Abstract: The present invention may be embodied as a power supply system for supplying power to a load from a grid power source and at least one auxiliary power source. The power supply system comprises at least one power control system comprising a power integration system, a power management board, a device controller, and a communications sub-system. The communications sub-system configured with at least one wiring assembly operatively connected to the device controller and configured to carry a first set of data and at least one wiring assembly operatively connected to the device controller and configured to carry a second set of data. The device controller operates the power management board at least in part based on the first set of data. The device controller operates the power integration system at least in part based on the second set of data.