I think I was over $1,200 for a two slot 48v system. The guy that does the Interstate batteries quoted me on it.
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com ----- Original Message ----- From: "Ken Hohhof" <af...@kwisp.com> To: af@afmug.com Sent: Tuesday, January 6, 2015 2:00:47 PM Subject: Re: [AFMUG] 24V UPS Who priced it for you? A couple years back I did a spreadsheet. Complete –48VDC systems including web/SNMP controller, rectifier modules, LVD, remote battery temperature probe, and circuit breakers but not including batteries came out to: 2 slot 250W: $540 2 slot 500W: $714 4 slot 750W: $913 4 slot 1000W: $1087 (rectifier modules are 250W each, loadsharing) If you don’t need all the features it might look expensive, but if you do, I’m not sure the price is out of line. This is a very miniaturized system for outside temperature DIN rail enclosures, their larger rackmount systems in addition to higher capacity may also be more cost effective. Note also this is a passive cooling system, does not rely on fans. From: Adam Moffett Sent: Tuesday, January 06, 2015 1:38 PM To: af@afmug.com Subject: Re: [AFMUG] 24V UPS Micropack made me cry when I saw what it cost. Have you looked at Eltek and Emerson? Although Eltek seems to be oriented around –24 or –48, and not so good for +24. Not familiar with Emerson, Mark Radabaugh has posted they use them. I have an Eltek Micropack –48V system and the web and SNMP capability is excellent. I did have one rectifier module fail, but it was pretty painless given they are N+1 redundant. From: Gino Villarini Sent: Tuesday, January 06, 2015 1:15 PM To: mailto:af@afmug.com Subject: Re: [AFMUG] 24V UPS The problem with xl units it's the charger ... It has low amperage (5-8 amps dep model) and don't maintain well big banks The idea is to have the xl with internal batt and have a big bank connected to the external batt connector This bank will be isolated from the apc during AC operation. The bank will have a good charger and will run 24 dc loads(still under consideration) AC fails, the apc ups will see the big bank for extended runtimes Gino A. Villarini @gvillarini On Jan 6, 2015, at 2:51 PM, Josh Baird < joshba...@gmail.com > wrote: <blockquote> Hmm, give us details when you get them regarding the XL! Josh On Tue, Jan 6, 2015 at 1:45 PM, Gino Villarini < g...@aeronetpr.com > wrote: <blockquote> Chris Thanks for this compressive evaluation. We bought 2 Alpha/Cordex unit for testing. We are in a similar spot, looking for a web managed power system in 24 and 48 vdc. You saved us the expense of buying an ICT unit. That being said, we are looking into using a slightly modified apc xl unit to run 24 dc direct from the UPS DC rail Gino A. Villarini @gvillarini > On Jan 6, 2015, at 12:24 PM, Christopher Tyler < ch...@totalhighspeed.net > > wrote: > > I'm at my end. I've been looking at this for a while now and it's obvious > that no one makes an industrial APC UPS that works. > > We've tried the Alpha Cordex (DIN rail) and the ICT (19" rack) and neither > one can do what a APC management card can. We just need it to provide 24vDC > to a load and when the AC power goes out, send an alert and let us monitor > the system status via SNMP. > > Alpha: > PROS: DIN rail mounted > CONS: Web interface is IE only, SNMP requests are completely broken, have not > tested SNMP traps, cost is about $700. > > ICT: > PROS: It works well as a dumb power supply/charger with UPS functionality, > web interface works in all browsers. > CONS: SNMP is limited to about 6 values, all remote communication is lost > when AC is removed, no battery monitoring at all other than the voltage for > use with LV cutoff which is one of the values that is not available via SNMP. > Also costs about $700 > > I have to give it to Alpha at this point, at least their unit remains > "intelligent" when AC power is removed. If they would fix their web interface > and SNMP it would be perfect. > > So... Does anyone have a solution that works that isn't completely cobbled > together? I need to know when we lose/regain AC power, that the battery is > draining, what the battery voltage is so that I know when it's about to cut > off, it needs a LV cut off to protect the batteries, and all this information > needs to be available via SNMP and web. Am I asking for too much or does > something of this nature exist outside of TrippLite and APC? > > -- > Christopher Tyler > MTCRE/MTCNA/MTCTCE/MTCWE > Total Highspeed Internet Services > 417.851.1107 > </blockquote> </blockquote>
