Solar panel degradation, what to expect over 25 years

Typical degradation curves (~0.5% per year), warranty thresholds, and how to factor degradation into projections.

Typical degradation curves (~0.5% per year), warranty thresholds, and how to factor degradation into projections.

This guide is being expanded with detail. In the meantime, the topic is covered in more detail in our other guides, see the links at the foot of this page.

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