Question : Problem: How many watts does a UPS draw when powering from a generator

I am in South Africa 220V power, with constant power outages I have purchased a small generator 2500 Watts just to run computers.  I have a 650VA UPS & a 1000VA UPS the manual says they use 390W and 600W respectively.  I just want to confirm that they will infact draw 390W and 600W when powered by a generator as this will influence what equipment I run off my generator.

Answer : Problem: How many watts does a UPS draw when powering from a generator

the easies t way is to measure it, use a wattmeter, or Amps meter and calculate the power used
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