In an automobile electrical system having an alternator drivingly connected to a vehicle engine the alternator has a polyphase output winding producing a polyphase output in the form of a polyphase alternator voltage for each phase. A method for determining a ground fault within an energy conversion system may include, in part, a comparison of baseline waveform of differential current to a waveform of differential current during operation for a plurality of DC current carrying conductors in an energy conversion system. The user begins providing message content to the communication device by, for example, speaking, entering text, or clicking a shutter of a camera.