In the field "Night Tare Loss Power" in EnergyPlus you can fill in the energy that the inverter is using during standby. ElectricLoadCenter:Inverter:LookUpTable was designed for use with data contained in the Inverter Performance Test Summaries available at http://www.gosolarcalifornia.org/equipment/inverter_tests/summaries/ABB%20MICRO-0.25-I-OUTD-US-208.pdf. The Night Tare Loss Power in this document is 0.02 W. But in the InputOutputReference I see in the example that there is 200 W filled in for the Night Tare Loss.
Is it true that they assume that the inverter is standby 100 hours a year? So that makes the Night Tare Loss Power = 0.02 W x 100 hour = 200 W