Yes, especially if it would have multiple power taps. We are working on some stuff that would might need 12, 24 and 48 volts DC.
John >-----Original Message----- >From: Russ Kreigh [mailto:[EMAIL PROTECTED] >Sent: Sunday, March 4, 2007 10:18 AM >To: ''WISPA General List'' >Subject: RE: [WISPA] External battery on UPS > > >Yeah, it's completely possible, and will work.... well, at least once, until >the batteries are gone and need to be recharged. > >The issue is the duty-cycle of the charger, your going from a 14ah to 100ah >charge load, the charger has to run 7-times as long to fully charge the >batteries, this may work fine with some higher end UPS, and some it might >burn up the charger. > >Another thing to make note of, is that most UPS systems run an internal 24V >system, and not a 12V system, so be SURE which one you're dealing with >before you start any modifications. > >We're in process of developing our own remote-site power solution. >Everything we've found is either too big physically, requiring expensive >outdoor enclosures, or doesn't have the run-time we desire, or is too >expensive. > >I think we've got the basic design down, we're adding things like a local >power input option, so that in a long extended outage we can drop the >generator off to charge the batteries and run the system, and when the >utility power is restored, it will switch back automatically. > >We're also looking into a direct 12v input from a vehicle cigarette lighter >output, or additional external batteries. > >Would anyone have any interest in this when we get it complete? > >Thanks, > >Russ Kreigh >Network Engineer >OnlyInternet.Net >Supernova Technologies > > > >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >Behalf Of paul hendry >Sent: Sunday, March 04, 2007 12:09 PM >To: [EMAIL PROTECTED]; [email protected] >Subject: RE: [WISPA] External battery on UPS > >Scott, > >Surely it should be possible to replace 2 12v 7ah batteries run in >parallel (not series) with 1 12v 100ah battery as the voltage isn't >changing? With regards runtime I can just increase the external battery >count. > >Mac, don't worry I have no intention of putting my tongue on these >things to see if they charged ;) > >Cheers, > >P. > >-----Original Message----- >From: Scott Reed [mailto:[EMAIL PROTECTED] >Sent: 02 March 2007 12:22 >To: WISPA General List >Subject: Re: [WISPA] External battery on UPS > >The charger is designed for the size and number of batteries in the >original configuration. Changing the quantity and/or type of battery >risks damaging either the charger or the batteries. > >Also, runtime is determined by the batteries, so changing them changes >the runtime. > >paul hendry wrote: >> 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" <[email protected]> >> 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: [email protected] >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >>> >> >> >> > >-- >Scott Reed >Owner >NewWays >Wireless Networking >Network Design, Installation and Administration >www.nwwnet.net > >-- >WISPA Wireless List: [email protected] > >Subscribe/Unsubscribe: >http://lists.wispa.org/mailman/listinfo/wireless > >Archives: http://lists.wispa.org/pipermail/wireless/ > > >-- >WISPA Wireless List: [email protected] > >Subscribe/Unsubscribe: >http://lists.wispa.org/mailman/listinfo/wireless > >Archives: http://lists.wispa.org/pipermail/wireless/ > > >-- >WISPA Wireless List: [email protected] > >Subscribe/Unsubscribe: >http://lists.wispa.org/mailman/listinfo/wireless > >Archives: http://lists.wispa.org/pipermail/wireless/ > -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
