Snail trails, also referred to as snail tracks or worm marks, manifest as localized discoloration lines that develop on solar panels over extended periods of use. Typically appearing as dark or brown lines, these trails tend to emerge in proximity to busbars, along solar edges .
Solar panel discoloration is typically the result of long-term exposure to the elements, such as sunlight, rain, and dust. This issue may affect the aesthetic appearance of the panels, but it does not generally impact their functionality or efficiency.