What Dan said. I usually get a UPS big enough to run all my computer stuff plus the internet connection. The only thing I find strange is the UPS does not like the generator. Perhaps a different model. My power drops out enough to really use the UPS. As Dan said, replace every four or five years or longer.

I find the computer systems last longer when connected to a UPS. Less voltage spike issues I assume.
I also use a UPS on my electronics workbench.

Billy