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Difference between PV Shingled Modules and Ordinary Modules

Shingled modules are arranged in a series-parallel structure of photovoltaic cells in close proximity to each other, almost eliminating the need for welding tapes and allowing more than 13% of the cells of a conventional module to be placed in the same area of the module. Therefore, shingled modules have the advantages of high output power, low internal loss, and small reverse current hot spot effect. The key to shingled module technology is the reliability of the cell connection. China’s PV industry is actively promoting the technological development and large-scale manufacturing of shingled modules

Difference between photovoltaic shingled modules and ordinary modules

The differences between the two are as follows:

First, Lower risk of hidden crack

With the module of shingling technology, the cells are flexibly connected by conductive adhesive, with uniform stress distribution, which can not only adapt to thinner silicon wafers, but also make the risk of hidden cracks lower.

Traditional components in use in the process of hidden cracks, the hidden crack length of the maximum possible extension of the entire length of the cell (1/2 length of half a piece), the maximum possible extension of the entire 1/6 of the cell (the number of slices to determine the) stacked components. Stacked components can effectively limit the impact of hidden cracks to a smaller area, even if hidden cracks occur, the power loss of the component will be less.

Second, the impact of shading is smaller

The shading of PV power station will not only reduce the power generation efficiency of the module, but also may lead to the generation of hot spots, which will bring hidden danger to the safety of the power station. Compared with ordinary PV modules, the impact of shading on shingling module is much smaller.

When the module is installed vertically, blocking the lowest string, the power attenuation of the conventional half-piece module is 50%, and the power attenuation of the conventional whole-piece module is 100%. The power attenuation of stacked-watt module is only 33% for single-cell failure; when the module is horizontally mounted, the power attenuation of conventional whole and half-cell modules is 33%, while the power attenuation of shingled module is only 17% for single-cell failure.

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