Re: [Asterisk-Users] UPS rating for SOHO asterisk box
See http://www.windsun.com/Batteries/Battery_FAQ.htm Even deep cycle marine batteries can be crappy, with many actually being a combination of starting / deepcycle. The primary difference is the plates. Good deep cycles have thick lead plates. Industrial batteries should last longer. Car batteries typically have sponge style plates which offer high CCA but low life in deep cycle applications. UPS applications are very hard on batteries unless your power is REALLY bad, and goes out all the time. Lead-Acid batteries need to be used. On Tue, May 31, 2005 at 04:17:41PM -0400, Nick said: Use deep cycle marine batteries or similar. Car batteries arn't really designed for long low power, they're designed for CCA, high output short burst. Nick On Tue, May 31, 2005 at 01:22:09PM +0400, Jean-Michel Hiver wrote: Another thing to consider regarding the ups is the runtime, depending=20 on the hours and minutes you want the ups to supply power to your=20 asterisk box, you may need to add more batteries to the ups. Regarding this, I have done this hack yesterday: - Remove the battery from an existing UPS - Rewire the UPS onto biggest car lead acid battery (12v) you can find. Et voila! Bigger capacity. Put the batteries in parrallel and you do get=20 monstruous UPS capacity... the only trouble with it is that re-charging=20 the batteries may take some time. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
Daryl G. Jurbala wrote: -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jean-Michel Hiver Sent: Tuesday, May 31, 2005 5:22 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] UPS rating for SOHO asterisk box [...] Regarding this, I have done this hack yesterday: - Remove the battery from an existing UPS - Rewire the UPS onto biggest car lead acid battery (12v) you can find. Et voila! Bigger capacity. Put the batteries in parrallel and you do get monstruous UPS capacity... the only trouble with it is that re-charging the batteries may take some time. [...] Congratulationsyou've just given this part-time small town fire marshal and 14-year fire service veteran nightmares. Kidsdo NOT try this at home. The inverters in small UPSes are not designed to deal with runtimes that exceed the batteries in them. If you run this setup well past the time it was designed to run (by adding 3, 4, or more times that battery capacity it was ever designed to have) that chances of a catastrophic inverter failure (meaning flash, boom, fire) are very real and very likely. Ouch... In the test I have done, I replaced a HR 1224W F2F1 lead acid sealed battery by a fulmen heavy duty 95 amp/hours battery. The UPS flattened the battery out after 70 minutes instead of the original 15 minutes. However, charging *is* slow: it's been now 36 hours and it's still charging. Looks like I'll be better off buying a proper smart charger along with a decent inverter. I wouldn't want to fry the house :) -- Ykoz Un Max - La VoIP en pré-payé! Essayez gratuitement - 5 crédits offerts. --- http://ykoz.net/voip/max --- ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] UPS rating for SOHO asterisk box
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jean-Michel Hiver Sent: Wednesday, 1 June 2005 6:45 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] UPS rating for SOHO asterisk box Daryl G. Jurbala wrote: -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jean-Michel Hiver Sent: Tuesday, May 31, 2005 5:22 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] UPS rating for SOHO asterisk box [...] Regarding this, I have done this hack yesterday: - Remove the battery from an existing UPS - Rewire the UPS onto biggest car lead acid battery (12v) you can find. Et voila! Bigger capacity. Put the batteries in parrallel and you do get monstruous UPS capacity... the only trouble with it is that re-charging the batteries may take some time. [...] Congratulationsyou've just given this part-time small town fire marshal and 14-year fire service veteran nightmares. Kidsdo NOT try this at home. The inverters in small UPSes are not designed to deal with runtimes that exceed the batteries in them. If you run this setup well past the time it was designed to run (by adding 3, 4, or more times that battery capacity it was ever designed to have) that chances of a catastrophic inverter failure (meaning flash, boom, fire) are very real and very likely. Ouch... In the test I have done, I replaced a HR 1224W F2F1 lead acid sealed battery by a fulmen heavy duty 95 amp/hours battery. The UPS flattened the battery out after 70 minutes instead of the original 15 minutes. However, charging *is* slow: it's been now 36 hours and it's still charging. Looks like I'll be better off buying a proper smart charger along with a decent inverter. I wouldn't want to fry the house :) I have many sites that have a 35amp Charger with 2 x 400ah 900CCA deep cycle batteries (10 year warranty), and 1000VA inverters. The combination makes for perfect power and about 2.5 days run time with my network kit whish consists of several Dlink wifi access points, 1 xbox (hacked into a router/firewall) and a vsat system. Total cost for the power kit AUD$1400 all up, and not a single second of downtime in over a year. On the flipside, I have seen a ups flare when the transformer overheated and melted the varnish, nasty! Regards, T ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
