Averaged out over any one year, your system should perform to within at least 90% of these daily kWh outputs per kW installed (based on Clean Energy Council Guidelines) :
|Alice Springs||5.0 kWh|
So - for example - in Sydney, a 5kW solar system should produce, on average per day over a year, 19.5kWh per day.
Expect a system to produce more in the summer and less in the winter. This article shows you how to determine how much your system should generate in any given month.