Below is a list showing average solar power system prices in Australia for the month of May 2019, these figures have been provided courtesy of SolarChoice.net.au. One notable stand out since the last time I republished these numbers some time back in mid-2018 is the big reduction in price for the larger systems in the 8 to 10 kW range in some cases the price has come down by $2,000. Below the table, I have included a quick snapshot of what's turning up in Google search for a 6kW system in some capital cities.
| State | 1.5kW | 2kW | 3kW | 4kW | 5kW | 7kW | 10kW |
|---|---|---|---|---|---|---|---|
| Adelaide, SA | $2,690 | $2,880 | $3,370 | $3,940 | $4,470 | $6,470 | $9,250 |
| Brisbane, QLD | $3,230 | $3,540 | $3,940 | $4,670 | $5,090 | $6,830 | $9,420 |
| Canberra, ACT | $2,610 | $2,830 | $3,470 | $4,110 | $4,700 | $6,630 | $9,140 |
| Darwin, NT | $4,860 | $5,600 | $6,950 | $7,930 | $9,510 | $10,990 | $14,100 |
| Hobart, TAS | $2,940 | $3,300 | $4,040 | $5,070 | $5,500 | $8,060 | $13,570 |
| Melbourne, VIC | $3,070 | $3,380 | $3,800 | $4,290 | $4,820 | $7,520 | $11,070 |
| Sydney, NSW | $3,020 | $3,180 | $3,640 | $4,080 | $4,440 | $6,950 | $9,490 |
| Perth, WA | $2,400 | $2,650 | $2,870 | $3,360 | $3,420 | $5,400 | $10,100 |
| Average | $3,103 | $3,420 | $4,010 | $4,680 | $5,240 | $7,360 | $10,770 |