In case you didn't see my separate update, it seems that the problem has been solved. A bad Battery Temperature Sensor was preventing the inverter/charger from working properly. As soon as I unplugged it everything went back to normal. Of course this was discovered as I was starting to remove the Trace unit to replace it with my brand new Magnum unit.
So, today's lesson, check the BTS for proper operation before ordering a new inverter/charger.
Thanks to all that contributed.
tcbrow's post in Not charging house bank was marked as the answer