Solar guide
Solar payback calculator
Compare installation cost against annual solar benefit to estimate break-even time.
Estimate how many years it may take for solar panels to pay for themselves.
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.