Best Battery Backup for Your Rigs? - page 2.

TheShoura

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Testing

Quote from: keybaud on May 15, 2011, 01:05:25 PM

Don't forget to make sure that your internet connection has backup power as well, and you may want to check that your internet provider has it at your local exchange, otherwise you can put as much backup power as you can into your rig, but if you can't connect to the net it's a waste of money.

yup

I totally spent about a grand getting UPS and BBU's up and when the power went out, my internet went down anyway even tho the modem was still on. Local terminal was not on a UPS/BBU

So check that first.

bulanula

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Quote from: keybaud on May 15, 2011, 01:05:25 PM

Don't forget to make sure that your internet connection has backup power as well, and you may want to check that your internet provider has it at your local exchange, otherwise you can put as much backup power as you can into your rig, but if you can't connect to the net it's a waste of money.

Finally somebody with a bit of logic !

keybaud

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Don't forget to make sure that your internet connection has backup power as well, and you may want to check that your internet provider has it at your local exchange, otherwise you can put as much backup power as you can into your rig, but if you can't connect to the net it's a waste of money.

AmpEater

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If you want to expand your rigs you want 240v off the bat, otherwise you need to spread the power over multiple circuits, each circuit would need its own cheap UPS, and power supplies work less efficiently at 120v vs. 240v (on my corsair 750w gold run at full load its 87.5% on 120, lower since you're probably dropping through an extension cord, surge strip...and 91% at 220 right off the panel)

But I look at electronics as a long term investment, cheap electronics as a short term thing. Are you planning on running your rigs in cases with filtered air and dedicated power, or sitting on a shelf in a living room plugged into the wall? If the latter a cheap UPS will work just fine, just make sure to get enough wattage for your full load needs.

Current-C

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Quote from: AmpEater on May 15, 2011, 10:31:43 AM

Quote from: Current-C on May 15, 2011, 10:09:38 AM

I'm really just looking for something that will let them keep power for a few minutes or so if the power flashes off (happens maybe once every couple of months, a little more here in the spring). Maybe it's not worth it if it will reduce efficiency.

Quote

The biggest problem with a UPS is efficiency, if that is something you are concerned with. Let's say you have PSU's that are 90% efficient, and your UPS is also 90% efficient, this reduces your overall power efficiency to 81%

The effeciency thing doesn't have to be true. He's thinking of UPSs that constantly power the load from an inverter. Most switch over to inverter power in a fraction of a sec to take the load and don't suffer an efficiency loss during normal operation. Look for "switchover time" on the specs

I'd buy this http://cgi.ebay.com/1800W-Pure-Sine-Wave-Tower-Long-Run-UPS-48V-220V-240V-/170551041937?pt=LH_DefaultDomain_0&hash=item27b5a25f91

And pair it with a bank of 4 small gel-cell batteries. U-1 would work well. Size dependent on run time. You are planning on using 240v, right?

I trust your input but do I really need all that to handle the occasional brief outage? Power usually isn't off for more than a minute or two. Will this setup require 240v? If that's the case I may need an upgrade (or spread my rigs to multiple circuits?).

Thanks!

AmpEater

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Quote from: Current-C on May 15, 2011, 10:09:38 AM

I'm really just looking for something that will let them keep power for a few minutes or so if the power flashes off (happens maybe once every couple of months, a little more here in the spring). Maybe it's not worth it if it will reduce efficiency.

Quote

The biggest problem with a UPS is efficiency, if that is something you are concerned with. Let's say you have PSU's that are 90% efficient, and your UPS is also 90% efficient, this reduces your overall power efficiency to 81%

The effeciency thing doesn't have to be true. He's thinking of UPSs that constantly power the load from an inverter. Most switch over to inverter power in a fraction of a sec to take the load and don't suffer an efficiency loss during normal operation. Look for "switchover time" on the specs

I'd buy this http://cgi.ebay.com/1800W-Pure-Sine-Wave-Tower-Long-Run-UPS-48V-220V-240V-/170551041937?pt=LH_DefaultDomain_0&hash=item27b5a25f91

And pair it with a bank of 4 small gel-cell batteries. U-1 would work well. Size dependent on run time. You are planning on using 240v, right?

Current-C

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I'm really just looking for something that will let them keep power for a few minutes or so if the power flashes off (happens maybe once every couple of months, a little more here in the spring). Maybe it's not worth it if it will reduce efficiency.

Quote

The biggest problem with a UPS is efficiency, if that is something you are concerned with. Let's say you have PSU's that are 90% efficient, and your UPS is also 90% efficient, this reduces your overall power efficiency to 81%

1bitc0inplz

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I guess it depends on how long you want to run while the power is off. If you're just interested in smoothing out < 1 minute hiccups in the power and otherwise using it as a means of giving your machine a chance to properly shutdown, then I'd image a sub $100 APC would work just fine.

AmpEater

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What do you want, enough power to ride out a brownout, or to keep rigs running for a few hours with no power? Either way I think you're going to need something beefier than either listed. Really, you want something with separate batteries and then a good size 48v deep cycle pack.

Current-C

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I'm looking at this one: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=41041&Sku=O65-9900

and this one: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5774231&Sku=A75-9270

but I honestly don't know where to start. Is this too much? Not enough? Need something I can grow into and run 4-5 rigs with 3-4 5850s each. Thanks!

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