Discover the 5 main reasons tempered glass breaks, including thermal stress, edge damage, and manufacturing flaws. Learn how to prevent unexpected shattering and ensure safety. . We have seen cases of the glass in solar panels (photovoltaic [PV] modules) breaking differently, and more often, than it did 5 years ago. Several changes have increased the risk of glass breakage. But there is probably no. . Modern PV modules often use thinner glass to reduce weight and material costs which lead to glass breakage. With the trend towards double glass sided modules as seen in Bifacials, or TOPCon with double glass sided. . But from Texas to Thailand, the same problem is appearing: broken glass. The newer thinner glass is just 2.