I actually use an APC 7.5KVA unit that runs my environment for about 20 minutes. I have run it on a generator without issue. The larger units like this allow you to define the frequency range for input, outside of which it will switch to its inverter in an AC-DC-AC flow. The smaller units, under 2.2K, don't have the same capabilities and might be affected by generators. My current gen is a 7.5KVA unit as well.
FYI - you can see my network environment here - scroll about 3/4 down the page.
I've been using this unit since 2010, purchased refurbished with fresh batteries.
Glenn
_________________________
Actually I
am a Rocket Scientist!
