Tempered glass, the first layer of material in the structure of solar cell modules, can effectively protect the panels and solar cells from physical stress, snow, wind, dust and moisture, while ensuring that sunlight can shine in. Double glass photovoltaic module refers to a photovoltaic cell module formed by a composite layer composed of two pieces of glass and solar cells, and the cells are connected to the lead end in series and parallel. The back of the existing glass solar panel is generally protected by an opaque plate, which is called the back panel. The whole structure is fixed by aluminum frame structure, which provides strength during installation to prevent accidents and misoperation. In other words, from the appearance, the double glass photovoltaic module changes the back material of the existing solar panel to glass.
Advantages and disadvantages of double glass photovoltaic modules and existing glass solar panels:
For traditional solar panels, when the snow gets thicker or people step on it (during installation), the solar cells will obviously bend, resulting in micro cracks on the cells. As the strength of the two layers of glass increases, the deformation of the solar cell will be greatly reduced, and the possibility of forming microcracks on the solar cell will be greatly reduced. Compared with plastic backplane (the backplane material of single-layer glass solar modules), glass is non reactive. This means that the overall structure of the double glass solar cell module (two layers of glass, one layer of solar cell in the middle) has a strong resistance to chemical reactions, such as overall corrosion.
But compared with traditional solar panels, the cost of double glass photovoltaic modules is higher, not only the price, but also the cost of defective rate. Double glass photovoltaic modules are particularly prone to bubbles during lamination. Because both sides are glass, it is difficult to fix it. When the solid glue inside becomes liquid after passing through the high temperature of the laminator, it is easy to slide and move. Secondly, the weight of double glass PV module is higher than that of single glass module. If the weight is required, it is also fatal.
If you want to know more about solar panels, please contact us, the solar panel manufacturer – Huanqi Technology (Shenzhen) Co., Ltd.