As I understand it in order to be efficient you need to run right off the batterys. Right? Would the battery charger stop charging precisly when needed? Superior Wireless New Orleans,La. www.superior1.com ----- Original Message ----- From: "Jason" <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Monday, July 10, 2006 1:41 PM Subject: Re: [WISPA] DC Inverter help
> Gang, > > I'm not a UPS expert, but if the batteries were deeply discharged, > wouldn't the extra load of the external batteries would make it hard on > the ups when it tries to bring them back up? > > Maybe I misunderstood the question; but, if I needed 48VDC > uninterrupted, I'd string 4 deep cycle batteries together and connect a > good multi-stage battery charger. Then I'd run my 48 V devices right > from the batteries. If you don't need 120AC, then there's no need for a > UPS. If the UPS is already there and uses a 48V stack, then I'd tap > into that... > > Jason > > Gino A. Villarini wrote: > > yes > > > > Gino A. Villarini > > [EMAIL PROTECTED] > > Aeronet Wireless Broadband Corp. > > tel 787.273.4143 fax 787.273.4145 > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > > Behalf Of Mark Nash > > Sent: Monday, July 10, 2006 1:14 PM > > To: WISPA General List > > Subject: Re: [WISPA] DC Inverter help > > > > Gino, are you saying > > > > a) that you've got external, non-APC batteries plugged into your UPS and > > b) that your UPS/SNMP card recognizes the charge level? > > > > 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: "Gino A. Villarini" <[EMAIL PROTECTED]> > > To: "'WISPA General List'" <wireless@wispa.org> > > Sent: Monday, July 10, 2006 9:02 AM > > Subject: RE: [WISPA] DC Inverter help > > > > > > > >> We do it > >> > >> Gino A. Villarini > >> [EMAIL PROTECTED] > >> Aeronet Wireless Broadband Corp. > >> tel 787.273.4143 fax 787.273.4145 > >> > >> -----Original Message----- > >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > >> Behalf Of Mark Nash > >> Sent: Monday, July 10, 2006 11:14 AM > >> To: WISPA General List > >> Subject: Re: [WISPA] DC Inverter help > >> > >> I'm curious if anyone has a) connected external batteries to an APC UPS... > >> AND ... used the APC SNMP card to monitor the status of battery > >> consumption. > >> > >> I currently use APC SU700NET UPSs in external 6"-deep boxes to condition > >> power and provide battery backup. The SNMP card (AP9617) will e-mail our > >> support if the site goes on battery power, giving us about 2.5 hours to > >> get > >> up the hill with a generator. When the batteries go below a threshold of > >> charge left, it e-mails to let us know it's in a critically low charge > >> state. > >> > >> So, if we put on extra batteries, does the UPS know this and does it know > >> what kind of runtime it has left? > >> > >> 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: "Mac Dearman" <[EMAIL PROTECTED]> > >> To: <[EMAIL PROTECTED]>; "'WISPA General List'" > >> <wireless@wispa.org> > >> Sent: Sunday, July 09, 2006 8:15 PM > >> Subject: RE: [WISPA] DC Inverter help > >> > >> > >> > >>> Brian, > >>> > >>> I guess I am an idiot because I hadn't thought of that! I don't have any > >>> (hardly) of my APC UPS's overloaded and it would probably be pretty easy > >>> to > >>> do that. I bought some rack mount Compaq 3000Watt UPS's for the NOC and > >>> tied > >>> 4 Gel Cell 100lb batteries to each of those Compaq's. That has been > >>> working > >>> like a charm, but it scares the fire out of me to mess around them. While > >>> connecting them I managed to arc the wires and that produced a ball of > >>> fire > >>> that was bigger than I was! I later found out those 4 12VDC batteries in > >>> a > >>> series (48VDC) produces more than enough DC voltage to knock your guts > >>> out > >>> while it blows the bottom of your feet off. > >>> > >>> Sorry for that story - but it may keep some of us from "leaving here > >>> early" > >>> > >>> Mac > >>> > >>> > >>> > >>> -----Original Message----- > >>> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > >>> Behalf Of Brian Webster > >>> Sent: Sunday, July 09, 2006 10:00 PM > >>> To: WISPA General List > >>> Subject: RE: [WISPA] DC Inverter help > >>> > >>> Mac, > >>> Can you tap in to the battery lines on the UPS and add extra > >>> external > >>> batteries to extend the run time? This would give you the advantage of > >>> conditioned power and automatic switch over of the UPS, and you would > >>> still > >>> have any other management features of the UPS still available to you. > >>> Just > >>> an idea to consider. > >>> > >>> > >>> > >>> Thank You, > >>> Brian Webster > >>> > >>> -----Original Message----- > >>> From: Mac Dearman [mailto:[EMAIL PROTECTED] > >>> Sent: Sunday, July 09, 2006 10:35 PM > >>> To: 'WISPA General List' > >>> Subject: RE: [WISPA] DC Inverter help > >>> > >>> > >>> > >>> Can anyone give me a lead as to what I am looking for? I believe this > >>> http://tinyurl.com/lje7s is what I need, but I don't think I need > >>> 400Watts > >>> as all I will be pulling at several new tower sites are a few RB532's > >>> with > >>> their radios. I think I ought to keep the RB532s powered at 48VDC as they > >>> will be in excess of 200' up a tower. My intentions are to put a couple > >>> Marine batteries in an enclosure for back up power and have the DC > >>> inverter > >>> to keep them charged and have a seamless transfer if a power outage comes > >>> along. I have been putting these big honking APC UPSs in all my > >>> enclosures, > >>> but am trying to get something that will last longer in times of outages > >>> > >>> Any help would surely be a appreciated. > >>> > >>> Thanks folks, > >>> Mac > >>> > >>> > >>> -- > >>> 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/ > >>> > >>> -- > >>> 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/ > >> > >> -- > >> 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/ > -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
