25.62% Efficiency For Silicon HJT Cell

Suzhou Maxwell Scores 25.62% Efficiency Using Low Indium & Silver Coated Copper Grid Lines

25.62% Efficiency For Silicon HJT Cell

As HJT solar cell technology becomes mainstream, efforts are on to bring down its costs, and one way to do that is by using less or completely eliminating indium and silver use. Maxwell says it has achieved 25.62% efficiency with less indium and less silver use. (Photo Credit: Suzhou Maxwell Technologies Co, Ltd)

  • Maxwell has claimed 25.62% efficiency for monocrystalline silicon HJT solar cells with 50% less indium and using silver coated copper grid wires
  • Certified by ISFH Germany, the efficiency is the current record high for this kind of cell, according to the Chinese company
  • It believes there is scope for 30% further reduction in the use of indium and also bring down silver use by 55% using the same process it deployed

China’s Suzhou Maxwell Technologies Co, Ltd has reported achieving 25.62% power conversion efficiency for monocrystalline silicon heterojunction (HJT) solar cells, using 50% less indium and silver coated copper grid wires.

Maxwell believes the amount of indium can further come down to 30% from the existing level, while the use of silver using this process can also be reduced by 55%. “The combination of these 2 processes alone will significantly reduce the manufacturing cost of HJT cells,” it added.

The solar cell equipment supplier said it managed this efficiency on a full size M6 274.5cm² cell with the help of transparent conductive oxides (TCO) process deploying magnetron sputtering. The efficiency claim has been certified by the Institute of Solar Energy Hamelin (ISFH), Germany.

The 144 half-cell M6 HJT cell based solar modules developed by Maxwell’s module technology laboratory using this batch of high-efficiency cells have been tested internally – and the power is as high as 491.8W. For reference, a commercially available product based on a similar configuration, i.e. M6 and 144 half cells from Huasun, featured in our Top Modules listing, results in 480 W power rating (see Top Solar Modules Listing — March 2022).

Chinese production equipment maker Maxwell claims the efficiency of 25.62% is currently a record high for this kind of cell which will enable a significant reduction in the manufacturing costs of HJT cells. The reduction of silver and indium is sure to excite the industry as these happen to be 2 of the most expensive elements of a solar cell production process. Recently, LONGi Solar claimed 25.40% efficiency for indium-free HJT cells (see 25.04% Efficiency For Indium-Free HJT).

In March 2022, Maxwell along with Australian metallization technology company SunDrive announced a full area conversion efficiency of 26.07% for a M6 HJT cell using a mass manufacturing process and with no silver (see 26.07% Efficiency Record For HJT Solar Cell).

About The Author

Anu Bhambhani

SENIOR NEWS EDITOR Anu is our solar news whirlwind. At TaiyangNews, she covers everything that is of importance in the world of solar power. In the past 9 years that she has been associated with TaiyangNews, she has covered over thousands of stories, and analysis pieces on markets, technology, financials, and more on a daily basis. She also hosts TaiyangNews Conferences and Webinars. Prior to joining TaiyangNews, Anu reported on sustainability, management, and education for leading print dailies in India. [email protected]

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