Solar Panel ROI Timeline: Year by Year
Independently written
What is the year-by-year ROI of solar panels?
Solar ROI timeline for a 4kW system (£6,750): Year 0: -£6,750 (investment). Year 5: -£3,850 (saving £580/year). Year 8-10: break even. Year 12: inverter replaced (-£1,000, but cumulative savings cover it). Year 15: +£3,950 profit. Year 20: +£6,850 profit. Year 25: +£7,750 net profit (100%+ ROI). The majority of the financial benefit comes in years 12-25 — after payback and after the one inverter replacement.
Find out how much you could save
Answer a few questions and receive personalised solar quotes — completely free.
Start My QuoteFree, no obligation. Takes 2 minutes.
Frequently Asked Questions
Ready to see what solar could save you?
Get free, no-obligation quotes from MCS-certified installers in your area.
Get Free QuotesFree, no obligation. Takes 2 minutes.