TIG Welders

OK, I know this isn't quit the correct forum for this question
but I've seen similar topics bandied about here before so
I'll go ahead & ask.

At some point in my future I'm going to buy a welder. My
main concern is Aluminum welding so AC is a must.
From the list, it seems the welder to have is the Lincoln
Squarewave 175. Seems reasonable.

The problem I'm having is the spec'ed input and out put
ratings. The manual says the service feed must be 65A
breakered at 125A on a 230V line.

This seems like allot for a 150A welder. The output of
14.8V at the rated 150A is about 2.2KW. The input
requirements of 230V @ 65A is almost 15KW.

That means almost 13KW dissipation in the welder.
Now, I'll admit I've probably got VA, Watts, RMS and
the like all screwed up, but 13 KILOWATTS?

The manual ALSO says this thing can be run on
8AWG Cu wire and a 50A plug.

Come on!!! Somebody help me out here.
What am I doing wrong...

Has somebody actually got one of these things and
if so what service are they using, what's it breakered
at and is working with out setting anything on fire?

-G