The most common solar power systems in Australia cost around $5650 including the rebate from the government. The smallest solar panel system of 1.5kW would cost somewhere around $3,109 while a solar panel system of 6kW would cost about $6,810.
The size of a solar panel system depends on your energy demands and how big your house is. The cost of panels, therefore, depends on a number of factors like the size and capacity of the system, installation year (that determines the rebate), and location in Australia. The quality of parts used in a solar power system like the inverter, batteries and solar panels also help determine the cost and the rebates
| 6kW | 8kW | 10kW | 11kW | 12kW | 12kW | |
| New South Wales | $5590 | $7499 | $8756 | $9125 | $9,950 | $11,166 |
The price that you pay for a solar power system is inclusive of the installation costs for most companies. If a price of $5,899 is being advertised for a 6.6 kWh solar panel system, it includes installation costs after the rebate. It is important that the installation is done by a certified installer.
The future is renewables owing to the increasing scarcity of fossils. It will most likely take you 4 years for the solar power system to cover its own cost. The payback duration largely depends on your usage and your consumption of electricity. Considering the amount of money you spend on your electricity bills, this period is not too long.
The table below will help you estimate your average savings if you switch to solar energy:
| System size | Number of panels | Average yearly savings | Lifetime savings |
| 5KW | 20 | $2,264 | $45,190 |
| 6KW | 24 | $2,481 | $49,072 |
| 7KW | 28 | $2,665 | $55,912 |
| 8KW | 32 | $2,852 | $59,920 |
Here’s how you can estimate your budgets on the basis of the size of your house, keeping a few reference points in mind.
| Suites home size | System size | No. of panels | No. of people | Average yearly saving |
| Small | 5KW | 20 | 5 – 6 | $2,264 |
| Large | 6KW | 24 | 6 – 7 | $2,481 |
| X-Large | 7KW | 28 | 7 – 9 | $2,665 |
| XX-Large | 8KW | 32 | 9 – 12 | $2,852 |
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