This reports the operating state of this power module's AC output stage using a set of abbreviated status codes, standby-ready, standby, standby-with-error, standby-with-restricted-error, or unknown, that likely correspond to the module's own internal firmware state machine for its inverter output. It matters for distinguishing a module that's deliberately idle and ready to take load, sbr, from one sitting in an actual fault condition, sbwe or sbwre, which requires very different responses from an operator, one is normal standby behavior, the other needs a technician dispatched. Seeing this shift from sbr(0) to sbwe(2) on a module that's supposed to be actively supplying AC output is a concrete signal that module has developed an output-stage fault.