I was thinking initially why the AGS would not have started the Gen when coach batteries hit a certain low voltage set point.....assuming OP had it set up for that low voltage operation point. "If" the BCC coach disconnect latch relay failed open during the trip.....then perhaps the AGS electronics was disabled? In that situation, even if the AGS somehow started the Gen (off coach batteries), with open coach battery latch relay, no converter charge current would reach the coach batteries anyway. If this BCC latch relay was a problem, then other items should have stopped working too (like radio, cameras etc), but I am not familiar with Hurricane configs. Maybe some other simpler problem like bad connection(s) caused this; perhaps all battery terminals should be cleaned and tightened if one looks degraded.
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