> PowerTrust II-LR 2.0kVa(1.4kW) UPS 120V
>
> Anyone have a clue on the dual labeling of UPS power capacity?
>
> When dealing with AC is power (W) not equal to I x V but rather I X
> V(RMS)?

Actually power is the average of the product of the instantaneous voltage
and current.  If both those are sine waves, then

  WATTS = AMPS * VOLTS * cos(A)

where AMPS and VOLTS are RMS and A is the phase angle between them.  It's
this phase angle that accounts for the difference between KVA and Watts.
KVA can be more relevant to the UPS because it still has to handle the
voltage and current.  However, watts is more relevant to the load because
that's the power you actually get to use.  This kind of spec also makes it
clear that large power factors (large phase shift between voltage and
current) are not appreciated by the UPS.


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