On Tuesday 31 May 2005 10:50, Daryl G. Jurbala wrote: > Kids....do 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