Solar Panel Lifespan UK
Independently written
How long do solar panels last?
Solar panels last 25-30+ years. Degradation: 0.3-0.5% per year. After 25 years: 80-87% of original output — still generating meaningful electricity. The inverter lasts 10-15 years (one replacement needed, £800-£1,500). Mounting system lasts 25+ years. No moving parts = minimal wear. Many panels continue producing useful electricity into their 30s and 40s. The 25-year warranty is a MINIMUM, not a cliff-edge.
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