Calculate potential savings from installing solar panels on your UK home.
Annual Benefit
£522
Payback: 11.5 years
Annual Generation
3600 kWh
Bill Savings
£441
SEG Income
£81
25yr ROI
118%
Solar panels are a significant investment, but they can pay for themselves over time through reduced electricity bills and payments from the Smart Export Guarantee (SEG). This Calculator Site tool helps you estimate the potential return on investment for a UK home. The key to maximising savings is self-consumption: using the electricity you generate to power your home, rather than buying it from the grid.
Any surplus electricity you generate is exported to the grid, and the SEG scheme pays you for it. Rates vary, but our calculator helps you see how this income, combined with bill savings, contributes to your payback period. For more detailed bill analysis, check our Energy Bill Calculator.
Maximise Your Self-Consumption
The electricity you use yourself is worth much more (the ~25p/kWh you save) than the electricity you export (the ~5-15p/kWh you earn). To shorten your payback period, shift your energy usage to daytime hours. Run appliances like your washing machine, dishwasher, or electric vehicle charger when the sun is shining to use the free electricity you are generating.
The cost of solar panel installation has fallen dramatically in the last decade, making it a viable option for millions of UK homeowners. Government schemes and rising electricity prices have further boosted adoption. See how your potential savings stack up against the national picture. You can also calculate your property's potential with our Stamp Duty Calculator if you are considering a move.
7-12
Typical payback period (Years)
1.5 Million+
UK homes with solar installations
~£6,000
Avg. cost for a 4kWp system
How to use this Calculator Site tool
Enter your expected system size, installation cost, and current electricity rate. Adjust the self-consumption percentage based on when you use most of your energy. The calculator will then estimate your annual savings, SEG income, and the all-important payback period to help you make an informed decision. For official SEG details, visit GOV.UK Smart Export Guarantee guide.
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