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What is the difference between online ups and offline ups?

Answer Posted / sub surjeet singh

in on line UPS out put is allways taken from invertor hence
o/p is isolated from input and there is no effect of input
voltage varriation in output.
in off line UPS when AC mains is present in the input that
is taken from output and when AC mains in input cut off
than change over to invertor and output is taken from
invertor. hence when ac mains is present output of UPS is
effacted when input mains voltages up or down.

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