Will I be able to use the AVR Intelligent LCD Mini-Tower with my portable generator?
I don’t see why not. The purpose of a generator is to provide A/C power to any device that would require it.
It should’t be a problem since most modern generators furnish clean power. An older generator might have frequency variations that would cause the UPS to run off the battery instead of the generator.
Yes, although I recommend an inverter generator, if you can afford one. Not only are they quieter and use less fuel, but the inverter gives a more stable voltage and AC current cycle.