UPS backup power supply

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bob

If you have a UPS backup power supply, can you unplug it and use the
power from it a day later? Or, do you have to use the power
immediately after it's unplugged?

Thanks.
 
If you have a UPS backup power supply, can you
unplug it and use the power from it a day later?
Yes.

Or, do you have to use the power
immediately after it's unplugged?
Click to expand...

Nope. Its got batterys inside it.
 
If you have a UPS backup power supply, can you unplug it and use the
power from it a day later? Or, do you have to use the power
immediately after it's unplugged?

Thanks.
Click to expand...

Depends on the UPS.

Once mine is switched off, switching it on again when no AC is present
on the input, gives no power on the outlets. And if I leave mine
switched on but with no loads on the output, it continues to beep.
If your UPS doesn't have annoying features like that, then
technically a battery powered inverter (which is what your UPS
contains) should be able to provide power at a future time, for
as long as the battery manages to hold a charge.

If you want a simple battery powered inverter, you can get
them at the hardware store. They are sold for use in cars,
but usually have a pretty low wattage rating. To make
a couple hundred watts AC, would draw 12V @ 20A, which is
a pretty heavy load for a lighter socket. A car battery won't
last forever with a load like that.

This is the most powerful one Radio Shack sells. The lower
wattage ones are cheaper. With a $120 deep cycle 12V battery
rated at 100 amp hours, you could draw 200W from this thing
for about four hours. The battery in your UPS probably does
not have as large an amp hour rating.

"300-Watt DC to Dual-Outlet AC Power Inverter"
http://www.radioshack.com/product/index.jsp?productId=2103532

Paul
 
I noticed that some of these have USB connectivity. Why would you want
to connect to it by USB?
 
I noticed that some of these have USB connectivity. Why would you want
to connect to it by USB?
Click to expand...

It's to allow the software it came with to monitor UPS health and
charge. It will still work just fine without the USB connector.
 
I noticed that some of these have USB connectivity.
Why would you want to connect to it by USB?
Click to expand...

The monitoring and status functions.

Better than the old approach of doing that by a serial port.
 
I noticed that some of these have USB connectivity. Why would you want
to connect to it by USB?
Click to expand...

or like the lady that phoned the helpdesk supposed:
"I did not know the computer had to be connected to the mains. I
thought it would get its power from the internet...like the
advertisement said !"
 
(e-mail address removed) wrote:
Click to expand...
Depends on the UPS.
Click to expand...
Once mine is switched off, switching it on again when no AC is present
on the input, gives no power on the outlets. [remainder snipped]
Click to expand...

Some UPS boxes will act like that, but if goosed in the right place
will come to life even if the mains are dead. Typically such boxes
have separate buttons for "ON" and "OFF" (i.e., not a toggle switch),
and the goosing consists of holding the ON button until the first
beep is heard, then releasing it. Consult the user's guide for
details if you have a copy or can find it online...or just try it
next time your load is turned off.

Joe Morris
 
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