Howdy back and thanks for the welcome and response.
The last time it happened, my wife heard a click and the sound on the tv momentarily went off. When she got up to look, the inverter light was on and stayed on for less than a minute. Then the inverter went off and the charger came back on, the batteries were still at 100%. The AC input lights never went off so apparently we never lost shore power. It was daytime so we didn't have any lights on. Don't know if the battery voltage dropped.
Read the troubleshooting information in the manual and this issue wasn't addressed. And the one thing we have learned the hard way is not to wait, if at all possible, until it breaks!
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