Mono Crystalline Versus Poly Crystalline Solar (PV) Panels-Which is better?




The question arises, what is our goal when we want to install solar panels to generate electricity for our homes and offices? Definitely to reduce the cost of electricity bills and reduce the carbon emission footprint.

The major types of solar panels module used in Africa, especially in Nigeria are the Monocrystalline Modules and Polycrystalline Modules amongst others. But the problem arises on what choice of solar panel is good for your project.

Many issues have been raised on which of these two modules is better, but who should you listen to in this regard?

When it comes to choosing the most appropriate photovoltaic modules for a project, consumers are faced with countless choices regarding quality, performance, and price. As with most things in life, people are trying to get the best deals, often sacrificing performance for a competitive price. While trying to keep your costs low is understandable, sacrificing performance over price can impact your project severely. That’s why we here at PSC SOLAR INDUSTRIES have created this small guide to help you navigate the sea of information related to buying solar panels for generating energy. In this article, you will learn everything you need to know about the differences between monocrystalline modules and polycrystalline modules.

What are Monocrystalline Solar Panels Modules?

This is the technology that started the photovoltaic revolution. Originated in the 1950s,
monocrystalline solar panels are the oldest and most developed system to date. As the name suggests, they are made from a single crystal of pure silicon. Manufacturers use the Czochralski method to slowly pull a single silicon crystal seed out of melted monocrystalline silicon and form an ingot.  A crystal seed is a small piece of silicone which is used as a base for the molten molecules. By providing the right infrastructure, the molten molecules can connect to form an ingot. While the seed is being drawn up, the temperature is lowered gradually to help form a cylindrical shape.

Monocrystalline modules can be recognized by their uniform coloring and look, which indicate the high purity of silicon.

What are Polycrystalline Solar Panels Modules?

Polycrystalline solar panels are made up of multiple crystals. Instead of going through the slow and very expensive process of creating a single crystal, manufacturers simply put a crystal seed in a cast of molten silicon and allow it to cool. Due to this casting method, the crystal surrounding the seed isn’t uniform and grows into multiple small crystals.

What Is the Difference Between Monocrystalline and Polycrystalline Solar Panels?

The differences between monocrystalline modules and polycrystalline modules derive from the process they are created. Mono solar panels are made from a single crystal seed, either found in nature or created in a laboratory. As a result, they have a more uniform and smoother appearance than polycrystalline modules. Poly solar panels, on the other hand, are created from blocks of crystals which give the module a metal-flake effect.

Advantages and Disadvantages of Monocrystalline Solar Panels Modules


  • Mono solar panels have the highest efficiency rate (usually around 15%-20%);
  • Monocrystalline modules are space-efficient. Because these modules deliver the highest power output, they require the least amount of space comparing to other solar panels;
  • Mono solar panels have a long lifespan – most manufacturers offer a 25-year warranty on their mono solar panels;
  • They perform better than other types of solar modules in low-light conditions.


  • Monocrystalline modules are the most expensive;
  • If they are covered with dirt, the entire system may be affected;

Advantages and Disadvantages of Polycrystalline Solar Panels Modules


  • The process used to manufacture poly solar panels is simpler and, thus, less pricey.
  • They usually have a lower heat tolerance than monocrystalline modules.


  • Because the silicon purity is lower than mono modules, poly solar panels are less efficient than their mono counterparts. Their efficiency is usually rated at around 13%-16%.
  • Not only that they are less energy efficient, but they have a low space efficacy as well. You need to cover a larger surface to get the same power as you would with monocrystalline modules.

Which One Should I Choose?

The larger and purer the crystal is, the more efficient the solar cells will be. As a result, monocrystalline modules are around 10% to 15% more energy efficient than their poly counterparts.

Polycrystalline modules, on the other hand, were often thought to be inferior to mono solar panels because they are less efficient. But, here’s the catch: because of the cheaper process, it costs around 20% less to create solar modules with monocrystalline structures. More than that, poly modules have been improving their performance constantly in recent years, pushing the standard to greater limits.

