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Why Are Solar Panels Blue?

September 13th, 2021 | By Roger Kuznia

Home solar panels on roof

It is becoming an increasingly common sight to see gleaming solar panels covering rooftops. As you check them out, you might wonder why some solar panels look blue. Is it due to the metal being used? Do solar panel companies purposefully make the panels blue? 

As experts in the rapidly-growing solar power industry, we can tell you: Neither of these assumptions is correct. It actually comes down to the type of silicon used in production! In order to answer this question fully, we’ll have to talk about the difference between polycrystalline versus monocrystalline solar panels — and you’ll learn a lot. 

What Are Polycrystalline Solar Panels?

Polycrystalline solar panels are the ones that appear to be blue. This is due to the formation of the silicon used in their production. Silicon is not a metal but rather a metalloid, and it helps conduct solar power through the panels. You’ll find it used in a lot of modern electronics. 

The silicon appears blue from the pouring and forming process. When being poured into its mold, the silicon does not align fully, leading to the formation of countless individual silicon crystals in the mold. You can see these crystals as the shimmering blue speckles in many polycrystalline solar panels. 

Many solar panel producers include a blue, anti-reflective coating to make the panels more efficient. 

What Are Monocrystalline Solar Panels?

If you’ve seen solar panels that appear black, you’ve spotted monocrystalline solar panels. These panels are made of highly pure silicon, meaning the silicon formed one whole crystal during the pouring process. Thus, there are no individual crystals like in polycrystalline panels, and these solar panels are more efficient because of the purity of the silicon. Due to this efficiency, there is generally less need for an anti-reflective coating on the panels, so they appear matte black. This makes it easier to tell monocrystalline and polycrystalline panels apart. 

Blue Versus Black Solar Panels: Which Fits You?

At Pink Energy, we exclusively offer monocrystalline solar panels due to their higher degree of efficiency. Due to the formation of the panels, the silicon is in alignment which allows for the panels to conduct solar power more easily, thereby enabling higher efficiency. . The dark shade of the monocrystalline panels also typically blends the best on rooftops. 

Choose Solar Power & Save

Pink Energy is committed to making solar power available nationwide at affordable prices, so that our customers can do their parts to help the environment and potentially see some savings on their electric bills. We are a leader in the solar industry, and our locally-based team of solar experts would love to chat about what your future with solar could look like. Get in touch with us today to learn more about how solar panels work or for a free quote on the right solar panel system for you! 

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