'Best guess' as Samsung's own literature doesn't make any suggestion that it's an 'inverter' as you seem to understand it (and what would be the point?) - it's simply a variable speed compressor - presumably it's PWM, and converts the mains to DC, then 'chops' it to make high frequency AC to vary the speed of the motor.
As I mentioned previously, such a device is MUCH more likely to be damaged by a poor supply than a conventional compressor (which has no electronics to damage).
As no one else seems to have your problems, have you considered that the issue might be with your generator?.