I have many sites that have a 35amp Charger with 2 x 400ah 900CCA deep cycle batteries (10 year warranty), and 1000VA inverters. Those deep cycles batteries look quite appropriate... in which kind of store do you get them? The combination makes for perfect power and about 2.5 days run time with my network kit whish consists of several Dlink wifi access points, 1 xbox (hacked into a router/firewall) and a vsat system. Total cost for the power kit AUD$1400 all up, and not a single second of downtime in over a year. Looks pretty cool :) On the flipside, I have seen a ups flare when the transformer overheated and melted the varnish, nasty! Woops! Well, at the moment I have only 95 amp/hour and the power drain on the UPS is pretty low (about 130W). Still, it looks like I need to get a proper charger / inverter :-/ Cheers, Jean-Michel. -- Ykoz Un Max - La VoIP en pré-payé! Essayez gratuitement - 5 crédits offerts. --- http://ykoz.net/voip/max --- ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
I have many sites that have a 35amp Charger with 2 x 400ah 900CCA deep cycle batteries (10 year warranty), and 1000VA inverters. Those deep cycles batteries look quite appropriate... in which kind of store do you get them? In the US just about any store that sells batteries including Sears, InterState Batteries, most automotive parts stores, etc, etc. Just ask them. You see a lot of the deep cycle batteries used in fishing boats where they power electric trolling motors. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] UPS rating for SOHO asterisk box
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Terry H. Gilsenan Sent: Wednesday, June 01, 2005 5:05 AM To: 'Asterisk Users Mailing List - Non-Commercial Discussion' Subject: RE: [Asterisk-Users] UPS rating for SOHO asterisk box I have many sites that have a 35amp Charger with 2 x 400ah 900CCA deep cycle batteries (10 year warranty), and 1000VA inverters. The combination makes for perfect power and about 2.5 days run time with my network kit whish consists of several Dlink wifi access points, 1 xbox (hacked into a router/firewall) and a vsat system. Total cost for the power kit AUD$1400 all up, and not a single second of downtime in over a year. [...] Yepyou can (somewhat) build your own UPS with peoperly rated equipment. As a matter of fact, most telco installations don't have monolithic UPS's (like you'll see in most larger datacentersyou know..the big box that says Liebert on it), they use racks of batteries with separate charging circuits. Most of the equipment runs directly off of the battery voltage, but you will find places with some inverters as well. Of course, the room is properly designed (spaced, non-combustible racks, fire detection and supression systems, etc.) and, in most jurisdictions they also have to carry one or more operational permits (current Internation Fire Code requires permitting for stationar lead-acid battery systems exceeding 50 gallons liquid capacity). On the flipside, I have seen a ups flare when the transformer overheated and melted the varnish, nasty! I've seen completely unmodified (although not properly maintained) UPSes as large as 5000 Va completely melt down to the point where they destroyed their own chassis, damaged the rack they were sitting in, and activated the clean-agent supression system in the rooms they were in. This was actually a big problem with one of my customersthey hadn't been maintaining their UPSesthe replace battery lights had been lit for months (they had all been purchased at about the same time). Within a span of about 3 months, 4 of them melted down similarly. A quick call to APC revealed that the batteries in these units were rated for about 12 monts less than they had actually been in service, and a simple battery replacement would have prevented the problem (the chassis was rated for something like 3 sets of batteries...whatever the lifespan of the batteries was3 years I believe). So, don't do stupid things with high voltage, like modifying equipment that wasn't meant to be modified, using undersized equipment, failing to properly vent batteries, or storing your contraption on or near combustibles. It's just NOT worth the risk. Take it from someone who's pulled his share of bodies (of both the live and dead varities) out of buildings. I've seen way too many fires started by electrical system or device modifications similar to those described in previous posts. And most people who do things like this just never consider the life safety risk involved until its way too late. I'll get off my soap-box now and get back on topic. Daryl ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
