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 solar panel backsheet is the cover you see on the back side of a solar panel.

It is the last layer at the bottom most of the solar panel, and is typically made of a polymer or a combination of polymers – polyesters, polyamides or flouride-based polymers.

As the backsheet is the component of the solar panel that is directly exposed to the element (other than the glass), it is critical that your solar panel has a backsheet that is of high quality and can withstand various environmental elements for 25 long years.


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


While the backsheet comprises only 3-4% of the total cost of a solar panel, the criticality of a solar panel backsheet is far higher compared to its cost contribution.

So, when you are choosing the next solar panel, spend a few minutes to figure out more about the backsheet. Ensuring that you have a high quality backsheet will ensure that your solar panel can withstand even a very difficult environment for 25 long years.

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