Investment Analysis Tool
Solar Panel ROI Calculator UK
Calculate your complete return on investment for solar panels in the UK. See your payback period and 25-year lifetime earnings.
Solar System Details
Typical: 3400 kWh for 4kW system
Without battery: 30-40% | With battery: 60-80%
UK Energy Rates & Assumptions
Current UK average: £0.34/kWh
Typical SEG rates: £0.06-0.15/kWh
Conservative estimate: 3-5% annually
Your Solar Investment Returns
Total Investment
£7,000
Year 1 Benefit
£768
Savings: £462
Income: £306
Payback Period
9.1 years
Lifetime Returns
5 Year Return
£4,246
10 Year Return
£9,665
25 Year Return
£36,674
ROI Analysis
Total ROI423.9%
Annual ROI17%
Break-Even YearYear 8
Property Value Boost£2,100
Important Notes
- • System performance may degrade ~0.5% annually
- • Maintenance costs typically £100-200/year
- • Figures based on average UK conditions
- • Energy prices are estimated projections
Understanding Your Solar Panel ROI
Payback Period
The time it takes for your cumulative savings to equal your initial investment. Typically 7-12 years for UK homes.
Lifetime Returns
Solar panels last 25+ years. After payback, all benefits are pure profit. Most systems generate £20k-40k profit.
Property Value
Solar panels can increase property value by up to 30% of installation cost, making homes more attractive to buyers.