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- 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/
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- 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/
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- 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- 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
RE: [WISPA] DC Inverter help
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- 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- 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
Re: [WISPA] DC Inverter help
Good news...thanks for the info! -Original Message- From: Gino A. Villarini [EMAIL PROTECTED] Date: Mon, 10 Jul 2006 14:12:10 To:'WISPA General List' wireless@wispa.org Subject: RE: [WISPA] DC Inverter help 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- 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- 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
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- 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- 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
Re: [WISPA] DC Inverter help
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- 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- 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
Re: [WISPA] DC Inverter help
Joe, 1. Right, every time you convert from one type of power to another you're only going to get 80 to 90% typ. Some devices claim up to 98% eff, but that's only over a very specific operating range. Most inverters are terribly inefficient for small loads. Some use 20 or 50 watts just idling! So coming right off the batteries will give you the longest runtime in general. 2. A good charger stops when it's supposed to. A cheap-o charger from wal-mart could cook the batteries. You need a good charger that has several charging stages to take good care of the batteries. The solar electric people like Outback and Xantrax make excellent ones, but they're expensive. There are inexpensive units that do a good job too. Just make sure that they back off the output when the batteries are charged. Look for something called a float charge. Sometimes chargers that have a trickle charge as the last charging stage will cook a battery over time. There are dc-to-dc converters (check mouser.com and digi-key.com) that can take a wide range of input voltages and deliver a consistent output voltage. These allow you to really discharge a battery and keep your equipment running at a constant voltage. For instance, a dc-dc converter could take 12 volts from a battery and deliver 48 v. Even as the battery discharges to 9v or less, you could get 48 v. This however is REALLY hard on the batteries, which are considered to be completely discharged in the 10V range. How it will behave will depend on the charger and the load. Most good chargers have 3 or 4 charging stages and choose the correct stage depending on how deeply discharged the batteries are. It goes something like equalize-bulk charge-maintenance charge. I have a feeling that with a small load like an AP, the charger would oscillate from charge to maintenance charge over time as the batteries are slightly discharged, then recharged, slightly discharged, recharged... Or the maintenance charge might be enough that the batteries see no discharging at all. It'll depend on the charger. Here's one of my favorite links about batteries: http://www.uuhome.de/william.darden/carfaq.htm I've been studying up on it for quite a while now because I'm building an off-the-grid home. Jason Joe Laura wrote: 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- 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
Re: [WISPA] DC Inverter help
This is what I do. And, 36VDC works well and costs less. Jason wrote: 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- 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- 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
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/
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/
RE: [WISPA] DC Inverter help
How about something like this:- http://cgi.ebay.com/48-VDC-82-Watt-Rectifier-Battery-UPS-48VDC-1-5-Amps_W0QQ itemZ9729838061QQihZ008QQcategoryZ11175QQssPageNameZWD1VQQrdZ1QQcmdZViewItem Faisal -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mac Dearman 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/
RE: [WISPA] DC Inverter help
That would work, but there are a couple problems with that particular one: 1. 3½ high by 17 wide by 12 deep (its too big) 2. Its $245.00 ;-) Mac -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Faisal Imtiaz Sent: Sunday, July 09, 2006 10:01 PM To: 'WISPA General List' Subject: RE: [WISPA] DC Inverter help How about something like this:- http://cgi.ebay.com/48-VDC-82-Watt-Rectifier-Battery-UPS-48VDC-1-5-Amps_W0QQ itemZ9729838061QQihZ008QQcategoryZ11175QQssPageNameZWD1VQQrdZ1QQcmdZViewItem Faisal -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mac Dearman 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/
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/
RE: [WISPA] DC Inverter help
Do a quick search on ebay for carrier access and you should be able to find it for less. As to the too big part, -:) Did you try looking at the tripplite line of products ? http://www.poweruptech.com/tl_inv.html Faisal Imtiaz -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mac Dearman Sent: Sunday, July 09, 2006 11:09 PM To: 'WISPA General List' Subject: RE: [WISPA] DC Inverter help That would work, but there are a couple problems with that particular one: 1. 3½ high by 17 wide by 12 deep (its too big) 2. Its $245.00 ;-) Mac -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Faisal Imtiaz Sent: Sunday, July 09, 2006 10:01 PM To: 'WISPA General List' Subject: RE: [WISPA] DC Inverter help How about something like this:- http://cgi.ebay.com/48-VDC-82-Watt-Rectifier-Battery-UPS-48VDC-1-5-Amps_W0QQ itemZ9729838061QQihZ008QQcategoryZ11175QQssPageNameZWD1VQQrdZ1QQcmdZViewItem Faisal -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mac Dearman 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/
RE: [WISPA] DC Inverter help
Mac, Understood, volts is volts and need respect :-). Might think about doing it with some sort of switches or fuses on the external lines to allow you to change batteries safely and without having to take all of them off line at any one time. With fuses at the right rating they would pop if there were a short like you mention and maybe avoid problems, although that is just one more thing for a service call too. Brian -Original Message- From: Mac Dearman [mailto:[EMAIL PROTECTED] Sent: Sunday, July 09, 2006 11:15 PM To: [EMAIL PROTECTED]; 'WISPA General List' 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/
Re: [WISPA] DC Inverter help
Mac, have you looked at these? http://www.apcc.com/products/family/index.cfm?id=203 John Message- From: Mac Dearman [mailto:[EMAIL PROTECTED] Sent: Sunday, July 9, 2006 07:34 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/
