Solar panels are incredibly efficient at converting sunlight into electricity, but they’re also very sensitive to shading. Even a small amount of shade can have a drastic impact on their power output. As we transition into late autumn, with the sun lower in the sky than in June, shading on panels becomes even more severe, further reducing their performance.
Here’s a breakdown of how shading affects solar production, based on recent tests:
Why Does Shading Have Such a Big Impact?
Each cell in a solar panel is part of a series circuit, meaning the current flowing through each cell is interdependent. When one cell is shaded, it limits the current for the entire row, effectively reducing the panel’s output. This characteristic, known as the “Christmas light effect,” can completely stop power production if enough shading is present, as shown in our test.
In summary, even minor shading, such as a nearby branch or a rooftop obstruction, can drastically reduce solar panel efficiency. It’s essential to consider shading when installing solar panels.
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