The inverter will be tested under dynamic load conditions. The load will be provided by an electronic load bank which can switch in and out a series of linear resistive, inductive and capacitive loads in small (< 50 VA) increments. The maximum load will be 2 kVA. The power factors will vary between 0.7 and 1, leading and lagging. The load change profile will be similar to that seen in a residential setting, although only using linear loads. Entrants can expect the load to vary between 0 and 2 kVA with individual load.
The inverter must demonstrate an efficiency of > 95 %. The efficiency is defined as and will be determined by measuring the input voltage and current and output voltage and current, using the real component of the power at the fundamental frequency. Efficiency measurements will be taken using a variation on the California Energy Commission (CEC) efficiency determination method. The inverter efficiency will be determined by taking measurements at 6 different load levels