On Fri, 8 Jul 2016 11:23:39 -0400, you wrote: >David wrote: > >> This is the only deal I see at the moment but I do >> not know how suitable it would be and it is more >> than I paid although about twice as powerful: >> >> http://www.upsforless.com/apcsurta1500xlref.aspx > >I have a fleet of its bigger brothers, the 2000XL and 2200XL, and >recommend them highly. The conversion engines are rated for continuous >duty, so you can add as many extra battery packs as you like to extend >the run time (most UPSs designed for home use -- even very expensive >ones -- do not have enough cooling to run continuously, so they depend >on the battery going dead to keep them from burning down).
Online or double conversion UPSes all have to be rated for continuous duty. I have an old Powerware 9120 which I bought new, two refurbished Powerware Prestige EXTs, and two refurbished Leibert GTX2-700s. The Prestige EXTs are interesting because they can operate as line conditioners without the batteries. These all support external batteries so I wonder if that is a ubiquitous feature with online UPSes. >That price is not bad, IMO, if they come with fresh, GOOD QUALITY >batteries. I strongly advise NOT using the generic black Chinese >batteries -- IME, they are worthless crap. If you live somewhere you can >get genuine Panasonic SLA batteries, use those [but BEWARE of fakes!!]. >Here in the US, the PowerSonic SLAs are the best I've found. I get mine >from "ecomelectronics" on ebay [no affiliation, just a satisfied customer]. I am actually on the hunt for replacement batteries now so thanks for the tip; I will check them out. >I have had no RF interference issues, or any other problems other than >bad, generic black Chinese batteries. The APC supplies are rugged and >well-protected -- one battery pack I hadn't rebuilt (full of the generic >black batteries) failed in a spectacular fashion (sparks and smoke and >melted plastic *from the batteries*). The UPS itself suffered no damage. The local HAM club has been looking for sine wave UPSes and inverters which produce minimal RFI without much luck. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
