OK inverter. Many people type inverter when they mean converter.
I guess what you're saying is that your converter was on the bad leg and therefore didn't charge the batteries so the inverter eventually complained due to low battery?
I discovered that many times it's the cable plug end on the cord that causes the problem with 50 amp service. Keep all 4 male spades shiny brass color and the problems seem to go away. I keep a small wire brush and some emery paper in the camper all the time.
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2017 Voltage 3970, Epic, Full Paint
2015 Ford F350 DRW CC 4X4
2016 Kawasaki Teryx 4
4 grandkids, 1 Yellow Lab, 1 Kubota Tractor