If you don't think so then just look at the current direction indicator on your power quality meter.?????
Voltage and current signs?
If you mean polarity, only voltage has polarity. Current doesn't so you lost me.....
A residential power meter makes use of the fact that the current does indeed have a polarity. It reverses the polarity on one of the wires so that the current fluxes will be additive an uses it along with the L-L voltage to get the energy reading (it uses 1/2 windings on the current coils so you don't get twice the kWh).
I'm afraid it is not as simple as that.Also, a load always uses up energy, if it were supplying energy it would not be a load, it would be a source.