Topcon Solar Panel Models
P-type and N-type solar cells are produced from a silicon wafer. TOPCon technology is also a product of N-type solar cell technology. In order to improve electricity production, silicon wafer is produced with chemical additives; the difference between P-type and N-type comes from the material used for the additive. While boron is used for P-type cells, phosphorus is the additive in N-type cells. While boron can be degraded by oxygen, this is not the case for phosphorus. In addition, phosphorus additive increases efficiency by adding free electrons to the wafer. These properties of phosphorus make N-type cells more advantageous. In this article, we will provide information about TOPCon solar panel types and also seek answers to the question of why should I choose a TOPCon solar panel
What is a TOPCon Panel?
The term TOPCon stands for “Tunnel Oxide Passivated Contact”. N-TOPCon solar cells are a type of phosphorus-doped solar cell made from a special type of silicon wafer that gives off more electrons than regular silicon. There are 2 main types of solar cells: P-type and N-type. N-type cells, like TOPCon, perform better at high temperatures and exhibit less degradation over time. They also perform better in low light conditions than P-type cells.
In TOPCon technology, thin layers of silicon oxide and doped polysilicon are added between the base layer and the metal electrodes. The silicon oxide layer helps the electrons move. The polysilicon layer increases conductivity.
What are the Advantages of Topcon Technology
Some of the advantages offered by TOPCon technology are as follows. These advantages are also the answer to the question of why should I choose TOPCon solar panels?
- TOPCon modules can be produced on the same machines that produce P-type modules. In this way, manufacturers do not need to make high capital investments.
- TOPCon cells provide higher cell and module efficiency than P-type cells by converting more sunlight. While the efficiency of TOPCon cells can reach up to 28%, this rate is around 24% in PERC cells.
- TOPCon modules have lower power degradation power compared to PERC panels during the 1st year and over the 30-year use of PV panels.
- Temperature coefficient is the percentage of power output lost by a solar panel for each degree of temperature increase. It affects the power production of PV modules in hot conditions.
- TOPCon cells are more resistant to high temperatures, which makes TOPCon modules more efficient than PERC modules in hot climates.
- TOPCon cells have a higher power increase in double-sided modules than PERC cells.
- TOPCon modules have higher efficiency in low-light conditions, which extends the daytime power generation time and improves the performance of the installation over time.
What are the Disadvantages of Topcon Technology?
Although it has many advantages over PERC cells, TOPCon technology also has some disadvantages:
- One of the most important problems of TOPCon cells compared to PERC cells is that they require a higher amount of silver (Ag) for production.
- Both TOPCon and PERC use silver paste during production. However, TOPCon uses silver paste on both sides of the cells. This means that the costs will never be lower than PERC.
- Due to the higher silver usage, TOPCon cells are generally more expensive to produce, which increases marketing costs.
- TOPCon technology may require some special manufacturing processes other than silver usage. This can increase manufacturing costs.
Some technical problems such as boron accumulation, meeting different requirements for clean room conditions, and the inability to apply the existing selective emitter to the TOPCon front emitter can also make the development and adoption of TOPCon technology difficult.
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High Efficiency TOPCON cell with ZERO LID and Half-cut Technology Big Size: Cell 182mm × 91mm Monocrystalline
| Power Range | 605 – 625 W. |
| Module Efficiency | 22.4 % |
| Product Warranty | 12 Years |
| Power Output Warranty | 30 Years |
| Power Tolerance | 0 ~ + 5W |
| Module Size | 2464mm × 1134mm × 30mm |
