When choosing a UPS for an installed system, the common question from the Owner is "How long will this model keep the system on?"
The answer, of course, is something like, "That depends upon how much you use it."
I never did figure out an accurate way to calculate that answer.
Umm. Get a Genny?
Really, a UPS is to keep the computer in the mix engine happy. Not to power the rig. Size (and cost) of a UPS seems to goes up exponentially with the current draw and run time.
Anything "sizeable" that needs constant power really needs a generator/UPS combo.
Chris.
