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 Posted: Thu, 29 Jun 2006 16:40:59 Post Subject: |
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Belkins own website indicates 120minutes at 50-100%
All I can say is someone screwed the pooch on that spec sheet.
If you go to the APC site(a much more reliable brand IMHO)and look at the
APC runtime chart
scroll down to the 1500 you see at 100% (930w on the APC)you'll get around 10-11 minutes with fresh, fully charged batteries, about 24 at 1/2 load.
I've recommended and installed dozens-hundred+ of UPS's and find the APC chart fairly accurate when new, on a 24 hour charge.
If you notice, the 1/2 load is alittle more then 2x the fullload go down to 1/3 and you get 5 times the runtime.
That's the problem with gelcells is you can only withdraw energy at a slower rate as compared to a wetcell, but they are stable and don't spill.
so for best runtime go WAY over capacity (like a 3000VA,often available used, for $150, but need new batteries soon) You can mod a UPS to use external wetcells (like marine deepcycle batteries) relising that your little UPS will take several/many days to recharge them after an extended event,if it doesn't burn up in the process.
Or you could get a generator to keep the ups charged during the power outage (DON"T use a generator directly to power the computer without a high quality UPS in between, the spikes/um-pure sine wave of a small generator will cook your computer in minutes)
Or you can use the UPS as it was intended to bridge short outages/brownouts and safely shutdown the computer within a few minutes if the power doesn't quickly return to normal. |
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