Difference Between Poly & PERC Modules?

Poly Modules and Mono PERC (Passivated Emitter Rear Cell) Solar Panel Modules are two common types of solar panels (PV Modules) used in photovoltaic systems. Here are the key differences between them:

  1. Material and Cell Structure:

    • Poly Modules (Polycrystalline): Poly modules are made from multiple silicon fragments melted together. They have a less uniform appearance, with a blue speckled look.
    • Mono PERC Modules (Monocrystalline with Passivated Emitter Rear Cell): Mono PERC modules are made from a single crystal structure, resulting in a more uniform and black color appearance.
  2. Efficiency:

    • Poly Modules: Poly modules are generally less efficient than mono PERC modules. They typically have lower energy conversion rates, which means they generate less electricity for a given surface area.
    • Mono PERC Modules: Mono PERC modules are known for their higher efficiency. The single-crystal structure allows them to convert more sunlight into electricity, making them more efficient in terms of power generation.
  3. Space Efficiency:

    • Poly Modules: Poly modules require more space to generate the same amount of electricity as mono PERC modules. This can be a consideration when space is limited.
    • Mono PERC Modules: Mono PERC modules are more space-efficient and are a good choice when you have limited installation space.
  4. Cost:

    • Poly Modules: Poly modules are often less expensive to manufacture than mono PERC modules, making them a cost-effective option for some applications.
    • Mono PERC Modules: Mono PERC modules are typically more expensive due to their higher efficiency and manufacturing process, but they can offer better long-term returns due to increased power generation.
  5. Temperature Sensitivity:

    • Poly Modules: Poly modules are generally more temperature-sensitive, meaning their efficiency decreases as temperatures rise.
    • Mono PERC Modules: Mono PERC modules tend to have better temperature coefficients, which means they maintain higher efficiency in hot weather conditions.

In summary, the choice between poly modules and mono PERC modules depends on factors like space availability, budget, and desired efficiency. Mono PERC modules are known for their higher efficiency and space efficiency, making them a popular choice for residential and commercial installations. Poly modules can be a cost-effective option for projects where space is not a constraint and budget is a consideration.

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