Panel Degradation Rate

Category: science

The gradual decrease in a solar panel’s power output efficiency over its operating lifespan.

Silicon photovoltaic cells degrade over time due to UV exposure, thermal cycling, and environmental wear. Premium panels typically feature a guaranteed degradation rate of less than 0.5% per year, ensuring the array retains at least 80-85% of its original factory power generation capacity at the end of a standard 25-year manufacturer warranty period.

Common Examples

• Our long-term financial yield projections calculate a standard zero-point-five percent annual panel degradation rate across the array.
• Ignoring the solar panel degradation rate will result in overestimating the system production metrics during years ten through twenty-five.