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Home News HJT vs PERC Famous Scene----Why Greystone Heterojunction HJT bi-facial dual glass modules popular out the loop?

HJT vs PERC Famous Scene----Why Greystone Heterojunction HJT bi-facial dual glass modules popular out the loop?

  • March 23, 2022

HJT vs PERC Famous Scene---Why Greystone Heterojunction HJT bi-facial dual glass modules popular out the loop?


HJT vs PERC


  • Higher Power Generation

Greystone 470W HJT bi-facial dual glass heterojunction module with high conversion efficiency, high rate of dual glass, great low light performance, low attenuation, no PID, no LID, low temperature coefficient.

  • Higher Conversion Efficiency

The conversion efficiency of the HJT component of Greystone 470W heterojunction reaches 21.63%, compared with 20.9% for 540W conventional mono-crystalline.

High efficiency heterojunction PV modules in a limited installation area can increase our installed capacity and reduce BOS costs;


  • Higher Reliability

From the point of view of mechanical load, based on the design of 2+2mm dual glass structure, the size of the component does not exceed the limit, and it is not easy to appear frame damage, glass burst, a large number of hidden cracks caused by the component attenuation is too high.

Greystone 470W product is a 166mm heterojunction battery pack with 144 and half pieces, and the size is only 2094×1038×30mm. The product design is mature and has been tested by the market for a long time. Compared with large size components, it is more effective in resisting wind load and snow pressure. Therefore, we provide up to 15 years of material and process warranty, within 15 years of product quality problems directly free replacement.


  • Lower Attenuation

Greystone HJT battery has low attenuation, only about 60% of the annual attenuation of PERC, so customers can get more power generation.

Our HJT heterojunction 470W solar panels can ensure more than 90% power generation after 30 years, that is, the power generation after 30% years is 420W, and the power generation within 30 years is much higher than the ordinary mono-crystalline.


  • Low Temperature Coefficient

Greystone HJT module generates more power at high temperature than conventional PERC batteries, When the operating temperature increase by 1℃ compared with the standard temperature, the output power of the conventional module decreases by about 0.35%, while the power loss of the HJT battery module is 0.24%.

-0.24% low temperature coefficient, compared with conventional PERC, the power generation per watt is 2%-3.9% higher.


  • Up to 90%+ Bi-facial Rate

Ordinary mono-crystalline PERC bi-facial components back power generation only 65% of the front, and 470W heterojunction components back can have more than 90% and at least 423W back power generation, bi-facial superposition after higher power generation.


  • Lower Cost of Electricity

At present, compared with PERC mono-crystalline technology, our heterojunction technology is more advanced, achieving the lowest LCOE cost per kilowatt hour of electricity , faster return cycle and the largest profit. HJT module is suitable for PV on-grid inverters and PV tracking supports used by the mainstream in China.


  • Better value for money

With the large-scale development of heterojunction, whether it is silicon wafer, or the use of super many main gate technology tu reduce the amount of silver paste, cost reduction and efficiency, the heterojunction solar PV modules will leapfrog on the current market PERC PV modules dimension reduction blow, fully occupy the PV application market!

FOTOVO solar has become synonymous with high performing, top quality photovoltaic modules and specializes in PV technology innovation, application and system development. The company is a key component supplier,system integrator and project developer..

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