What does the edge collapse of photovoltaic glass look like

With the trend towards double glass sided modules as seen in Bifacials, or TOPCon with double glass sided construction, the changes in solar PV module design and materials mean breakages are now a bigger risk than ever. These breakages can be due to many reasons and no single factor bears the sole responsibility of operators' woes.

Studies have found that contact between glass and frames is linked to spontaneous breakage in some PV modules. A recommended solution is using rubbery silicone spacers which maintain separation between the glass and the frame. Many modules already use silicone gaskets, but some designs leave gaps where the glass directly touches the metal frame.

Glass breakage is a growing concern for the solar power plant operators. With the trend towards double glass sided modules as seen in Bifacials, or TOPCon with double glass sided construction, the changes in solar PV module design and materials mean breakages are now a bigger risk than ever.

Double-glass PV modules undergo a lamination process, where two sheets of glass encase the solar cells. During this step, heat and pressure bond the materials together. If the process is not precisely controlled, edge pinch can occur—where the glass edges become compressed unevenly, creating built-in stress. Edge pinch and resultant stress.

Glass on solar panels protects the internal components, keeps out dirt and moisture, and maintains electrical insulation. Earlier, glass breakages were mostly due to clear causes. Impact due to hailstones, wind-blown debris, or even human-caused incidents like vandalism have been one of the common causes.

In a highly competitive solar industry, cost of production, handling, and installation gives the business an edge over competitors. Modern PV modules often use thinner glass to reduce weight and material costs. As per NREL study, while panels commonly used 3.2-mm-thick glass earlier, modern double-glass modules often feature 2-mm glass.