4 FAQs about White spots on photovoltaic panel glass

What causes solar panel discoloration?

However, in the realm of solar panels, this discoloration is a deeper phenomenon with potential consequences. Solar panel discoloration is a physical change in the panel's color due to environmental factors or material degradation, especially the yellowing or browning of their once clear and shiny surfaces.

What are the different types of solar panel discoloration?

Let's explore the most common types of solar panel discoloration: One of the most noticeable forms of discoloration is the yellowing or browning of the solar panels. This issue occurs due to the degradation of ethyl vinyl acetate (EVA), a material used as an encapsulant in the panel.

How does UV damage a solar panel?

UV radiation harms the panel's surface and its internal parts. It penetrates deep and causes long-term damage. Water in solar panels causes discoloration and lowers performance. Even with impermeable glass backs, moisture can enter through the edges over 20 years.

How do you know if a solar panel has a hot spot?

You can detect an emerging hot spot with an infrared camera only. Eventually, hot spots in solar panels become visible to the eye: the problematic cell becomes brownish. Hot spots lead to a faster solar panel degradation and can even start a fire on your roof. To avoid that, clean your panels from dirt every now and then.

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