Solar: The 25-Year Journey

What happens over 25 years of solar?

The 25-year solar journey: YEARS 1-8: Building equity. Saving £580/yr. Cumulative savings approaching investment cost. YEAR 8-10: BREAK EVEN. Investment recovered. Everything from here is profit. YEAR 12: Inverter replaced (£1,000). Minor setback, quickly recovered. YEARS 12-25: PURE PROFIT. £580/yr × 13 years = £7,540 additional profit. YEAR 25 TOTAL: £14,500 savings - £7,750 costs = £6,750 net profit (100% ROI). With battery + smart tariff: £27,000 savings - £16,250 costs = £10,750 net profit. Panels still working at 85-90% — many owners continue to year 30+.