Roof Solar Panels
The sun’s radiation is an endless supply of energy that can’t be depleted. Fortunately, scientists have already devised a method of harnessing the power of the sun in order to turn it into usable, abundant, and environmentally friendly energy sources. As the most advantageous alternative to fossil fuels because to its quantity, renewability, and advantages, it is expected to play a significant part in the future of the global energy market.
Contrary to popular belief, large-scale solar power plants are not required to capture the sun’s energy for human use. It is possible to capture the power of the sun and convert it into electricity by installing roof solar panels. When photons, or solar-generated energy, strike the rooftop solar panel, the solar panel turns the photons into electrons, which are then converted into direct current (DC) power.
Direct current power is capable of flowing out to electrical safety devices and other equipment. Rooftop solar panels are also equipped with inverters, which convert direct current power into alternating current (AC), which is utilized by a wide range of gadgets and household appliances, including computers, televisions, and even washing machines and dryers.
Solar Power Harnessing System
In order to harness the sun’s rays and turn them into electricity, rooftop solar panels rely on solar cells.
Silicon is a conductor and is therefore used to make this little, square semiconductor. Electrons are liberated when sunlight strikes solar cells, causing chemical reactions that release them. Photovoltaic cells, the most common type of solar cell found on rooftop solar panels, are also common in small electronics like calculators.Silicon crystals, which make up the majority of the semiconductor layers in a solar cell, are critical. For the bottom layer, boron binds with silicon to provide the positive charge needed for photovoltaic cells.
When phosphorus is added to the top layer, it creates a negative charge. The electric field is generated by the movement of the P-N junction, a surface between the two layers.
When sunlight strikes the cells, photons dislodge the electrons from both layers of the cell’s membrane. Due to the fact that the two layers have diametrically opposed charges, the flow of electron occurs. The electric field at the P-N junction, on the other hand, restricts the passage of energy to any other location; hence, an external circuit is required to provide a channel for the electrons to move.
Types of Photovoltaic Cells
The vast majority of photovoltaic cell systems are comprised of tiny square cells with an average size of four inches. Individual solar cells generate very little electricity, which is why rooftop solar panels are typically sold in groups of PV cells known as modules, which are then enclosed in plastic or glass to protect them from the elements during installation. The three primary types of solar cells that are utilized in rooftop solar panels are listed below.
Single-crystal cells: Long cylinders of these sorts of solar cells are produced, and the wafers are sliced into hexagonal or spherical shapes. Due to the high efficiency of the cells produced by this form of solar cell, they are more expensive than the other varieties of photovoltaic cells available. Installing them can improve the energy efficiency of your house by as much as 30%, depending on the model. This particular form of solar cell accounts for 29% of the worldwide market share.
Polycrystalline cells:These are created from molten silicon ingots that are moulded into squares and then cut into smaller squares by hand. Although the cost of manufacturing this solar cell is cheaper than that of single-crystal cells, its efficiency is as much as 15% lower than that of single-crystal cells. They may be placed closely together to improve energy output because the squares are tiny and can be simply stacked one on top of the other.
Amorphous silicon:Due to the fact that silicon is sprayed on the glass or metal surface in thin sheets, this form of solar cell is the least expensive to manufacture of the three types of solar cells discussed above. However, it results in a relatively poor efficiency of around 5 percent.
Mono PERC Solar Panels
Monocrystalline cells (Mono) are silicon cells that are made from a single crystal of silicon. These devices feature great efficiency, improved low light performance, and an extended life span since they are constructed from high grade silicon crystals. Polycrystalline (Poly) silicon crystals are formed by melting numerous silicon crystals together, as the name indicates. They are simple to make, cost-effective, and result in less waste than other options on the market.
However, fast improvements in cell manufacturing techniques are beginning to erode the economic advantage that poly modules formerly held over their mono counterparts in terms of production costs. At the end of 2018, monocrystalline PV cells accounted for 50% of worldwide PV cell manufacturing. There are additional cell advancements, such as bifacial and thin film technology. The former, on the other hand, is relatively new, while the latter is inefficient when used in household applications.
PERC is a new technology that is now accessible in the form of Mono and Polycells, among other configurations. Solar cells are traditionally constructed with an emitter layer on the front surface and a black coating on the back surface. Passivated Emitter and Back Cell (PERC) technology, on the other hand, makes use of a dielectric passivation coating on the rear surface of the cells. Accordingly, the front surface of photoelectric conversion (PERC) cells absorbs sunlight, but the back surface absorbs scattered or reflected light.
Their light absorption and internal reflectivity are greater than those of their traditional equivalents, resulting in higher generation than their traditional counterparts. In the long run, these two variables provide several advantages to end users, particularly residential consumers.
PERC modules have two significant highlights!
- Better flexibility–offers end-users with greater tilt and positioning choices without losing efficiency – particularly useful for residential consumers who have limited roof space.
- Higher energy density–The reduction in levelized energy costs results in shorter payback times.
Mono PERC Panels
When we combine two of the greatest technologies available on the market, we may achieve even better energy efficiency of up to 22 percent, which justifies the significant initial outlay required for a retail solar power system installation. It is possible to achieve the specified energy production with a smaller number of panels. Because of their remarkable low-light and high-temperature performance, they provide greater installation and mounting options.
It is possible that mono PERC will not be suited for all sorts of solar installations. They are, however, particularly well-suited for residential rooftop installations, where faster return on investment and cheaper installation costs are the primary motivating drivers. Mono PERC solar panels are becoming increasingly popular as the need for high-efficiency panels continues to grow, forcing customers to make the switch