Enter your bill and location for a personalised estimate of annual savings, payback period, and what you'd pocket over 25 years.
Check your last 2–3 bills and use the average.
Work from home = higher. Out all day = lower (20–30%). Average household ~40%.
6.6 kW is the most common residential size in Australia.
Estimates based on current electricity tariffs, feed-in rates, and solar irradiance data for your state. Actual savings depend on your usage patterns, tariff plan, shading, and panel orientation. Use this as a guide — get quotes from accredited installers for precise figures.
Get Real Quotes From Local InstallersWe use state-specific electricity rates, solar irradiance (peak sun hours), standard 0.5% annual degradation, and the 2026 STC rebate schedule. Feed-in tariff is estimated at the current state average. All figures in today's dollars.
This tool gives you a solid ballpark. For a figure specific to your roof, shading, tariff plan, and usage profile, a CEC-accredited installer will provide a detailed proposal — obligation free.