We adjust the number of "external batteries" in the APC configuration
settings. Usually we set it to 2x the number of actual batteries we have
installed and it seems pretty accurate.
Travis
Microserv
Brian Rohrbacher wrote:
What is used to tell you how much runtime is left? Have you found it
accurate?
Brian
Travis Johnson wrote:
We tried the $65 deep cycle marine batteries from Walmart. They
worked OK, but the best batteries we have found so far are the gel
deep cycle that are used in very large UPS systems. They weigh 110
pounds each and are rated at 120 amp/hour and they do that for sure.
We actually have a site out of power right now that has been running
on two of those batteries for 14+ hours so far and still shows
another 8 hours remaining. This is with three wireless radios, an HP
24 port switch and a power rebooter all running off it. :)
Travis
Microserv
Mark Nash - Lists wrote:
Ah-hah! I'll give this a try. Unfortunately the batteries I want
to use are $200 each. ;) Got a recommendation on batteries that
will last with constantly being charged by the UPS?
Mark Nash
Network Engineer
UnwiredOnline.Net
350 Holly Street
Junction City, OR 97448
http://www.uwol.net
541-998-5555
541-998-5599 fax
----- Original Message ----- From: "Travis Johnson" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Wednesday, November 15, 2006 6:13 AM
Subject: Re: [WISPA] External battery on UPS
You can't use just 1 battery. The APC units want to see 24vdc, so
you need two batteries running in series.
It works perfectly, as I have 20+ remote locations running off two
gel type batteries. Make sure you install some type of a fuse on
the positive side of the connection.
Travis
Microserv
Mark Nash - Lists wrote:
I believe I remember some discussion on this list on connecting an
external battery to an APC UPS. I'm in the middle of doing it
right now and am having problems. The UPS just beep continuously
with the 'bad battery' light on. I'm using a Lifeline deep cycle
battery. Any ideas?
Mark Nash
Network Engineer
UnwiredOnline.Net
350 Holly Street
Junction City, OR 97448
http://www.uwol.net
541-998-5555
541-998-5599 fax
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