This is how it seems to work…. The Main Line CTs read a value (X). The
single circuit CT readings are added up (CT1+CT2+CT3… etc)=(Y). Then
the EMP takes X and Y and finds the delta (difference + or -) and shows
that on the Balance line.
Had the same problem with about 50-60 Watts Balance showing. This only
seemed to happen when one or both of my shop heaters turned on.
I went into manage circuits and dropped my 2 heater voltages to read
1.98 instead of 2.00. This solved my problem.
lasersbee