Poly Crystalline Solar Modules

Polycrystalline solar panels are one the most economically viable photovoltaic solar collectors!

Polycrystalline solar panels are the most economical and common solar panels on the market today. They look a lot like shattered glass. They are slightly less efficient then the monocrystalline solar panels and less expensive to produce. Instead of one large crystal, this type of solar panel consists of multiple amounts of smaller silicon crystals. Polycrystalline solar cells are made by heating the silicon from multiple crystals of silicon and pouring the molten silicon into a mold. The resultant square cells are soldered together and sealed under glass to make panels that are about one meter squared. Even though in terms of performance polycrystalline silicon panels are not as efficient as monocrystalline panels and have a lower return electricity rate of 12-14%, the square shape of the polycrystalline solar cell ensures less space is wasted on the module itself. Often, this space gain makes up for lower efficiency, keeping the power per given area comparable to monocrystalline modules. The production process allows the quality of silicon for polycrystalline cells to be lower than for monocrystalline cells, and the cost of polycrystalline cells is correspondingly lower. A polycrystalline panel is optimally placed on a south-facing roof with minimal shade coverage. As the production process of polycrystalline panels is similar to that of monocrystalline panels, the durability is parallel. Crystalline panels typically have a warranty of 25 years, so the initial cost will likely be recouped.

We have wide selection of polycrystalline solar panels that will give you maximum output at very great prices.

These solar PV panels are also made from silicon, but the silicon used is slightly less pure and they are cast into blocks rather than sawn from a single crystal. This is why the crystals are visible – they are randomly arranged. Once cast, they are sawn into square blocks and then into wafers and cells like mono crystalline, but a little easier to make. They are very similar to single-crystalline in performance and degradation, except the cells are typically slightly less efficient, typically 11- 14%. However, because there is no wasted space between the corners of the cells, when they are encapsulated in solar PV panels, the performance is relative to the mono crystalline solar PV panels.

They are Ideal for:

  • Residential and commercial applications where cost savings, installation time, and aesthetics matter most.
  • Best Choice for Installers
  • Lower equipment cost.
  • Reduce labor costs on roof by 25% or more.
  • Leverage a built-in grounding system — if it’s mounted, it’s grounded.
  • Ultra-low parts count — eliminates rails, screws, mounting clips, and grounding hardware.
  • Best Choice for Homeowners
  • Cut total installed costs with savings across equipment and labor
  • Take advantage of the strongest module system yet, requiring minimal roof penetrations.
  • Invest in an attractive solar array that includes a black frame, low mounting profile, and aesthetic array skirt.
  • Increase energy output with flexible mounting options (portrait or landscape).
  • Trust in the reliability and theft-resistance.
  • Extensive 5-year limited product warranty and a 25-year limited power warranty.
  • Limited power warranty* = 90% of the minimum rated power output for 10 years, 80% of the minimum rated power output for 25 years.

Used for various applications:

  • On-grid residential roof-tops
  • On-grid commercial/industrial roof-tops
  • Solar power stations
  • Other on-grid applications

And comes with certified quality:

  • IEC61215/IEC61730, UL 1703, TUV, CEC Listed, CE
  • ISO9001:2008: Standards for quality management systems
  • ISO/TS16949:2009: The automotive quality management system

Q. What is the difference between a monocrystalline vs. polycrystalline photovoltaic cells?

A. You have heard the terms monocrystalline and polycrystalline used to describe photovoltaic cells, but what does that mean and how does it affect a cell€™s performance? The main ingredient in most photovoltaic cells is silicon €“ the same element that makes computer chips possible. Silicon is the second most abundant element in the Earth€™s crust, but unfortunately it is normally found in the form of silica (the chemical symbol for silica is SiO2) €“ you might know it as sand.Various methods exist to extract the pure silicon, but the most common is carbothermic reduction, where the silica is heated to 1700°C in the presence of carbon. As the silicon cools it forms crystals. The speed at which the silicon cools is one of the critical factors that determine the crystal size: the slower the silicon cools, the larger the crystals. With care the silicon can be extracted as one large crystal. As you might imagine, that€™s more difficult, which means it€™s more expensive. The difference between monocrystalline vs. polycrystalline solar cells is simply that one is produced from a single crystal of silicon and the other is produced from a piece of silicon consisting of many crystals.

Q. What is the impact on the cells performance?

A. Since polycrystalline cells contain many crystals, they have a less perfect surface than monocrystalline cells. This means that they absorb slightly less solar energy and produce slightly less electricity per square meter. On the plus side, the process of creating the silicon for a polycrystalline cell is much simpler, so these cells are generally cheaper per square meter. On balance, the cost of monocrystalline vs. polycrystalline based panels per Watt of power output works out about the same, but the polycrystalline panels will be slightly larger than equivalent monocrystalline panels. This is generally not a problem unless you have a very limited area available for the installation, in which case you will want to maximize the power output per square meter. Monocrystalline and polycrystalline can also look different. Monocrystalline cells will usually have a perfectly uniform appearance, but polycrystalline cells will appear €œgrainy€ €“ think of how a granite worktop looks and you€™ll get the idea. From a distance this will not be noticeable, so if they are going on your roof this is unlikely to worry you.

Q. Which do I choose?

A. At the end of the day, unless you are very space constrained, your choice of panel will probably be dictated by factors other than whether they are made up of mono or polycrystalline cells. The price per Watt is an important factor, and that is largely unaffected by the choice of monocrystalline versus polycrystalline cells. In some circumstances, the area available for the installation may be a factor that pushes you to go for monocrystalline cells.

Q. Is there a difference in Pricing?

A. Monocrystalline solar cells cost more than polycrystalline for the same size.

Q. Which is more efficient?

A. Monocrystalline cells have a higher efficiency than polycrystalline cells due to the structure being made from one large crystal as opposed to many small ones. In addition to having an overall better efficiency, monocrystalline panels can perform up to 10% better than polycrystalline panels in high ambient temperatures and since monocrystalline panels are more efficient per area, the size of the solar panel is less than a polycrystalline solar panel for the same wattage. If you are limited on size and want to get the most energy possible, monocrystalline panels are the better choice.

Q. Which is more aesthetically pleasing?

A. In terms of looks, monocrystalline panels have a nice uniform color and have a more circular cell shape. Polycrystalline cells are in squares and have inconsistencies in the color sort of like granite.

Q. Which type last longer?

A. Monocrystalline panel has the potential to last up to 50 years, even though most warranties only go up to 25 years while polycrystalline panels are able to last just over 30 years.