Hi, Let me try to answer this one. Assuming your P3-800 is using a 300watt power supply, then in a full load condition, convert to VA, it will be 300/0.6=500VA. So, it is greater than your small 400VA box. So, you need a bigger ups. Of course, if your power usage is actually much lower than 300watt which in most cases it is, then your 400va box may be ok, but then you are taking a risk. Another thing to consider regarding the ups is the runtime, depending on the hours and minutes you want the ups to supply power to your asterisk box, you may need to add more batteries to the ups. cheers Wilson Pickett wrote: Slightly OT, but I think this is of possible interest to many of you, I need to get a UPS for my asterisk box. They are rated in VA but I can't quite figure out how that converts to real life. I have a PIII-800 box with two X100P and one TDM400P plus graphics adapter, an IDE hard drive etc. Will a small 400VA box be enough for this? tia ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
Another thing to consider regarding the ups is the runtime, depending on the hours and minutes you want the ups to supply power to your asterisk box, you may need to add more batteries to the ups. Regarding this, I have done this hack yesterday: - Remove the battery from an existing UPS - Rewire the UPS onto biggest car lead acid battery (12v) you can find. Et voila! Bigger capacity. Put the batteries in parrallel and you do get monstruous UPS capacity... the only trouble with it is that re-charging the batteries may take some time. -- Ykoz Un Max - La VoIP en pré-payé! Essayez gratuitement - 5 crédits offerts. --- http://ykoz.net/voip/max --- ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
Assuming your P3-800 is using a 300watt power supply, then in a full load condition, convert to VA, it will be 300/0.6=500VA. So, it is Thanks for that info. Where does the /0.6 come from? I've always wondered about VA which looks like VoltAmps. There are 400, 500 and 600VA models. The asterisk box is alone on the UPS so I guess a 500 should be the best investment. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
On Tue, 2005-05-31 at 13:22 +0400, Jean-Michel Hiver wrote: Another thing to consider regarding the ups is the runtime, depending on the hours and minutes you want the ups to supply power to your asterisk box, you may need to add more batteries to the ups. Regarding this, I have done this hack yesterday: - Remove the battery from an existing UPS - Rewire the UPS onto biggest car lead acid battery (12v) you can find. Et voila! Bigger capacity. Put the batteries in parrallel and you do get monstruous UPS capacity... the only trouble with it is that re-charging the batteries may take some time. And place the battery in a well ventilated environment :) You could give it a boost with a car charger. -- Dave Cotton [EMAIL PROTECTED] ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
Normally, the power factor is taken as 0.6, thus to convert watt to va, just divid the wattage by 0.6 to get the va rating. cheer Wilson Pickett wrote: Assuming your P3-800 is using a 300watt power supply, then in a full load condition, convert to VA, it will be 300/0.6=500VA. So, it is Thanks for that info. Where does the /0.6 come from? I've always wondered about VA which looks like VoltAmps. There are 400, 500 and 600VA models. The asterisk box is alone on the UPS so I guess a 500 should be the best investment. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
Another thing to consider regarding the ups is the runtime, depending on the hours and minutes you want the ups to supply power to your asterisk box, you may need to add more batteries to the ups. No worry there, since the modems (upstairs) will be unpowered as well. Although the asterisk box recovers pretty well from a short power cut, it is risky to allow these to happen at all. This is why I want the UPS, not for autonomy. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] UPS rating for SOHO asterisk box
I have a PIII-800 box with two X100P and one TDM400P plus graphics adapter, an IDE hard drive etc. Will a small 400VA box be enough for this? It's tricky sizing UPS'es to be bang on the money. The rule-of-thumb calculation for VA is watts/.6 . So, for a 200 watt power supply / .6 is 333 VA. Tricky part is, a 200 watt PSU is max power, which your PC will not draw all the time. You want to be bang on the money, so you have to determine the watts of every individual component like this: (numbers out of my ass) HDD 35W Mobo CPU 80W Video 10W NIC 5W TDM400 20W TOTAL 160W = 266 VA In my experience, oversizing your UPS gives you a comfortable margin, and these days, pricing between, say, a 400 to 600 VA is minor, and you get added runtime as a bonus. But if you want a decent runtime on your box, and it's of the 200W PSU variety, the 400VA will probably be OK given what you have stated. hth ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] UPS rating for SOHO asterisk box
