When an edge node whose order is lower than that of a primary switch detects a failure of the primary switch, the edge node requests a secondary switch that the secondary switch serves as a host of the edge node itself. In one embodiment a method of producing an energy storage device is provided. A sliding unit is slidably engagable with the track member and slidable between an open position and a closed position. The method of processing a managed account includes receiving customer information; sending the customer information to a site for approval; and checking that information to ensure the information satisfies a compliance criterion. The torque command limit and coefficient values may be determined from the converter input voltage, calculated or detected converter input current and calculated input impedance between a power supply and the converter.