Solar Degradation Calculator
Estimate solar panel output decline over a 25-year lifespan.
Inputs
kWh/yr
%
%
years
$/kWh
Results
Final Output %
86.9%
Final Year Output
8,689 kWh
Lifetime Production230,848 kWh
Revenue Lost to Degradation$2,873
How to Use This Calculator
- Enter the panel's initial rated power output in watts.
- Set the first-year degradation rate (typically 2–3% for most panels).
- Input the annual degradation rate after year 1 (typically 0.5–0.7%/year).
- Enter the number of years to project.
- Review the remaining power output and cumulative energy production loss over the system life.
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