Enter a few details to see your estimated annual savings, payback period, and 25-year return. Takes 30 seconds.
Calculations assume standard roof orientation (north-facing), 20% self-consumption of generated power, current average retail electricity and feed-in tariff rates for your state, and a performance ratio of 0.82. Actual results will vary.
These are indicative estimates only. Your actual savings depend on usage patterns, roof orientation, shading, retailer rates, and system performance. Get a personalised quote from a CEC-accredited installer for accurate figures.
Our calculator uses real data for each state to give you the most accurate indicative estimate possible. Here's what we factor in:
Each state has different average daily peak sun hours ranging from 3.8 (Tasmania) to 5.5 (Northern Territory).
We use the average retail electricity rate for your state (ranging from 25c to 42c/kWh) to calculate bill savings.
Excess solar exported to the grid earns a feed-in tariff. We use the typical state rate (5c–10c/kWh).
System costs shown are after the federal STC rebate has been applied — your installer deducts this upfront.
A free quote from a local CEC-accredited installer will give you precise numbers based on your actual roof, usage, and location.
Get My Free Personalised Quote →