This question is part of the Super Big Solar Panel FAQ from Solar Mango, where expert answers to over 100 important questions on solar panels are provided.

 

A linear performance guarantee for solar panels works as follows: The manufacturer specifies the performance of the solar panel year on year for 25 years.

Instead of guarantees that end after 10 or 20 years, a Linear Performance Guarantee represents a continually decreasing performance guarantee. This guarantees a maximum performance reduction of a fixed percentage over a period of 25 years. A minimum value is set for the output of the solar modules every year for a 25-year period.

 

Super Big Solar Panel FAQGet to know answers to over 100 important questions on solar panels from here.

 

Such a guarantee means that the guaranteed performance of the solar module is higher at every point in time than with the standard tiered guarantee (which specifies a minimum performance only for a longer time duration and does not vary from one year to another) and therefore provides enhanced output.

While the Linear Performance Guarantee was introduced only a few years back, today, it has almost become the standard for most solar panel manufacturers.

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