Introduction

Solar electricity modules, also known as photovoltaics (PV), capture the sun’s energy and convert it into electricity that you can use in your home. Solar PV modules are made from photovoltaic cells, grouped together in modules. Since solar energy is a renewable resource, by installing solar modules you can generate your own renewable electricity.

Photovoltaic solar modules absorb sunlight as a source of energy to generate direct current electricity. A photovoltaic (PV) module is a packaged, connected assembly of photovoltaic solar cells available in different voltages and wattages.

PV solar modules utilize semiconductor materials, which absorb photons of solar energy and convert them to electrical power. Solar PV modules have a roughly 30-year lifetime. A large stock of raw materials and other valuable components are projected as PV module wastes on end of life.

Solar photovoltaic systems (solar PV systems) are often made of solar PV panels (modules) and inverter (changing DC to AC). Solar PV modules are mainly made of solar photovoltaic cells, which has no fundamental difference to the material for making computer chips.

Solar Modules
Types:
1. Poly Crystalline

Polycrystalline solar modules generally have lower efficiencies than monocrystalline options, but their advantage is a lower price point. In addition, polycrystalline solar modules tend to have a blue hue instead of the black hue of monocrystalline modules.

Polycrystalline solar modules are also made from silicon. However, instead of using a single crystal of silicon, manufacturers melt many fragments of silicon together to form the wafers for the module. Polycrystalline solar modules are also referred to as “multi-crystalline,” or many-crystal silicon. Because there are many crystals in each cell, there is less freedom for the electrons to move. As a result, polycrystalline solar modules have lower efficiency ratings than monocrystalline modules.

Polycrystalline PV modules cover 50% of the global production of modules. And, in Italy, this share is still on the rise. What makes polycrystalline photovoltaic modules so popular? There are multiple reasons:
⦁ Polycrystalline silicon is the most consolidated and tested photovoltaic technology.
⦁ Polycrystalline cells are slightly cheaper than monocrystalline ones.
⦁ The temperature coefficient, i.e., the percentage of efficiency loss at high temperatures, is better than in monocrystalline modules.
⦁ The conversion efficiency in diffused light conditions (e.g. on a cloudy day) is better than in monocrystalline modules.

Poly Crystalline
Mono Crystalline2. Mono Crystalline
Why choose Mono PERC modules for your rooftop solar system?

Monocrystalline cells have a distinctive deep black colour and they are more efficient compared to the polycrystalline modules. A quality mono module, has a typical efficiency between 17% and 20% versus 15% for the polycrystalline solar cells. Monocrystalline modules have also better aesthetics and sleek design. The cells are cut from a cylindrical silicon ingot.Monocrystalline cells have a distinctive deep black colour and they are more efficient compared to the polycrystalline modules. A quality mono module, has a typical efficiency between 17% and 20% versus 15% for the polycrystalline solar cells. Monocrystalline modules have also better aesthetics and sleek design. The cells are cut from a cylindrical silicon ingot.

This technology is best suited for those planning long-term solar projects who want the most efficient and reliable modules. Monocrystalline’s lifespan, performance, and efficiency make them a good investment over a longer period of time. They’re also a good choice when space is an issue, such as in urban settings because their efficiency makes them the smallest solar module per watt available.

Monocrystalline cells (Mono) are manufactured from single silicon crystal. They have high efficiency, better low light performance and long life span owing to the fact that they are made from high quality silicon crystals. As of 2018, Mono Modules account for 50% of global PV cell production. There are other cell developments like bifacial and thin film.

PERC modules have two significant highlights:
⦁ Better flexibility – Provides the end-users with more tilt and placement options without sacrificing efficiency – convenient for residential consumers with space restrictions on roofs.
⦁ Higher Energy Density – Lower levelized energy cost leads to lower payback periods.

We also provide to our customers the latest technology with 25 year warranty on performance. 

To choose between the best monocrystalline solar moduless and best polycrystalline solar modules, you should evaluate them on the following parameters:

⦁ Price:
Monocrystalline solar modules for sale will be relatively more costly compared to polycrystalline solar modules for sale. You should draw a careful cost-benefit analysis and determine your budget in order to make the right choice for you.
⦁ Efficiency:
Among the key advantages of monocrystalline solar modules is their high-efficiency rate. These products are made from superior grade silicone, which has a single-crystal structure. Therefore, electricity flow has minimal resistance in these cells. On the other hand, although one of the advantages of polycrystalline solar modules is their lower price, but their efficiency is also lower (between 14 and 16 percent) due to their reduced silicon purity.
⦁ Lifespan:
 When you compare the initial installation costs between monocrystalline vs. polycrystalline solar modules, you should also look at the average lifespan of each. Monocrystalline solar module manufacturers will usually offer a 25-year warranty because of the longer lifespan of the product. On this parameter of lifespan, polycrystalline solar modules are not very different, but the warranty period offered by the manufacturers may vary.
⦁ Temperature Coefficient:
In warm weather, monocrystalline solar modules can deliver higher efficiency because of their higher temperature coefficient. The output degradation in monocrystalline module is lower as the temperature rises. If you are living in a region where the summers are longer and warmer, you should carefully consider the temperature coefficient of the solar modules you are choosing.
⦁ Aesthetics:
Attractive physical appearance of the solar modules depends on an individual’s personal sense of aesthetics. But many users find that the speckled blue hue of polycrystalline silicon is not too easy on the eyes. Therefore, they may prefer monocrystalline solar modules as they find them more uniform in appearance, and thus more aesthetically desirable.

Monocrystalline or polycrystalline modules: Which one is right for you?
Once you have considered the pros of monocrystalline solar modules versus the pros of polycrystalline solar modules, it gets easier to make your decision. But don’t focus only on the pros, and also dispassionately evaluate the cons of monocrystalline solar modules versus the cons of polycrystalline solar modules.