HJT PV Cells and Components
The amorphous silicon thin film heterojunction cells are deposited amorphous silicon thin films on crystalline silicon. It integrates the advantages of crystalline silicon cells and thin film cells, and integrates many advantages of high efficiency, low light decay, low temperature coefficient, and high low light response, and the technology is subversive.
N-type heterojunction (HJT) cell conversion efficiency reached 26.81%; The recent mass production of P-type HJT batteries has set an innovative world record: 26.58%.
The HJT efficiency is as high as 24.5%, and the temperature coefficient of the component is -0.24% / ℃, which is only about half of PERC(-0.39% / ℃), and high double-sided rate (about 90%), high reliability (no light attenuation), high power generation, low light power generation, etc. The power generation of heterojunction double-sided components is 7% to 16% higher than that of PERC.
Structure Diagram of HJT Batteries
Compared with the power temperature coefficient of -0.34% of PERC battery and -0.30% of TOPCon battery, HJT module has a more stable power temperature coefficient of -0.24%/℃, the attenuation rate of HJT battery for 10 years is less than 3%, and the power generation decline in 25 years is only 8%. The relative power of HJT components is 2.8% higher than TOPCon battery components and 3.5% higher than PERC battery products.
In similar application scenarios, the higher the double-sided rate, the greater the power gain on the back. The double-sided rate of HJT components is about 85%, which is about 15% higher than PERC battery components and 5% higher than TOPCon battery components.
By the end of the 25th year, in terms of product power retention, HJT components were 92%, PERC components were 87.2%, and TOPCon components were 89.4%. This means that the power retention rate of heterojunction products is currently the best throughout the life cycle of the plant.
Over a 25-year life cycle, the combined power generation is at least 5%-10% higher than the PERC
HJT technology products show higher power generation gains, 4.37%-6.54% higher than PERC and 1.25%-3.33% higher than TOPCon. Especially in high temperature regions (such as the Middle East, Australia and the southern United States, etc.), its power generation performance is more prominent, with a 6%+ gain compared to PERC and a 3%+ gain compared to TOPCon.
