48v dc power - test-drb@ccmp.vtda.org

10 Oct 2000

Only a few UPS's use 12 volts.  Many use 36  or 48 volts.  Then you get into
the 3KVA units that have 96 volt bank of batteries.  The real nice 10+KVA
boxes have 180 to 300V battery banks.  Some day I will get a new battery
bank for my 10 KVA box for the office.  In the meantime I make do with a few
1 to 3 KVA boxes.

Also some of the 12v UPS's will not start from just battery.  They have to
"fail over to battery"  I do have a 1KVA Triplite that is 12V and does start
...
 from just battery.  So keep your eyes open for those.

Dan
-----Original Message-----
From: Chuck McManis &lt;cmcmanis(a)mcmanis.com&gt;
To: classiccmp(a)classiccmp.org &lt;classiccmp(a)classiccmp.org&gt;
Date: Tuesday, October 10, 2000 8:52 PM
Subject: Re: 48v dc power

...
 Why not buy a "dead" UPS that can over the
wattage of your system and
install a 12V in plug on the back. Most of these use a 12V DC input and
provide acceptable power on the output. Its cheaper than simply buying a
12V -> 120V inverter @600Watts or so.

--Chuck

"Shawn T. Rutledge" wrote:
>
> On Sat, Sep 16, 2000 at 05:25:23AM -0800, Mike Ford wrote:
> > I have some 48-57 vdc input, otherwise PC normal output power supplies
for
...
 > > about $5 each. Ask now if anybody wants some,
basically I "think" new units
...
 >
> What I could really use is a couple of 12V input supplies.  I want to
> put a PC in the car and also run a couple of servers from a battery/
> solar panel system.  I know they are available new for $120ish if memory
> serves but they shouldn't have to cost so much.
>
> --
>   _______                   Shawn T. Rutledge / KB7PWD ecloud(a)bigfoot.com
...
 >  (_  | |_)          http://www.bigfoot.com/~ecloud
kb7pwd(a)kb7pwd.ampr.org
...
 >  __) | |
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