A multiplicity of uninterruptible power supply (UPS) devices may be equipped with a plurality of sensors which report on the state of various operational parameters of the UPS devices to a registry device. Output of the registry device may be displayed on a dedicated GUI and/or written to log files at a monitoring station. In the event that one or more sensors reports a parameter to the registry device which is indicative of a malfunction of one or more of the UPS devices, examination the registry device output may indicate which UPS device or devices is/are malfunctioning. Related embodiments, apparatus, systems, and methods are also discussed.