Solar simple payback calculator UK
Compare installation cost with annual bill savings, export income and running costs. Check the formula, worked example and limits before using your own figures.
Enter your figures
Simple payback period
Inputs changed. Select Calculate result to update your estimate.
Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. No discounting, degradation, replacements, finance or price growth. Do not count the same solar electricity as both exported and used at home.
How the solar simple payback calculator uk works
Simple payback = installed cost ÷ (annual saving + export income − annual costs).
Data basis: mathematical formula using your inputs. Example prices and rates are illustrative, not current market quotes.
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Worked example: solar simple payback
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Net installed cost (£)
- 6,000
- Annual bill saving (£)
- 400
- Annual export income (£)
- 150
- Annual maintenance provision (£)
- 50
Simple payback period: 12 years
Simple payback = installed cost ÷ (annual saving + export income − annual costs).
Solar simple payback: questions answered
What does the solar simple payback calculation include?
Simple payback = installed cost ÷ (annual saving + export income − annual costs). Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. No discounting, degradation, replacements, finance or price growth. Do not count the same solar electricity as both exported and used at home.
Using your result
Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.
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