So, which is better?

The answer depends on your project’s specification. Poly modules, for instance, are ideal for projects with large roof or ground space. They are also great for consumers on a tight budget who are looking for ways to keep installation costs to a minimum.

Mono solar panels, on the other hand, are perfect for small roofs or space-constrained properties. Since monocrystalline modules are very efficient, you will get more power onto the same surface area. Moreover, these panel types have a lower temperature coefficient than poly modules.

Monocrystalline modules are more expensive than poly modules, but they take up less space. For instance, if you have one mono and one poly solar panel, both rated at 240-watt, they would generate the same energy, but the monocrystalline solar module would take up less space.

If cost is your major concern and you want to pay as little as possible for installation, then you should opt for poly solar panels. You won’t get the same efficiency as with monocrystalline modules, but you’ll reduce the initial costs dramatically.


In Conclusion, it is better to know that any of these two panels have their pros and cons which is why we at PSC SOLAR INDUSTRIES encourage our clients to contact us whenever they have issues regarding photovoltaic modules. As aspiring leaders in PV energy solutions in Africa and especially in Nigeria, we are focused on providing our customers with the best products to meet their specific needs.

If you are ready to take a step towards going solar, contact us and we will guide you through the process.

Mr. Michael Edun is a Senior Technical writer and IT Manager at PSC SOLAR (UK) LTD. Lagos, Nigeria. – 08120855444

Please Feel Free to Post Your Comments …………….

17 thoughts on “Mono Crystalline Versus Poly Crystalline Solar (PV) Panels-Which is better?

  • August 14, 2017 at 1:56 pm

    for a turnkey modular smaller installation, which of the solar panels are good to use, putting in mind different states in Nigeria.

    • August 14, 2017 at 2:12 pm

      Nigeria is a place or country where the sun is really endowed on us. Both panels are good depending on your capability in term of your financial strength. But in my our view mono can be more efficiency compared to poly.

  • September 30, 2017 at 12:39 am

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  • January 14, 2018 at 3:23 pm

    How can I get fe-silicon panel

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  • February 16, 2018 at 4:42 pm

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    • February 16, 2018 at 4:56 pm

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  • February 27, 2018 at 9:59 am

    If you would like to improve your knowledge just keep visiting this web site and be updated with the most recent information posted

  • June 13, 2018 at 9:37 am

    Tks you post
    In Conclusion, it is better to know that any of these two panels have their pros and cons which is why we at PSC SOLAR INDUSTRIES encourage our clients to contact us whenever they have issues regarding photovoltaic modules. As aspiring leaders in PV energy solutions in Africa and especially in Nigeria, we are focused on providing our customers with the best products to meet their specific needs.

  • August 16, 2018 at 8:20 am

    How many mono panels will i need to power a 3.5kva inverter

    • August 31, 2018 at 1:10 pm

      In respect to our specification of our Inverter system which is 3.5KVA/48V, you will need 2 mono solar panels have 24V (2 x 24V/275W). Thanks

  • October 30, 2018 at 8:12 am

    Hi, I think your site might be having browser compatibility issues.
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    heads up! Other then that, fantastic blog!

  • November 26, 2018 at 12:05 pm

    Do PSC Solar Industries offer services ranging from selling of accessories to installation of solar power system? If yes, i need a price list of 2.5kVA with backup both on accessories.
    Thank you.

    • November 30, 2018 at 6:49 pm

      Okay Sir, we will send it to you

  • December 4, 2018 at 10:29 am

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  • December 27, 2018 at 3:07 am

    I agree with you however, what about the packing factor, as you know the packing factor for Poly more than the mono, so, the almost give the same power for same area or space. do you agree with me?!


  • April 15, 2019 at 12:43 am

    Good web site you have got here.. It’s difficult to find excellent writing like yours
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