If you look in the <filename>.mtd file you will see the meter details which contains what you are looking for. It is documented at:
http://bigladdersoftware.com/epx/docs...
And click on the link for "eplusout.mtd"
(The link directly to that portion did not seem to work when I tried it).
It is described as:
The meter details file consists of two
parts:
For report variables that are on meters, it shows all the meters that
the report variable is on. In the
following example, “Meters for” , is
shown and then the meters that
accumulate the value of that variable
as a “meter”.
For each meter, the report variables that make up that meter are
shown. In the following example, “For
Meter=” , “contents are:” and then
each variable that occurs on that
“meter” are shown.
I think what you want is in the second half. Unfortunately, the list of output variables that are contained in Electricity:Facility is usually very long, often dozens or hundreds of variables.
To include them in the ESO file, each one would need an Output:Variable object.