minimum voltage to run A/C

How the electric companies set up their grids, for purposes of this thread and all other AC power consumption threads, is irrelevant. Compressor motors used in this application are single phase motors, run accordingly and require a minumum voltage for a power source. There is a reason the AC manufacturers designate a minimum voltage that the units can run on and not sustain damage. When they design their equipment they are not concerned about the utility company's latest and greatest configuration. As far as Dometic and coleman products, that number is 103VAC. Our units will not even start on 90V. I've been a dealer for Dometic's marine products for almost 20 years and that minimum number has always been 103V. Our digital controls shut off the system if less voltage is sensed for 3 minutes.
Everyone needs to keep in mind that this is an RV forum, not an engineering one.