Just bought a 1000va ups and charged for 24hrs then tested without mains power - system is mini itx d2700 atom with 4gb ram, 1 120mm fan, 1 sata hdd and a 300w psu. It lasted just over 5 mins on battery and i was hoping for a lot more than that, does that sound right or do i consider rma?
5 mins backup time on a 1000va ups?
- Thread starter currob
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Hi resident, no it doesn't have a software option, it is a Trust 1000va ups and it is supposed to bleep slowly when on battery but with plenty of juice and then fast when getting low on juice, it just bleeps slowly for 5 mins then cuts out with no faster beeping or warning 
Hi resident, no it doesn't have a software option, it is a Trust 1000va ups and it is supposed to bleep slowly when on battery but with plenty of juice and then fast when getting low on juice, it just bleeps slowly for 5 mins then cuts out with no faster beeping or warning
You got the model number ? All the Trust 1000va UPS I've found on Google have USB connectivity.
Edit: This one? - http://www.trust.com/products/product.aspx?artnr=15600
If so, that claims upto 45 mins on backup.
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Soldato
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You need to take the size of the batteries into account when looking at runtimes. None of the Trust UPSs are physically big enough to contain high capacity batteries.
The VA rating just tells you what the maximum supported load is. Higher VA units tend to have bigger batteries, but they don’t have to.
The Trust pages don’t include any proper specifications, and no guidance about expected runtime against load. I wouldn’t touch one with a bargepole.
The VA rating just tells you what the maximum supported load is. Higher VA units tend to have bigger batteries, but they don’t have to.
The Trust pages don’t include any proper specifications, and no guidance about expected runtime against load. I wouldn’t touch one with a bargepole.
If it's not APC it's not worth buying in my experience. As bremen has said VA is only a measure of the energy that the device can supply per second, it doesn't mean that it has a large energy capacity. The fact that your UPS weighs a fraction of that of an equivalent APC UPS clearly shows how small the battery is. The lack of USB connection for software interface and only 2 power sockets is also quite telling of it's quality.
Did you have any other devices plugged into the UPS?
Large, badly calibrated LCD monitors can use significant amounts of power.
Did you have any other devices plugged into the UPS?
Large, badly calibrated LCD monitors can use significant amounts of power.
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Associate
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the manual http://www.trust.com/products/productmanuals.aspx?ProductCategory=POWER&ProductGroup=UPS&artnr=15600 says it has a 9 Ah battery in it.
5 mins seems a little short but it's only going to be 10 - 15 max.
5 mins seems a little short but it's only going to be 10 - 15 max.
A 108Wh battery in a ups rated for 400W is a bit ridiculous. A real 1100VA UPS is in the region of £200. You would honestly get better performance from a £70 APC 700VA.
http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BE400-UK&total_watts=100
http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BE400-UK&total_watts=100
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Soldato
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It's quite impressive that they've managed to market a 480W UPS as 1000VA. They’re playing with the figures to make it look better than it is. A 1000VA APC UPS is rated up around 700W.
The 8 hour recharge time isn’t very impressive either.
I’d guess that they aren’t very expensive.
The 8 hour recharge time isn’t very impressive either.
I’d guess that they aren’t very expensive.
It's £80...
Soldato
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That'd explain it. I'd expect nearer to £300+Vat for a decent 1000VA UPS.
APC sell their standard 900VA and 1200VA ones for £140 and £240 respectively, and sine wave 1000VA ones for £310.
Still with a 108Wh battery it should be lasting much longer than 5mins as it can't possibly be using more than 100W. My 700VA APC has the same capacity battery and it lasts over 15mins with my high spec pc + monitor, I even have the set top box connected to it as well. It would have to have atrocious discharge characteristics.
Their specifications are ludicrous though, 34 ~ 60min backup time @ 480W clearly breaks the laws of thermodynamics.
Still with a 108Wh battery it should be lasting much longer than 5mins as it can't possibly be using more than 100W. My 700VA APC has the same capacity battery and it lasts over 15mins with my high spec pc + monitor, I even have the set top box connected to it as well. It would have to have atrocious discharge characteristics.
Their specifications are ludicrous though, 34 ~ 60min backup time @ 480W clearly breaks the laws of thermodynamics.
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Thanks for the replies, i wish i had asked here first before buying, the unit is a lot smaller than i expected so i appreciate the battery can't be all that big really. The model is PW-4100T. I do have a 20" lcd plugged in too so will take that off the loop. Case of lesson learned the hard way i think. Will save up for an APC then and prob just use this one for the broadband router alone and the APC for the system.
Noticed a 'minimum load' in the manual of 81 watts and checked the load at the wall and it was 62 watts max so I plugged in a couple of other items to get a load of ~110 watts and just tried again now without mains power and it has ran the system for 26 mins before screaming at me to resume mains power, so i'm a little happier with that now 
Still gonna save for the apc though.
Still gonna save for the apc though.