Why do PV panels have white lines?

The answer lies in the way PV panels are designed and constructed. The white lines on photovoltaic modules serve one of three important purposes, depending on whether they’re the gaps, the fingers or the busbars. The gap lines are spaces between the solar cells, through which you can see the panel’s white backing.

What are the white lines on photovoltaic modules?

The white lines on photovoltaic modules serve one of three important purposes, depending on whether they’re the gaps, the fingers or the busbars. The gap lines are spaces between the solar cells, through which you can see the panel’s white backing. The gaps are necessary to allow for thermal expansion of the cells when the panels heat in the sun.

What are the gap lines on solar panels?

The gap lines are spaces between the solar cells, through which you can see the panel’s white backing. The gaps are necessary to allow for thermal expansion of the cells when the panels heat in the sun. Both the fingers and the busbars are electrical conductors.

Why do solar panels have gaps?

The gaps are necessary to allow for thermal expansion of the cells when the panels heat in the sun. Both the fingers and the busbars are electrical conductors. The fingers, or finger-like contacts, are thin, metallic lines that collect and deliver energy from the solar cell to the busbars.

Why do solar panels turn yellow?

EVA helps to maintain UV resistance in solar panels, with ultraviolet rays not being used by the panels, so when lower quality materials are used for this the resistance isn’t as good. Eventually, prolonged UV exposure starts to discolor the EVA, causing it to turn yellow or brown. Again, this happens after the first few years.

What causes solar panel discoloration?

For example, certain chemicals used to treat the glass panels react with chemicals used in the silicon cells, resulting in the formation of acetic acid, which is one of the leading causes of discoloration. However, there is an even more common cause of solar panel discoloration – exposure to sunlight.