The most common cause of a broken solar panel is cracked glass. Once you have replaced the broken solar panel . How to repair broken solar panel glass depends on the damage, but here are three main DIY methods: Quick Repair Methods: Important: These are temporary fixes that may reduce efficiency. Severe damage requires professional replacement. A crack in your solar panel glass doesn't mean your investment. Modern PV modules often use thinner glass to reduce weight and material costs which lead to glass breakage. It is also important to have a qualified technician replace the glass on your solar panel to ensure that it is installed. We have seen cases of the glass in solar panels (photovoltaic modules) breaking differently, and more often, than it did 5 years ago. Several changes have increased the risk of glass breakage. Not from hail or mishandling, but from cracks that spider from frame edges, splinter near clamps, and web across modules. Everyone should pay attention to the protection of PV panels during the process of purchase and transportation and installation, otherwise it will.