Battery Backup Guide

Brian asked:


I will have 2 devices running about 55 Watts a piece connected to a battery backup and i need them to last for anywhere between 2-5 hours. Any input would be appreciated!
BTW, looking for specs. forgot to put that.

maverick asked:


Hello every one !!
I need to run 2 ceiling fans+2 Tube Lights + one 22′ TV for at least three hours ( with out power )
There are lot of ambiguity’s in choosing 800 VA UPS or Inverter + 135 Ah Battery.
help me out in choosing the appropriate backup solution for my home, would be helpful if you can clearly differentiate with reasons.

Thanks a lot.

Ramesh HT asked:


I am planning to buy a laptop. I have opted for 9 batteries instead of default 6 batteries. Now, I would like to know whether a laptop needs a UPS? Can I directly plug it to AC mains? Will the backup batteries work as UPS in case of power failure? Will anyone help me please?

Ramesh H.T.
Bangalore-560 099

wwekanerulez asked:


I’m pretty sure I have model, Belkin F6C550-AVR UPS. I got it around Christmas time last year, so it’s not very old. Less than a year. The problem started early this morning. 4 AM I guess, around there. It’s been beeping for hours now. It’s one short beep every 30 seconds maybe. It does maybe 4 or 5, estimation. It stops for several minutes, I’d say around 10. It has a green light, it’s not red or yellow… so from what I know it’s not dead or anything. I HAVE to have a backup battery for my computer… long story. Some help would be appreciated. I’m gonna call the computer shop I got it at in a couple of hours to see what they can tell me. I think they’re open. Ha, anyways, I thought I’d give this a try. Also, I’ve unplugged it for 30 seconds and plugged it back in. Didn’t work. And I’ve held the power button and then cut it back on. No luck. So I’m stumped. I find it ridiculous that I might have to replace it when it’s not even a year old and it should last for 2 or 3 years. Thanks for any help you can give me.

Future asked:


Can I charge my Maruti 800 battery using a 750 VA UPS that I am currently using for my computer backup?

mdrali2001 asked:


hi
here a good friend of mine suggested an interesting thing about UPS.

he said that wee can take two wires from UPS and connect them with a big BATTERY and it will give us backup for more then 6 hour’s.

my question is can it be possible for 12.v UPS to charge a big BATTERY.
if yes then how much time it will take to charge it ?

any other suggestions from your side to use ups with big BATTERY in the place of inverter.

warm regards
Ali

StarryKnight asked:


My home UPS just keeps on charging the battery for days on end (with its exhaust fan whirring away), and the battery gives a backup time of about 12 mins (!) on 75% load.

So how should i check its potential? I know i have to do it in parallel, but should i first put the inverter in backup mode and then insert the multimeter’s probes into the battery’s terminals going into the inverter; or should i check when its charging (though i think the latter is wrong)??

And what will happen if i check the potential with the battery disconnected? Will the multimeter blow up with a lot of current being drawn, kinda like a short circuit?
“Unplug it, watch voltage drop. If it drops gradually over the 12minutes to about 10V”

Thanks for the quick answer, so is it safe to unplug and check with multimeter? And should i not measure the voltage when under load?
Its a 12v battery.
Some details, Its 2 years old, used to give 100mins on ~100% load. 500 watts inverter.
Damn i’m so dumb at times… of course its fine to check potential when disconnected when in voltmeter mode as its resistance is high, so little current will flow :).
Thanks for the updated details wingstwo, i’ll carry out the checks tomorrow being careful not to touch the hot lines…you can safely assume i would be more than extra careful after a narrow escape once with a very bad shock!

valerie m asked:


Ok I have a ES 550 APC Battery backup + surge protector. I have my computer plugged into it, printer, and mini air conditioner. All of a sudden my printer( which is connected to a portable outlet and then that is connected to my battery backup) stopped working and wont come on. The battery just keeps beeping but my computer is working ok that is connected to the battery? Did I overload it? also my friend connect her heater into a breaker and now her battery is beeping? What can she do to fix this?

ganoderma asked:


the UPS of my computer (about 3 year old) stopped giving any back up.so i sent it to ups supplier for repair. they said that they have provided a new battery .but the ups is not giving any back up what may be the cause?where to check fault and get the back up?

Suriya S asked:


i have 10 KVA Numeric UPS. Currently 20 SMF batteries has been connected. But is giving only 20 mins of backup time.
People say that backup time will get reduced very quickly in SMF batteries and advised to go for Tubular batteries.
Is it true? Which type of battery give more backup time atleast for next 3 to 4 years? is it SMF or UMF or Tubular?

Any help appreciated..

regards
Suriya