Unfortunately, glass-glass PV modules are, similar to regular PV modules, subject to early life failures. A failure of growing concern are defects in the glass layer (s) of PV modules. The scale of decommissioned PV modules with glass defects will increase with the development of solar PV energy [ 7 ].
2.2. Glass characteristics Glass-glass PV modules generally use 2–3 mm thick glass layers, since thicker glass layers negatively impact the module''s weight and costs, while trends are to reduce glass thickness to below 2 mm [ 10 ].
The relative amount of glass defects ranges from several percent up to one of the most prominent failures of registered PV failures. A customer complaints research, on PV modules after two years of operation, observed glass breakage for 10% of the failure cases [ 28 ].
Glass-glass PV modules currently account for about 15% market share in the PV industry. Nonetheless, these glass-glass designs are predicted to represent up to 50% of the PV market in 2030 [ 10 ]. Glass-glass PV modules have a more durable design and higher mechanical strength [ 11 ].
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