Abstract: An apparatus for selectively coupling a load to a grid power source and an inverter that is fed electric power by an alternate power source includes a first node coupled to the load. A grid sensor senses a state of the grid power source. A grid relay couples the grid power source to the first node when in a closed state and decouples the grid power source from the first node when in an open state. An inverter relay couples the inverter to the first node when in a closed state and decouples the inverter from the first node when in an open state. A controller is programmed to: cause the grid relay and the inverter relay to closed when the grid sensor indicates available grid power and cause the grid relay to open when grid power is not available. A communications circuit senses a current state of the controller and wirelessly communicates a change of state of a selected one of the grid sensor and the controller to a remote device.

Abstract: An apparatus for selectively coupling a load to a grid power source and an inverter that is fed electric power by an alternate power source includes a first node coupled to the load. A grid sensor senses a state of the grid power source. A grid relay couples the grid power source to the first node when in a closed state and decouples the grid power source from the first node when in an open state. An inverter relay couples the inverter to the first node when in a closed state and decouples the inverter from the first node when in an open state. A controller is programmed to: cause the grid relay and the inverter relay to closed when the grid sensor indicates available grid power and cause the grid relay to open when grid power is not available;. A communications circuit senses a current state of the controller and wirelessly communicates a change of state of a selected one of the grid sensor and the controller to a remote device.