Is anyone using external batteries on the larger APC UPS's? I've got an old Smart-UPS 3000 RM that has 8 x 12v batteries in it. The thing is they are wired in a bit of a strange config. It looks to me like they are split into 4 sets of 2 batteries running in series then 2 of those sets are cabled to the same connector inside the UPS and so there are 2 connectors with 4 batteries hanging of each.
Is there any reason I can't run 2 x 2 (in series) 12v 100ah batteries instead of the original 8? I don't seem to be able to and don't really want to get another 4 batteries just to discover I can do it with 4. Cheers, P. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Nash - Lists Sent: 16 November 2006 16:45 To: WISPA General List Subject: Re: [WISPA] External battery on UPS I replaced the two internal batteries last night with two external, $100 batteries, and put a load on the UPS that matched the highest load I have out in the field (80w). It took 2 Tranzeo APs, an Xpeed SDSL modem, and a 19" TV on the QVC to load it up properly. Now instead of 1 hour I get 13 hours. Bigger, better batteries should net me more time than this. My goal is bang for buck at this stage in my business...more run time for a sensible price. One cool thing about this setup is that I can rig it up to be able to simply take new batteries out to a site when they are getting low, instead of the generator. I can keep some spare batteries charged up and ready to go. It's a whole lot cheaper and easier than purchasing multiple QUALITY 1000w generators and putting large custom tanks on them. That is if your UPS is not on the top of a water tower or something. ;) 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: "Brian Rohrbacher" <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Wednesday, November 15, 2006 6:41 PM Subject: Re: [WISPA] External battery on UPS > I'm pasting Gino's link to the right thread. > Then I can search me email in a year and find the correct thread.... > > Connectors: > > http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=263-110 > > Batteries: > > http://www.donrowe.com/batteries/8a31dt.html > > > > Brian Rohrbacher wrote: > > > Can we get some links to these batteries that work well? > > Gino, > > Got a link to the DC block connectors you were talking about? > > > > Brian > > > > > > Travis Johnson wrote: > > > >> Hi, > >> > >> We run two 4 gauge power wires out the front of the case, connect the > >> positive to a 60A fuse, and then to the batteries. > >> > >> We are using AGM type (same thing used in UPS systems) big batteries > >> (a little bigger than a car battery, but each battery is 110 pounds). > >> We wire them in series (to get 24VDC). > >> > >> This setup has only been installed for 12-18 months at various > >> locations, so I don't have an estimate on battery life. > >> > >> Travis > >> Microserv > >> > >> Brian Rohrbacher wrote: > >> > >>> You got any pics of this or similar Travis....anyone? > >>> > >>> Travis, > >>> What APC do you use and what batteries are added? What do you draw > >>> and what is th run time? Do you know how many times the one with > >>> the most cycles has been drawn down? How long do the batteries last? > >>> > >>> Brian > >>> > >>> Travis Johnson wrote: > >>> > >>>> 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 > >>>>> > >>>>> > -- > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.409 / Virus Database: 268.14.6/535 - Release Date: 15/11/2006 -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
