Double glass module thickness exceeds the standard

When modules were small, or when they had a single sheet of glass, 3.2-mm glass was common. But now, both thin-film and crystalline silicon double-glass modules almost always use glass thinner than 3.2 mm— usually just 2 mm—to reduce weight and material use (Zuboy et al. 2024).

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 ].

But now, both thin-film and crystalline silicon double-glass modules almost always use glass thinner than 3.2 mm— usually just 2 mm—to reduce weight and material use (Zuboy et al. 2024). This change of thickness affects multiple risk factors for breakage, as we describe below.

The maximum deformation of long side is tested according to the mechancial load of +5400 Pa for DH1000h, and -5400 Pa for DH2000h. Test result is that double glass module has no problems such as bubbles and delamination after tested under the condition of distortion +DH2000h, and the power loss is 2%.

The double glass module is superior to the conventional single glass module, which indicates that the encapsulation reliability risk of double glass module is good without delaminating risk. 90 Jing Tang et al. / Energy Procedia 130 (2017) 87–93 4 J. Tang et al./ Energy Procedia 00 (2017) 000–000 Fig. 3.

ABSTRACT: Double-glass modules provide a heavy-duty solution for harsh environments with high temperature, high humidity or high UV conditions that usually impact the reliability of traditional solar modules with backsheet material.