The only real benefit to an invertor type of generator is that it produces good clean stable power. It has nothing to do with the engine RPM and everything to do with the fact the electricity is generated then converted to DC then that DC power is converted back to AC. That conversion process is what produces that nice clean stable power as there is a buffer between the raw power being produced and the actual output end of said generator.
Of course you can get the same effect by simply using a UPS between a conventional generator and any really sensitive electronics.
If all that concerns you is the noise there are plenty of ways to mitigate that.
|