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Horizontal Layout vs. Vertical Layout: Larger Shading Area, Yet Higher Electricity Generation?

Horizontal Layout vs. Vertical Layout: Larger Shading Area, Yet Higher Electricity Generation?

There are two ways of arranging components in photovoltaic power stations, horizontal and vertical. Horizontal means that the long side of the component is parallel to the east-west direction, while vertical means that the short side is parallel to the east-west direction. Whether to use horizontal or vertical depends on different situations. Which arrangement is more resistant to shading for the power generation of the components?

Which one has a stronger anti-shading ability, horizontal or vertical?

Shading is the biggest killer of photovoltaic power stations, which can reduce the power generation of photovoltaic systems by up to 90% (Horizontal? Vertical? The consequences of photovoltaic component shading that you don’t know) The lower battery components are easily shaded, and the impact on power generation is different due to the horizontal and vertical arrangement of the photovoltaic components.

According to the power generation principle of the photovoltaic component circuit diagram, it can be seen that when a row of short sides is completely shaded, there is no current in the three branches, causing the component to stop generating electricity, while when a row of long sides is completely shaded, the other two branches will still have current. Horizontal and vertical arrangements produce these two kinds of shading situations.

When the lower part of the component is shaded horizontally, the other two branches still have current:

When the lower part of the component is shaded vertically, the three branches are shaded, and the photovoltaic component no longer generates current:

Therefore, although it seems that the horizontal arrangement of photovoltaic components produces a larger shading area, the horizontal arrangement of components has a much higher anti-shading ability than the vertical arrangement, and the power generation is also higher than the vertical arrangement.

In actual application scenarios, the horizontal arrangement of photovoltaic components is also relatively more than the vertical arrangement.

Horizontal mud belt shading is more serious.

Although the horizontal arrangement has stronger anti-shading ability than the vertical arrangement, in the small area of shading, such as the frame mud belt shading, the horizontal arrangement of components also has a larger shading area than the vertical arrangement.

On the other hand, the low inclination angle of the horizontal arrangement is more conducive to the formation of ash accumulation, which aggravates the mud belt shading.

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