My thanks to all the suggestions re. the UPS unit(s) that we have had 
difficulty with. My husband got serious and did some internet searching re. APC 
UPS 
units and found some info about the Battery Back-UPS ES being problematic when 
dealing with line fluctuation. We phoned APC today (sent them info by e-mail 
and they actually sent back a phone # that actually reached a real tech support 
department. Very impressive.) It turns out that they are replacing the unit I 
bought 3 weeks ago as being defective. They are replacing the unit we bought 
a couple of years ago (still under warranty) as being defective. & They are 
replacing the battery in a 3rd unit, also under warranty. I'll keep you posted 
re. whether, or not, the replacements work any better than the current units.

Mical Wilmoth Carton
[EMAIL PROTECTED]

> The more sophisticated units often have self-test circuitry even if
> the unit is setup to be monitored by a connected computer; this may
> relate to the 2-4 AM thing. The other issue might be a failing
> battery. They do wear out. I have 2 TrippLite 1000VA units that have a
> real time read-out for the line voltage. They were about $100 the last
> time I saw one at Costco.
> 




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