UPS system info for HP76 [RE-wrenches]

[Jack D West]

Jerry,

Another, perhaps simpler solution is to tap the battery at 12 (or 24) VDC and use an off the
shelf inverter to power the computer and associated equipment.  A DC auto transformer can
then be used to equalize the battery.  These are available from Solar Converters and can be
custom ordered for almost any battery voltage.  The off the shelf units retail for about US
$140.

Solar Converters   www.sentex.net/~sci
                            519 824-5272

Jack West
Talkeetna AE
907 733-2035

Bob Ellison wrote:

> Joy,
> I e-mailed Jerry to see what his loads were as a e-mail to you directly got
> returned as unknown, below is the note and the response that I received; my
> thoughts are below .
>
> From:   "Bob Ellison" <ellison at gisco.net>
> To:     <lilyerd at ncis.com>
> Sent:   Wednesday, February 23, 2000 7:49 PM
> Subject:        Very Small Computer UPS
>
> >
> > Jerry,
> > Can you give me an idea of what your total loads on the backup systems
> are?
> > I gather that you are feeding the computer with inverter power. What is
> your
> > battery voltage? Distance from the battery bank?
> >
> > Thanks
> > Bob Ellison
>
> Hi Bob
> The load would be about 300 watts or so, the printers could get shut off and
> not get crazy
> My battery voltage is nominal 144v dc and the other systems I would want to
> help out vary from 12 to 60 volts nominal
> My distance is Approx 100 feet
> I think I know what you have in mind, but it's hard to find a very small
> efficient 144v inverter to just keep hooked up for my computer
> We'll be in touch, thanks   Jerry
>
> Bob's response:
>
> I believe Exeltech (or another manufacturer) can custom build an inverter in
> that voltage range, to supply just the computer equipment. That way the only
> load on that inverter is the computer and you do not have problems when a
> heavy load hits the main inverter, or your transfer switch lets generator
> power through the system. You always have conditioned power from the
> inverter and no problem with sudden changes in power quality caused by
> outside forces, (water pump, washing machine, toaster, or whatever).
> I am not sure what "other systems I would want to help out vary from 12 to
> 60 volts nominal" means! How many different voltages is he running?
>
> That's my best quick response. It should isolate the computer and solve his
> problem.
>
> Thanks,
> Bob Ellison
>
> RE. Ellison
> Alternative Energy Systems & Supplies
> 34642 Countryman Road
> Theresa, New York. USA.
>                            13691-2076
> 315-628-0601 Voice
> 315-628-5797 Fax
>
> >
> >
> >
> >
>
> -----Original Message-----
> From:   Joy Anderson [mailto:joy.anderson at homepower.com]
> Sent:   Wednesday, February 23, 2000 7:59 PM
> To:     RE-wrenches at topica.com
> Subject:        UPS system info for HP76 [RE-wrenches]
>
> Hello Wrenches,
>
> We're putting together HP76 and we'd like to print this letter and a
> response. Anyone out there have any ideas for this guy?
>
> Thanks,
>
> joy
> ***
>
> _____
> Very Small Computer UPS
> Hi there, I was wondering if you could help me find a UPS system that
> would accept quasisinewave input. I do a lot of switching around on
> my system and I would like to have a steady supply of power. If you
> know of one that would work I would like to buy it from whoever you
> would suggest and then probably buy a few more for some people that I
> know that have the same problem. We have tried about three standard
> ones and even the one that you could adjust the voltage down 12 volts
> from 120, but they would not recognize the inverter input. Thanks for
> your help, and look forward to some business. I figured that you guys
> would know if anyone would. Jerry Lilyerd * lilyerd at ncis.com
> _____

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