This table shows an estimated power output for different sizes

Solar System power size
   

Expected Generation

1.5 kw                                          5-6 kw a day


2 kw                                            7-8 kw a day


3 kw                                            11-12 kw a day


4 kw                                            15-16 kw a day


5 kw                                            18-20 kw a day

 
Average Sydney home uses 18-20 kw a day