What are Polycrystalline Solar Panels?

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What are Polycrystalline Solar Panels?

Although green energy is becoming more popular, there are still a lot that people do not know about the solar panels used in producing it. When considering installing solar panels, a buyer should become familiar with the different types of solar panels available, and this includes polycrystalline panels. Solar systems are made of a variety of parts, including the panels, batteries, and power inverters. Thus, the buyer should think about these parts when making a purchase.

It is also important that the buyer knows how to properly install and care for the solar panels. The buyer needs to ensure that the panels are installed in a place where they get enough sunlight to provide the needed electricity. Additionally, cleaning solar panels on a regular basis can ensure that they work more efficiently.

More About Polycrystalline Solar Panels

Polycrystalline solar panels are one of the options for those who are looking to obtain green energy. Solar panels that are made of polycrystalline silicon were introduced in the market in 1981. The panels do not use the Czochralski process, a method that yields single crystals. Instead, melted raw silicon is poured into a mould, which is cut into squares after cooling. With this kind of panel, the cells are grown in a large block of many cells. This type of solar panel is a popular choice for residential installations.

Advantages of Polycrystalline Solar Panels

There are a number of advantages to using polycrystalline solar panels instead of other options. For instance, it is cheaper to make polycrystalline silicon than it is to make other kinds of silicon. Additionally, less waste is produced when making polycrystalline than when making monocrystalline. Although polycrystalline solar panels used to be slightly less tolerant to heat, which can damage the solar panels, over time, they have been improved to provide better performance.

Disadvantages of Polycrystalline Solar Panels

With an efficiency of between 13 and 15 per cent, polycrystalline solar panels are not quite as efficient as monocrystalline panels. Polycrystalline panels are also a little larger than other types of solar panels and therefore take up more space. Additionally, these solar panels have a speckled blue colour, which some people do not like because they think it draws too much attention to the home.

Components of a Solar Panel System

In addition to the solar panels, a number of other components make a polycrystalline solar panel system work. When looking at a solar energy system, the buyer should consider the size of panels. Some of the components that go together with a solar panel include batteries, a charge controller, power inverter, and DC disconnect. It is a good idea for the buyer to know the basics about these various components and solar panel systems in general.

Size of Panels

Part of getting the right solar panel means knowing what size panels to choose. It is important to know how many panels are needed to provide the energy needed for one's home.



Peak Output

12- volt panel

Traditionally 63.5 cm by 137 cm

17 volts

24-volt panel

Two 12 volt panels put together

24 volts

The above numbers are rough estimates. The buyer should consult a professional to determine what size panels are necessary to produce the amount of electricity a household needs.

Charge Controller

A charge controller regulates the volts that go into the battery and protects the battery discharge at night when the house needs to draw on reserves. This piece is essential as it can harm the battery if the charge is not regulated.


Solar panels convert the sun's energy to electricity, but they do not actually store electricity. Unless the solar panels are connected to an energy grid, the buyer needs batteries to store the electricity that the solar panels create.

Power Inverter

The power inverter is the part that turns the DC power from batteries into the AC power that is commonly used in homes. Inverters usually come in two different types, namely, pure sine wave inverters and modified sine wave inverters.

DC Disconnect

A DC disconnect switch is installed where the solar power cables enter the house. This is applicable only in a grid-tied system.

Installing and Caring for Polycrystalline Solar Panels

Before purchasing polycrystalline solar panels, it is important to know where one is going to locate them and how to properly care for them. Fortunately, solar panels tend to be fairly low maintenance, and caring properly for solar panels can ensure that they are more efficient and work better.

Installing Solar Panels

When deciding where to install the solar panels, the buyer needs to think about the location. Solar panels need to be in sunlight to work correctly, so one should make sure that the panels are not in shade for peak hours, which is usually between 9 a.m. and 4 p.m. Having the solar panels in shade not only interferes with the output of the panels, but it could also damage them. Some solar panels are advertised as being able to withstand the shade, but the buyer should still be careful about installing them in a very shady place.

Caring for Solar Panels

Solar panels are popular because they tend to be low maintenance. The panels need to be kept clean because they operate more efficiently that way. The homeowner should brush dirt and any debris off the solar panels. The surface area and the frame of the panels should be wiped with a damp cloth. Mild soap can be used to tackle dirt and grime on the panels, which can then be dried off with a cloth.

It is also important to check if there are any loose wires or cables, which could be loosened by wind or storms. A homeowner should never bend solar panels because it can damage them. One should also follow the instructions for a particular brand of solar panel.

Buying Polycrystalline Solar Panels on eBay

If you are looking for polycrystalline solar panels on eBay, you may start with a keyword search. You can enter relevant keywords, such as "polycrystalline solar panels", into the search box or look through deals on other products. You can also narrow this down by selecting a category and browsing through those listings.

It is also a good idea to look at some of the other tools eBay provides, such as the 'Ask a question' feature, which allows you to get in touch with the seller. This tool is usually located on the product listing page and allows you to ask anything about the solar panel under consideration, including what it is suitable for and how many you need for your home. Additionally, verifying the seller quality by reviewing feedback provided by previous buyers can go a long way towards ensuring peace of mind when you make a purchase.


Solar energy is becoming a more popular option because it helps consumers save on the energy bill, and it is better for the environment. One of the options available in the market is polycrystalline solar panels, which is a popular choice for homes, even though they are a bit bigger than other types of solar panels. When purchasing solar panels, it is also a good idea to look into the components one might need. Components of solar panels include batteries, power inverters, a charge controller, and DC disconnect. It is also important for the buyer to think about what it takes to install solar panels, including locating them where it is sunny and keeping them away from shade to maximise the output. Cleaning solar panels keeps them performing efficiently for a longer period of time.

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