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What Is The Difference Between TOPCon, HPBC, HJT, PERC?

Views: 10188     Author: Site Editor     Publish Time: 11-16-2023      Origin: Site

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The differences between TOPCON, HPBC, HJT, and PERC PV Module mainly lie in Solar cell technology, conversion efficiency, process complexity, and cost.

1. Solar Cell technology:

TOPCON is a Solar cell technology based on N-type silicon wafers. It utilizes a thin tunnel oxide layer and highly doped polycrystalline silicon film in the metal electrode contact region to form a passivated contact structure, thereby improving power generation efficiency.

HPBC is an independently developed cell technology based on N-type silicon wafers by Longi Green Energy Technology Co., Ltd. It adopts high-temperature processes and has a relatively high conversion efficiency.

HJT is a heterojunction solar cell that mainly involves changing the positive N-type crystalline silicon layer to amorphous silicon and using N-type silicon wafers and amorphous silicon to form a PN junction, reducing recombination losses at the PN junction.

PERC is emitter passivation and back contact cell that uses oxide local passivation technology to increase the limit efficiency to around 23%.

2. Conversion Efficiency:

The theoretical limit of TOPCON is relatively high and has significant room for improvement. 

Currently, the conversion efficiency of TOPCON has reached around 25%.

The conversion efficiency of HPBC is over 25%.

The conversion efficiency of HJT is slightly higher than that of PERC batteries, up to 24.5%.

The conversion efficiency of PERC is generally around 23%.

3. Process complexity:

The process flow of TOPCON is three steps more than PERC, with a total of 12 processes.

The process flow of HPBC is similar to that of PERC but includes high-temperature processes.

The process flow of HJT  is relatively simple with only seven processes.

4. Cost:

Due to the complex process and difficulty in mass production, the cost of TOPCON is similar to that of PERC.

HPBC has a relatively low cost mainly benefiting from its high-temperature processes and mature production processes.

The cost of HJT is relatively high due to its low-temperature processes and high equipment requirements.

5. Related PV Modules: Click on different models to learn more.


CanadianSolar: CS6W 550-560W  |  CS7N 660-675MS  |  CS6L 455-465MS

LONGILR5-72HPH 550-560M  |  LR5-72HBD-545-555M

JA SolarJAM72S30 550-555MR  |  JAM72S20 460-465/MR  |  JAM78S30 570-610/GR  |  JAM72D30 560-580/LB

Jinko SolarJKM 550-560M-72HL4-V  |  JKM 545-555M-72HL4-BDVP


LONGILR5-72HTH 575-590M  |  LR5-54HTH 420-455M  |  LR5-54HTB 430-450M Black  |  LR5-72HTH 580-600M(Anti-dust)


Jinko SolarJKM 440-450M-54HL4R-B  |  JKM 580-590N-72HL4-V  |  JKM 580-590N-72HL4-BDV

CanadianSolar:  CS6W 575-585T  |  CS6.1 605-620-72TD  |  CS7N 680-700TB-AG  |  CS6R 440-445T

JA SolarJAM72D40 550-580/MB


CanadianSolarCS6R 425-440H-AG 

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