Solar guide
Solar panel ROI calculator
Estimate long-term return on investment for a residential solar panel system.
Calculate 25-year solar panel ROI using installation cost, savings, export earnings and degradation.
Use the main calculator
The full interactive calculator is available on the homepage. This page exists to explain the specific calculation topic in more detail and to help users understand the assumptions before making decisions.
Key assumptions to check
- Your average electricity price per kWh.
- Your local feed-in or export tariff.
- Average peak sun hours for your region.
- Roof orientation, pitch and shading.
- Installed cost after incentives or grants.