I don't have the same setup as yours since I have the Onan but as I recall there is a warning in the manual about trying to run the microwave while the A/C is running or vice versa. Simply not enough power to do both at the same time on a 30 amp system and 3000 watt inverter with the startup requirements of the A/C. As I recall, the manual states the A/C will automatically shut down if you do that.
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