Discover how much you can save with solar power.

We’ve created an easy to read comparison chart to help you decide which solar system size is right for your home.

Simply select the most relevant electricity costs/bill amount below and use the chart to find out the best solar system size suited to your home and budget and understand the estimated electricity bill savings and payback period you can expect. 
 

Electricity costs/bill

Solar system size

Avg cost of solar system

No. of panels

Power units produced/day 

Estimated savings/bill

Avg payback yrs

$120 1.5kW $2,490 – $3,200 6 6.60 $105 Within 5
$150 2kW $3,400 – $4,100 8 8.80 $90 - $145 Within 4
$220 3kW $3,490 – $5,600 12 13.2 $120 - $200 3
$300 4kW $4,900 – $6,900 16 17.6 $140 - $270 3 - 4
$350 5kW $4,990 – $8,000 20 22 $180 - $350 2.5 - 4
$450 6kW $5,800 – $9000 24 26.4 $200 – $400 2.5 - 4
$500 7kW $7,300 – $10,900 21-28 31 $300 – $450 2.5 - 4
$500 8kW $7,500 – $11,200 21-28 31 $300 – $505 2.5 - 3.5
$700 9kW $9,600 – $13,600 28-36 40 $300 – $600 3 - 5
$800 10kW $9,900 – $14,300 31-40 44 $400 – $700 3 - 5


Please note this table is an indicative guide only. A number of additional factors need to be considered such as your roof size, time of the day you use majority of your electricity and how your future electricity use may change.