• Subject: Re: Battery back-up
  • From: John Hall <jhall@xxxxxxxxxxx>
  • Date: Thu, 27 Jan 2000 13:24:58 -0500

We used to keep our 9404 F10 plugged into our APS smartups 2000 XL -
never had a problem.  The UPS guys will probably tell you about phase
inversion and inductive resistance and power factor etc etc etc.
If the old UPS is supplying clean power I don't think you will have a
problem.  UPS inputs are not very different than computer power supply
inputs.  One thing that may not work correctly is the battery percentage
remaining indicators.  Not that they always worked that well anyway.  If
you do "double up" the UPS's I recommend that you do a power fail test
to see how long the other unit will actually keep supplying power.  When
the first unit fails the the 9910-140 pack should cut in.  

If you want "uptime" you need an expandable UPS.  You just add battery
packs until you get enough run time.  Note that time to recharge is
extended also.

John Hall
Home Sales Co.

Mike McClain wrote:
> We have a 170-2292 attached to a 9910-140 battery pack which is plugged
> into the wall. This battery pack will provide only about 15-20 minutes
> of uptime if the power fails. Additionally, I have  a 5.3kva Best
> battery pack that used to power our long gone F35. I'm being told (by
> Best) that I should not plug the 9910-140 into this unit. I'm interested
> in hearing what  (if anything) others are doing to provide maybe 2 or 3
> hours worth of uptime during a power outage.
> tia
> Mike M.
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