I know that in case of a power outage the UPS should tell the systems to shut down cleanly if the UPS' battery is running out of power, as you write in your blueprints-book second edition on page 254.
You need a combination of a UPS that turns back on when the power does (I understand that APC has UPSs that can do this in their non-home models; I'm sure other vendors do as well, and a server whose BIOS allow recovery after a power failure. With that combination you should be able to get what you are looking for. I hope this helps. Evan L. Marcus
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