We have a Dell poweredge 2900 server (2008 build) and based on the specs it has a 930W power supply.
That presumably is how much the psu CAN deliver- it doesn't tell me what power is actually drawn from the AC supply.
I tried APC's handy selection calculator on their web site - entering 1000w for power and 15 minutes for runtime.
It points me to a smart ups 1500 RT at about $1,544 but the advert does not tell me the actual runtime- it says 'extended runtime model'.
Yet I see costco adverts for APC backups pro 1500 models at $200 and they seem to indicate you can expect only 3 to 4 minutes runtime!
So is the APC site's recommendation for my requested 15 minutes runtime flawed, or is there really a huge difference between the smartups 1500 and the 1500 pro runtime?
I don't know much about these except the person before me bought a Smart-Ups 1000 (the big heavy one)with the poweredge 2900 in 2008 and it has been not-good recently; despite replacing batteries a couple of years ago it recently died after only a few minutes when the power was out for a while.
Now the box stared beeping and the LEDs flashing so I assume it means the batteries are useless now.
I do have one of those lower cost APC Backups pro units ( a 1300 unit) on another computer and it did last longer than the big SmartUps 1000 although the load is likely lower than the Poweredge!!