[Asterisk-Users] UPS for Asterisk

[Peter Svensson]

On Tue, 25 Jan 2005, David Brodbeck wrote:

> > From: Peter Svensson [mailto:psvasterisk at psv.nu]
> > The SmartUPS ups's from APC that are >= 1kVA seem to be of a 
> > lot better 
> > quality then their smaller siblings. We have lost none of the 1kVA or 
> > larger ups:es while several of the smaller ones have died of 
> > electronics 
> > failures. The larger ups's seem to have 5-year batteries 
> > while the smaller 
> > ones have 3-year batteries.
> 
> Just a counterexample -- the batteries in our 3 kW rack-mount SmartUPS only
> lasted three years before one of them failed.  They were a real pain to get
> out, too -- the failed battery had swelled up and wedged itself in the
> battery compartment.  The rack-mount UPS runs around 120 degrees F inside
> and that seems to shorten the battery life.

The rackmount models indeed run way too hot and they do have a shorter 
lifespan. Some of the non-rackmount models have fans as well. I was 
thinking more of the electronics quality than the batteries. The small APC 
units are not as well made as the larger ones.

According to our supplier for large ups:es a raise from 25 degrees C to 35 
degrees C halves the battery lifespan for the regular batteries.

Peter