Most commercial solar panels have an expected service life of 20–30 years. Over time, panels gradually lose output each year — this is known as performance degradation.
Efficiency Over Time
With an average degradation rate of around 0.5% per year, you can expect your panels to retain approximately 80% efficiency after 10 years, depending on the environment and maintenance.
What This Means for Your System
- Consistent performance: Even after a decade, panels continue to deliver reliable power output.
- Maintenance matters: Routine cleaning and inspections can help preserve efficiency and longevity.
- Long-term value: Quality solar panels provide dependable performance well beyond their warranty period.
Expect a solar panel lifespan of 20–30 years with about 80% performance after 10 years. Regular upkeep ensures optimal output and long-term reliability for your commercial PV investment.