Hey SoundGuy, thanks for the reply.
In my research, I'd never run across the problem with the sine wave, thanks for that information. I don't have a power management device but was considering a Hughes Autoformer.
The A/C does have a hard start and the fan comes on first, then the compressor. The units take the load, they will even reduce rpm's after the initial hit, it's when the load drops off is when the problem of overload arises. The A/C compressor will shut down normally, the fan is still running and the generators rap out. The units don't shut down, they just go off line.
I'm going to test it again tomorrow. When the A/C kicks off, the display on the microwave starts dimming so I don't know if the problem is with one generator tripping first and then the other overloading or if the whole gen system gets overloaded at once.