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jean-Michel Hiver Sent: Tuesday, May 31, 2005 5:22 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] UPS rating for SOHO asterisk box [...] Regarding this, I have done this hack yesterday: - Remove the battery from an existing UPS - Rewire the UPS onto biggest car lead acid battery (12v) you can find. Et voila! Bigger capacity. Put the batteries in parrallel and you do get monstruous UPS capacity... the only trouble with it is that re-charging the batteries may take some time. [...] Congratulationsyou've just given this part-time small town fire marshal and 14-year fire service veteran nightmares. Kidsdo NOT try this at home. The inverters in small UPSes are not designed to deal with runtimes that exceed the batteries in them. If you run this setup well past the time it was designed to run (by adding 3, 4, or more times that battery capacity it was ever designed to have) that chances of a catastrophic inverter failure (meaning flash, boom, fire) are very real and very likely. Daryl ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] UPS rating for SOHO asterisk box
So it DOES work... I've always been wondering about that whenever I replaced batteries. Brilliant! From personal experience during a recent power-outtage, make SURE that your UPS isn't configured to shut down after x minutes. I have my * box on a 1000VA UPS that's also supplying my router, hub, a sipura and a cordless phone base. Power went out one day, but of course, one (cordless) phone remained available... For about 15 minutes -- then the UPS shut down, not because of low battery, but because it was configured to supply only for 15 minutes. Car batteries are cheap :) -Original Message- From: Jean-Michel Hiver [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 31, 2005 4:22 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] UPS rating for SOHO asterisk box - Remove the battery from an existing UPS - Rewire the UPS onto biggest car lead acid battery (12v) you can find. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
On Tuesday 31 May 2005 10:50, Daryl G. Jurbala wrote: Kidsdo NOT try this at home. The inverters in small UPSes are not designed to deal with runtimes that exceed the batteries in them. If you run this setup well past the time it was designed to run (by adding 3, 4, or more times that battery capacity it was ever designed to have) that chances of a catastrophic inverter failure (meaning flash, boom, fire) are very real and very likely. Not to mention that the charging circuitry on a lot of UPSes is *not* smart; you hook up a bunch of lead-acid car batteries and the UPS may try to charge them a lot faster than the circuitry is capable of handling... You can get around it with some other tricks but really -- what's your time worth, what's the venting for the car batteries gonna cost you, what's the additional circuitry gonna cost... really. Get a proper UPS for the job. And yes, I am an electrical engineer. Industrial power electronics, to be exact. :-) -A. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
get a kill-a-watt or lacrosse power monitor for $30 and leave it running for a few days. then you can sort throw the data and know what your power draw really is.. On 5/31/05, Andrew Kohlsmith [EMAIL PROTECTED] wrote: On Tuesday 31 May 2005 10:50, Daryl G. Jurbala wrote: Kidsdo NOT try this at home. The inverters in small UPSes are not designed to deal with runtimes that exceed the batteries in them. If you run this setup well past the time it was designed to run (by adding 3, 4, or more times that battery capacity it was ever designed to have) that chances of a catastrophic inverter failure (meaning flash, boom, fire) are very real and very likely. Not to mention that the charging circuitry on a lot of UPSes is *not* smart; you hook up a bunch of lead-acid car batteries and the UPS may try to charge them a lot faster than the circuitry is capable of handling... You can get around it with some other tricks but really -- what's your time worth, what's the venting for the car batteries gonna cost you, what's the additional circuitry gonna cost... really. Get a proper UPS for the job. And yes, I am an electrical engineer. Industrial power electronics, to be exact. :-) -A. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- sig Andrew Latham - AKA: LATHAMA (lay-th-ham-eh) WWW: http://lathama.com Email: [EMAIL PROTECTED] - [EMAIL PROTECTED] - [EMAIL PROTECTED] If any of the above are down we have bigger problems than my email! /sig ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
