How Long Do Solar Panels Last? (2026 Lifespan Guide)
Published 2026-02-20 · Updated 2026-07-07 · MySunROI Research Team
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Modern solar panels last 25–30 years with minimal maintenance. Most manufacturers guarantee at least 80% output at year 25. Understanding lifespan helps you model true ROI beyond payback.
Expected solar panel lifespan
Tier-1 panels degrade ~0.5%/year — a 400W panel still produces ~350W at year 25. Inverters may need replacement at 10–15 years ($1,000–$2,500).
- Panel warranty: 25 years typical
- Inverter warranty: 10–25 years
- Workmanship: 10–25 years installer warranty
What affects longevity
Quality installation, climate, and maintenance affect lifespan. Hail and hurricane zones need rated mounting.
- Extreme heat reduces efficiency slightly
- Coastal corrosion — verify frame rating
- Maintenance costs are low ($150–$300/year optional cleaning)
Solar costs by state
Frequently Asked Questions
Do panels stop working after 25 years?
No — they continue producing at reduced output. Many systems run 30–35 years.