converter; a secondary DC powered load configured to receive from the DC power bus a quantity of DC power via the DC/DC converter of the third VCU in accordance with control exerted thereon by the local controller of the third VCU; a feedback loop coupled to each local controller ; and a control unit disposed in signal communication with each of the VCUs via the communication bus and configured to control operations of each of the local controllers in accordance with data retrieved from the corresponding feedback loop, wherein the control unit is configured to issue DC/DC power conversion commands to each of the local controllers and the generator controller and to issue DC power generation commands to the generator controller based on differences between target DC/DC power conversion and generation data and actual DC/DC power conversion and generation data. <EOS>