Solar panel grid lines are the visual lines present across the surface of solar panels, marking the layout of photovoltaic cells. Familiarize yourself with panel layout, 2. Identify the grid lines' purpose, 3. A solar panel is created by joining multiple solar cells, each of which is typically made from thin sheets of silicon that incorporates boron and phosphorus held between conductor panels. On the surface of these cells, there are two kinds of solar cell grid 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. Utilizing schematics for guidance.