Free calculator · Australia · no signup
Solar panel payback calculator
Estimate annual electricity value and simple payback for a rooftop solar system.
Enter your details
Your estimate
Estimated net upfront cost—
How this estimate works
Annual benefit = self-consumed solar × avoided grid rate + exported solar × feed-in tariff. Net upfront cost = installation price minus applicable rebates (floored at zero). Simple payback divides net cost by annual benefit.
All results are illustrative estimates, not quotes or guaranteed savings. Enter your own tariffs and consumption data. Check your provider's current terms before making a purchase.
Frequently asked questions
Is this a guaranteed payback period?
No. Real results depend on installation, tariffs, weather, shading, system degradation and changing usage.
Are Australian rebates included automatically?
No. Enter only a confirmed applicable rebate.