CW ENERJI MUH. TIC. VE SAN. A.S., established in 2010, is a leading manufacturer, solution provider and service company in the photovoltaic power generation sector. CW Enerji’s scope of products comprises solar power plant investment and technical consulting, projecting, system design, solar power plant installations, licensing and operation, as well as licensed and unlicensed production regulations for solar power plants projects planning, designing, financing, implementation and general maintenance matters
DARK/Black Once the silicon crystals are manufactured, they are adhered to a backsheet that arranges them into a grid pattern. This backsheet can be seen through the gaps between the cells, and impacts the overall appearance of the panel.
Regardless of actual performance differences, you bring up a great point with regards to service life. If black backed panels do reach slightly higher temperatures on a daily basis compared to white backed panels, will it have a notable effect on longevity? Will they break down at a faster rate? Granted, they are still backed by the standard 25 year / 80% warranty, but could black backing account for some additional degradation? Are black backed panels more readily available because nobody wants them in my region?
“When white backsheets are used, the empty spaces or gaps between and around the solar cells provide a reflection of the unused light and increase the likelihood of ‘light trapping,’ resulting in an increased generation of photocurrent,” said Geoff Atkins, executive advisor of North American panel manufacturer Silfab Solar. “All-black modules have a more aesthetically pleasing look but lose the benefit of reflection and light trapping, resulting in a lower photocurrent — up to 3% less than a white-backsheet module. Three percent less current means about 0.5% lower absolute efficiency.”
Black backsheets create a more uniform look to the solar panel, which helps it blend in with darker roof materials. However, the black color does hold some heat, so black backsheets may get hotter than traditional white backsheets. That said, the tradeoff in efficiency may be worth it for a more visually appealing solar installation.
The TOPCon solar cell structure consists of a thin tunnel oxide layer sandwiched between a transparent conductive oxide (TCO) layer and a p-doped crystalline silicon layer. The TCO layer acts as a front contact for the solar cell, while the p-doped layer acts as the absorber layer. The tunnel oxide layer acts as a passivation layer, preventing the recombination of charge carriers at the surface of the solar cell. Increased efficiency enables the solar panel to capture a greater amount of energy per unit area.
The TOPCon solar cell structure consists of a thin tunnel oxide layer sandwiched between a transparent conductive oxide (TCO) layer and a p-doped crystalline silicon layer. The TCO layer acts as a front contact for the solar cell, while the p-doped layer acts as the absorber layer. The tunnel oxide layer acts as a passivation layer, preventing the recombination of charge carriers at the surface of the solar cell. Increased efficiency enables the solar panel to capture a greater amount of energy per unit area.
Tunnel oxide passivated contact (TOPCon) solar technology is a relatively new type of solar cell technology. TOPCON stands for “Tunnel Oxide Passivated Contact”.
Advantages of TOPCON Solar Panels
The adoption of TOPCon technology has gained popularity due to several benefits associated with it. Here are some of the key advantages of using TOPCon solar cell technology:
-Manufacturing process: TOPCon solar cells can be manufactured with the same machines as P-type solar cells, i.e. manufacturers don't need to make any high capital investment to adopt this technology, making it easier and more cost-effective to produce TOPCon solar panels on a large scale.
-Higher efficiency: TOPCon cells are more efficient in converting sunlight into electricity than P-type cells. The maximum efficiency of TOPCon cells is around 28%, which is higher than the maximum efficiency of about 24% for PERC cells. This higher efficiency results in more electricity generation from a given surface area.
-Lower degradation: TOPCon modules have a lower power degradation during the first year and over the 25 years of use, compared to PERC solar PV modules. Hence, they will maintain their efficiency for a longer time, resulting in a longer lifespan of the solar panels.
-Lower temperature coefficient: The temperature coefficient of TOPCon solar panels is lower than that of PERC solar panels. It means that TOPCon solar panels can maintain their efficiency at higher temperatures, which is particularly important in hot climates.
-Bifaciality rate: TOPCon cells have higher bifaciality than PERC cells. It means that TOPCon solar panels can generate electricity from both the front and the back of the solar panel.
