How long is a solar panel warranty?

Solar panel warranties vary depending on the manufacturer, but in the solar industry, a 10-year product warranty and a 25-year performance warranty are typically considered the minimum standard. However, some manufacturers provide a 25-year product warranty and extend the performance warranty to 30 years. How Much Does a Solar Panel Warranty Cost?

What is a performance warranty on a solar panel?

Performance warranties guarantee a percentage of electric power output over the warranty period. Most solar manufacturers offer 25-year performance warranties. The amount of power your solar panel can output declines steadily over that period.

How long does a solar panel's power warranty last?

Most solar panel power warranties nowadays offer linear degradation, meaning a 0.7% output loss per year. However, some manufacturers like SunPower offer a much higher output guarantee after 25 years. In the past, power warranties were stepped, guaranteeing 90% output after 10 years and 80% output after 25 years.

How do I get a solar panel warranty?

Generally, the most robust warranties are obtained by hiring installation companies certified by the solar brands they represent. Alternatively, long warranties can also be secured from solar manufacturers that provide their own installation services. What Is Not Covered by a Solar Panel Warranty?

Why do solar panels have warranties?

Warranties serve as a testament to the quality of a product. Companies typically offer superior warranties for products of higher quality. While solar panel failures are exceedingly rare due to their design to endure for decades and withstand harsh weather conditions, occasional errors may still occur.

What does a solar installation warranty cover?

While manufacturer warranties primarily cover issues related to the solar panels themselves, such as material defects, workmanship defects, and loss of power output, the solar installation warranty extends additional protection to the entire photovoltaic system.