[RipNC]

First, that looks like a Watchdog EMS and not the Autoformer. Have you checked the shorepower with a multimeter to verify the Watchdog report? If the voltage is normally 120 "ish" then it may have just been a transient spike. If normal voltage is that high you might look an actual Hughes Autoformer (not exactly cheap). Even if it was just a spike you may still want an Autoformer.