A power distribution system for regulating energy transfer from a source includes a source controller responsive to a source sensor that provides feedback including a signal indicative of the voltage across the source terminals; a source disconnect device responsive to a control signal from the source controller for electrically connecting or disconnecting the source from the source terminals, wherein the source controller interrupts the supply of power by opening the source disconnect device when voltage is measured across the source terminals; a load disconnect device for electrically decoupling the load from the load terminals; and a logic device in the source controller for determining whether the source disconnect device is to be opened to interrupt the electrical connection between the source and source terminals based on a predetermined set of conditions including whether the change in voltage across the source terminals in respect to time falls outside a predetermined range.