Run AC's from Inverters or not

[CC_Guy]

Here's another thought.

Your alternator is putting out voltage that is too high or your charger is configured for too low of a charge voltage. If you have battery temperature sensors, they too could contribute to the problem if the batteries are getting warm.

There's simply no logic that would have someone spend engineering time and added complexity to force the inverters to stay in inverter mode when they were supplied a good AC input.