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Do solar panels lose their power over time?

The short answer: Yes, but much slower than you think!

Thanks to modern N-Type TOPCon technology in 2026, premium panels degrade by just 0.35% to 0.4% per year. That means your system will still pump out over 85% to 88% of its original power after 25 years.

Combined with rapid payback periods of just 3 to 4.5 years, the long-term ROI on solar is stronger than ever.
https://solarbazaar.io/knowledge/cost-roi/solar-panel-degradation-roi-2026

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Solar Panel Degradation and ROI: 2026 Guide | SolarBazaar

Solar panel degradation and ROI explained with costs, payback, LCOE, and how tariffs and incentives shape long-term solar value in 2026.