The a/c is deliberately not wired to the
ups. If it was, the batteries would die in 15 minutes!

If it were the inductive load of the compressor and fan switching on and
off would probably kill your UPS long before the batteries were
exhausted. Typical UPSs aren't designed for that kind of electrical
load, if you recall your freshman science there are all 10 Amp loads
aren't created equal.

-Walden


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