However the DX crowd over many years have used their own set --
which includes kilowatt. May be "wrong phonetics", but a fact of life for
a
long time.
Unofficial but common DX phonetics are at URL:
http://ac6v.com/dxphonetics.htm
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The reason that kilowatt is particularly bad is that the listener can't be
sure whether it is "kilowatt" or "kilo watt"

For example:

What is the callsign when the speaker says "kilowatt eight kilowatt sugar"?
It could be K8KS or KW8KWS or K8KWS or KW8KS. In other words, there are 3
wrong possibilities and 1 right one. Thus the listener has only a 25%
chance of getting it right. Phonetics should be chosen with the goal of
clarity not confusion.

Now among friends or once the QSO has been established and the call signs
clearly understood, there's no harm in using different or cutesy phonetics.

Dee D. Flint, N8UZE