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.


Many purchasers of solar panels have not heard about anti-reflective coating. But they should have!

Wherever glass meets air, about 4% of the light hitting the glass at a perpendicular angle is reflected. And that percentage rises steeply as the light’s angle of incidence increases. Obviously, for solar energy systems, reflected light is wasted light!

AR coating on solar panels perform the simple function of reducing the amount of light reflected from the glass of the solar panel. This is important, as you will want as much sunlight to pass through the glass and as little as possible to be reflected, in order to maximise electricity generation!


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Studies by prominent solar panel makers have shown that energy production gain from modules with anti reflective coating was to the tune of 3.5-5% depending on the type of installation and location. That’s a lot of units added over 25 years!

Check with your vendor or installer if the solar panel has AR coating or any other of its equivalent, before you purchase the solar panels.

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