Low light performance: TOPCon solar modules have higher efficiency in low-light conditions than PERC modules. It means that TOPCon solar panels can generate more electricity even when there is not enough sunligh
Disadvantages of TOPCON solar panels
Here are some potential challenges before TOPCon solar cell technology
Cost: TOPCon solar cells can be more expensive to produce than traditional solar cells due to the additional materials and manufacturing steps required to create the thin-film layers needed for the cell.
Complexity: The manufacturing process for TOPCon cells is more complex than for traditional cells, which can make it more difficult to scale up production to meet high demand.
High-temperature processing: The production of TOPCon cells requires high-temperature processing steps, which can lead to increased energy consumption and carbon emissions, as well as the risk of defects or damage to the cell.
Sensitivity to impurities: TOPCon cells are more sensitive to impurities in the materials used to create them, which can lead to reduced efficiency or even complete failure of the cell.
Comparison Between PERC and TOPCon Solar Technology
When compared to a PERC solar cell, a TOPCon solar cell appears visually identical once installed in a module. However, Unlike PERC cells, TOPCon cells are made from n-doped silicon, which is more challenging to manufacture. However, this material allows TOPCon cells to achieve higher degrees of efficiency.
Another significant difference is the more laborious passivation process used for TOPCon cells. Despite being more technically challenging, this process achieves a greater effect. Specifically, applying a layer of polycrystalline silicon to the rear side of the cell requires significant technical effort but allows the solar cell to handle higher voltages, resulting in an increase in overall efficiency.
Applications of TOPCon Solar Panels
Utility-scale solar power plants: TOPCon solar panels are often used in utility-scale solar power plants due to their high efficiency, which allows for more electricity to be generated from a smaller area.
Agriculture and farming: TOPCon solar panels can be used for agricultural applications such as water pumping, irrigation, and crop drying, providing off-grid electricity to remote areas.
Electric vehicle charging stations: TOPCon solar panels can be used to power electric vehicle charging stations, allowing for clean and sustainable transportatio
Advantages of Tommatech/CW Solar Panels and Why to buy
- It is one of Turkey's Top 5 Solar Panel Manufacturers.
-There is a dealer and sales network all over Turkey.-There is a fast and corporate understanding of warranty and service.-It is the most known brand in Turkey.
- It supplies and sells all products in Solar Energy systems such as panels, inverters, batteries, drivers. Offers complete solutions
- Cosmetically and visually, the products are manufactured with great care.-Providing training service, Having personnel with technical grandfather-Having International Certificates
-15 Years Physical Warranty, 30 Years Performance Warranty.-The frame thickness is 40mm, and it is manufactured more durable than many other manufacturers.Disadvantage of Tommatech/CW Solar Panels
- Heat Performance Pmax coefficient is slightly higher than other manufacturers. So the performance drops as it gets hotter.is more -0.36%/ºC
- Their prices are around 20%-30% more expensive than other equivalent manufacturers with the same electrical values, lifetime and warranty.
-Tommatech Solar panel economically have longer amortization periods.
-Selling a product with the perception that it is made in Germany, although it is not a German product.
Moreover, while Turkey has become the world's most important production center with its nearly 60 factories, the unjustified advertisement of Germany does not coincide with our national interests.
-Since sales are not made with a single brand (CW, Tommatech, Suneng, Torges), it is very difficult for the customer to make a choice by making technical comparisons.
-The technical difference between Tommatech and CW is not disclosed and the two are sold at different prices; forcing customers to choose expensive is better in sales marketing.
-We cannot see additional superior features from other brands in datasheets and test reports.
All processes that require high precision in Tommatech's modern production line are carried out with robotic systems.
HandCW solar panels produced without touching, efficiency, longevity and durabilityadvantage in terms of Making domestic production using German technology,
-class quality.There are more than 50 manufacturers in Turkey.
All of them have been in operation for almost the last 5 years.
Almost all of the manufacturers use the same Glass from Şişecam, Cell from China, Back Sheet and EVA from the same product group.
The production processes are the same. There is almost no difference. We share these small differences with you on our site.
-High Conversion Efficiency
-Self-Cleaning and Reflection-Reducing Glass
-High Efficiency in Low Radiation
-Excellent Strength Capacity
-0~+5W Positive Power Tolerance
-Easy setup
-15 Year Product Warranty
-30 Year Performance Guarantee