Use deep cycle marine batteries or similar. Car batteries arn't really designed for long low power, they're designed for CCA, high output short burst. Nick On Tue, May 31, 2005 at 01:22:09PM +0400, Jean-Michel Hiver wrote: Another thing to consider regarding the ups is the runtime, depending=20 on the hours and minutes you want the ups to supply power to your=20 asterisk box, you may need to add more batteries to the ups. Regarding this, I have done this hack yesterday: - Remove the battery from an existing UPS - Rewire the UPS onto biggest car lead acid battery (12v) you can find. Et voila! Bigger capacity. Put the batteries in parrallel and you do get=20 monstruous UPS capacity... the only trouble with it is that re-charging=20 the batteries may take some time. --=20 Ykoz Un Max - La VoIP en pr=E9-pay=E9! Essayez gratuitement - 5 cr=E9dits offerts. --- http://ykoz.net/voip/max --- ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] UPS rating for SOHO asterisk box
We actually did this, however we didn't use lead acide batteries, but GEL ones just like UPSes usually come with. This way their are no venting issues etc. It worked great, except don't put too much load on them. The circuits actually started to fry when thr power went out and we had 5 servers humming away on one :) Putting one or two on a UPS with a couple of car batteries it lasted forever. Usually the charge circuitries consist of sensing when the voltage stops changing, or cuts the charge off when the battery reaches a certain voltage. Either way if they are GEL cells, and the same voltage it could work :) The UPS wouldn't know the difference, unless it has some sort of a timer circuit which cuts the charge off after a certain amount of time, and you wouldn't really know unless you tried it. Preston Garrison direct: 877-748-4142 fax: 310-774-3901 cell: 623-748-4140 -Original Message- From: Andrew Latham [EMAIL PROTECTED] To: Asterisk Users Mailing List - Non-Commercial Discussion asterisk-users@lists.digium.com Sent: Tue, 31 May 2005 14:59:24 -0500 Subject: Re: [Asterisk-Users] UPS rating for SOHO asterisk box get a kill-a-watt or lacrosse power monitor for $30 and leave it running for a few days. then you can sort throw the data and know what your power draw really is.. On 5/31/05, Andrew Kohlsmith [EMAIL PROTECTED] wrote: On Tuesday 31 May 2005 10:50, Daryl G. Jurbala wrote: Kidsdo NOT try this at home. The inverters in small UPSes are not designed to deal with runtimes that exceed the batteries in them. If you run this setup well past the time it was designed to run (by adding 3, 4, or more times that battery capacity it was ever designed to have) that chances of a catastrophic inverter failure (meaning flash, boom, fire) are very real and very likely. Not to mention that the charging circuitry on a lot of UPSes is *not* smart; you hook up a bunch of lead-acid car batteries and the UPS may try to charge them a lot faster than the circuitry is capable of handling... You can get around it with some other tricks but really -- what's your time worth, what's the venting for the car batteries gonna cost you, what's the additional circuitry gonna cost... really. Get a proper UPS for the job. And yes, I am an electrical engineer. Industrial power electronics, to be exact. :-) -A. ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- sig Andrew Latham - AKA: LATHAMA (lay-th-ham-eh) WWW: http://lathama.com Email: [EMAIL PROTECTED] - [EMAIL PROTECTED] - [EMAIL PROTECTED] If any of the above are down we have bigger problems than my email! /sig ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] UPS rating for SOHO asterisk box
Living in the Caribbean, this is a big issue for us. I would avoid the little SOHO UPS units, they will not last very long. Always over rate your UPS and I would not play with external batteries, it is more trouble than it is worth. You can buy refurbushed 3U rack mount UPS on Ebay for little money, usually telco grade and about 1500 VA. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemcategory=44963item=5202751352 rd=1ssPageName=WDVW Chris Mason www.anguillaguide.com Tel: (305) 704-7249 Fax: (815)301-9759 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Wilson Pickett Sent: Tuesday, May 31, 2005 4:01 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [Asterisk-Users] UPS rating for SOHO asterisk box Slightly OT, but I think this is of possible interest to many of you, I need to get a UPS for my asterisk box. They are rated in VA but I can't quite figure out how that converts to real life. I have a PIII-800 box with two X100P and one TDM400P plus graphics adapter, an IDE hard drive etc. Will a small 400VA box be enough for this? tia ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] UPS rating for SOHO asterisk box
Hello, APC has a nice selector tool on their website. http://www.apc.com/tools/ups_selector/index.cfm It asks several questions to recommend an APC solution. it even gives you a percentage of the capacity of the ups systems capacity. Original Message From: Wilson Pickett [EMAIL PROTECTED] Date: Tue, May 31, 2005 3:00 am Slightly OT, but I think this is of possible interest to many of you, I need to get a UPS for my asterisk box. They are rated in VA but I can't quite figure out how that converts to real life. I have a PIII-800 box with two X100P and one TDM400P plus graphics adapter, an IDE hard drive etc. Will a small 400VA box be enough for this? tia ___ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
