Introduction: Solar photovoltaic (PV) technology has evolved rapidly in recent years, leading to the development of innovative module designs. Two prominent variations are mono PERC (Passivated Emitter Rear Contact) and multi-busbar modules. In this blog post, we will explore the significance of these module types and discuss the process differences involved in their manufacturing.
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Significance of Mono PERC Modules: Mono PERC modules have gained popularity due to their improved efficiency and performance. The key significance lies in their passivated emitter rear contact structure. By applying a passivation layer to the rear surface, electron recombination is minimized, resulting in higher energy conversion efficiency. Mono PERC modules typically achieve higher power outputs, making them an ideal choice for installations with limited space or those aiming to maximize energy production.
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Significance of Multi-Busbar Modules: Multi-busbar modules offer enhanced electrical conductivity and reduced resistive losses. Traditional solar cells have busbars that collect and transport the generated electricity. In multi-busbar modules, additional busbars are incorporated, reducing the current path and improving the module's overall electrical performance. This design leads to lower resistive losses and higher power output, particularly in scenarios with partial shading or cell-level mismatches.
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Manufacturing Process Differences: The manufacturing processes for mono PERC and multi-busbar modules differ in several aspects, including cell design, metallization, and interconnection methods.
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Cell Design: Mono PERC cells have a rear contact design, where the rear surface is passivated to reduce recombination. This passivation layer is typically achieved through a thermal or plasma-enhanced chemical vapor deposition process. On the other hand, multi-busbar modules utilize additional busbars placed strategically across the cell surface, allowing for improved current collection.
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Metallization: Metallization is the process of creating the electrical contacts on the solar cells. In mono PERC modules, the metallization process involves applying metal contacts to both the front and rear sides of the cells, utilizing screen printing or laser ablation techniques. Multi-busbar modules also employ screen printing but with additional busbar patterns, enabling better current collection and distribution.
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Interconnection: The interconnection methods vary between mono PERC and multi-busbar modules. Mono PERC modules often use standard soldering or conductive adhesive to connect cells in series, while multi-busbar modules utilize advanced cell interconnection technologies, such as shingling or multi-wire interconnection, to enhance electrical connectivity and minimize resistive losses.
Conclusion: Mono PERC and multi-busbar solar photovoltaic modules represent advancements in module design, focusing on improving efficiency and electrical performance. Mono PERC modules excel in their passivated rear contact structure, offering increased energy conversion efficiency. Multi-busbar modules, with their strategic placement of additional busbars, provide enhanced electrical conductivity and reduced resistive losses. Understanding the significance and manufacturing process differences between these module types can help individuals and businesses make informed decisions when selecting solar PV modules for their installations.
