In article ,
"Set Square" writes:
Ah, now that's interesting! The little plug in volt/amp/watt meter which I
have bought also displays phase angle as cos-phi (can't do Greek symbols in
plain text!). What use should I make of this information when determining
genny load?

Generators (and UPS's) normally care about the VA of the load.
So for practical purposes, simply measure the current drawn by
the appliances and ignore the phase angle and power.

--
Andrew Gabriel