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UPS, after a long power outage, which models will restore power to the connected load?

Our office building occasionally has complete blackouts for hours. Our UPS's work fine for short time power outages, but after a prolonged power outage and upon utility power restored, some of our UPS don't restart themselves and don't send power to the connected load. I have to go to the office and manually press the on/off button on the UPS, yikes.

I asked APC tech support and they wrote vaguely that their cheaper BackUPS series wont restart, but their SmartUPS models will. I couldn't find any product info on their websites that addresses this topic on restarting after long power outages, which I find disturbing since I dont think I'm the only person to have this question/concern.

Question: How do I tell which UPS brands/models offer ability to restart itself as expected after a long power outage? I'm open to other brands such as TrippLite, CyperPower, etc,

SOLUTION

Philonator

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SOLUTION

Tony Giangreco

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JReam

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Thanks. The APC Smart-UPS model name appears to be what I'm looking for. It took me quite some time to figure out which APC models were which types, offline (standby) vs online, for some reason the APC.com product pages are vague on UPS types. I finally stumbed upon a white paper on their website named "Different Types of UPS Systems" which finally specified their product families to which UPS types.

JReam

ASKER

The APC people finally wrote back:
"Back UPS will not power on automatically after a long power outage, but the customer should power on this unit manually to power the connected load. "

Wow, the UPS won't RESTART after power is restored!! Why would anyone want to use/buy one of these UPSs? Even cheap PCs have the BIOS option to restart after power is restored.