HomeRoast Digest


Topic: Emergency! Power (4 msgs / 96 lines)
1) From: Aaron
You can not use a computer ups for your coffee pot.
Ok let's put it this way.
IF you have a smaller element coffee pot it might suck about 750 to 775 
watts.   A 1500 VA ups, which runs about $200 should handle this BUT 
only for about 5 minutes.  If you get the extended run one with an 
external battery pack, add about another 15 to 20 minutes max to the run 
time and another good 100 dollars to the price.  It might run a bit more 
as the C rate of discharge on the battery has been reduced a bit.
If you are like most other people and your pot runs in the 1000 to 
1200/1500 watt range then forget the computer ups.  you will overload 
the 1500 VA and it will shut down on you in about 30 seconds if it lets 
you abuse it that long.   You can get a 3000 VA ups, but now we are 
talking several hundred dollars possibly a grand or more depending on 
the model bells and whistles.  At this rate, you might as well get the 
generator that will handle 5Kw for about 600 dollars, and run basically 
the entire house including a few space heaters if need be.   For the 
1000 price range you can get a propane generator as well, runs quieter, 
cleaner exhause and propane is much less a pain in the ass as gas,  it's 
safer to store, doesn't go bad and need stabilizers like gas does in 
storage etc etc...
Buy a few sterno cans and use them as emergency heat to boil water for 
your coffee if you need,  in the long run it's the cheapest way to go 
probably in your situation.
Aaron
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2) From: Paul Helbert
You might get a deal on a 16 or 32 KVA propane powered generator from a
hospital. My understanding, when we purchased one twenty years ago, was that
they are required to change them out for new ones every so often. They have
generally been well maintained.
-- 
Paul Helbert
So it is written.
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3) From: Coffee
Our power guy explained it once (I'm not going to pretend to remember  
the details) but he said that you should not plug things like heaters  
into a UPS. Most small computer UPSs are "on" all the time. The power  
from the utility is powering the UPS and the UPS is powering the  
computer. This filters and conditions the power at the same time and  
there isn't any "switching" when the power goes out, it just continues  
powering. Plugging something in with the characteristics of a heater  
will fry the battery and/or the inverter in the UPS. I got this  
explanation after a couple of people in the office plugged small space  
heaters into the UPSs under their desk and fried them. It's not that  
they overloaded them, but it is something about the characteristics of  
the heater that did the damage.
-Peter
On Apr 1, 2008, at 3:54 PM, Aaron wrote:
<Snip>
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4) From: Steven Van Dyke
At 05:54 PM 4/1/2008, you wrote:
<Snip>
Aaron,
There are also units made for temporary emergency power for your 
house.  We've got one we picked up for about $40 at SAMs Club a while 
back.  It'll run a coffee pot just fine, or a TV, etc..  It has a 
small light on the front, an FM & Weather radio, and a crank-type 
flashlight clipped to the side.  Provides a little 120 and/or 12VDC.
One of the uses for it is for construction types to use it to listen 
to the radio and run the chargers for their tools on a job site - 
plus maybe a coffee pot.
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