PV-Glasmodul_310Wp_en_PDB_2023-05 dd
Thanks to this approval, our solar glass is now considered a regulated building product (analogous to classic LSG glass) and no longer requires individual approval for each project.
Dual-glass type modules (also called double glass or glass-glass) are made up of two glass surfaces, on the front and on the rear with a thickness of 2.0 mm each. Some manufacturers, in order to reduce the weight of the modules, have opted for a thickness of 1.6 mm. Dualsun has chosen to stay with a thickness of 2.0 mm for reasons explained below.
Bifaciality: The bifaciality of double glass modules produces a gain of around 10-11% compared to the power measured on the front panel alone, for TOPCon type modules under so-called BNPI (bifacial nameplate irradiance) test conditions.
Mechanical constraints on cells: the fact that the structure of the double glass modules is symmetrical implies that the cells are located on a so-called neutral line, the upper part of the module being in compression during a downward mechanical load and the lower glass surface being in tension.
However, dual-glass modules have certain disadvantages that are important to take into consideration during the product design phase. One of the main disadvantages concerns the hail resistance. To simplify, the hail resistance of a photovoltaic panel is mainly linked to that of its upper layer.
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