20211229 huasun hjt technical presentation 2021v4211220

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© 2021 安徽华晟新能源科技有限公司版权所有 1
HJT Technical Presentation 2021
Anhui Huasun Energy Co., Ltd.

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Introduction of HJT
Huasun-HJT Solar Technology Pioneer in China

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(n) c-Si
Ag电极
Ag电极
TCO
(i) a-Si:H
(n) a-Si:H
(p) a-Si:H
BRIEF INTRODUCTION OF SILICON HJT CELLS
Hetero Junction with Intrinsic Thin-Layer (short name as HJT or
HIT) solar cells are based on N-type silicon wafer，with two
different layers which are Silicon based film and TCO film, this is
the key for the HJT solar cell.
Ø 28.5% Theoretical efficiency，25.5% Massive production potential;
Ø A better P-N structure compared to normal solar cell;
Ø Optimized passivation structure, longer lifetime of minority carrier;
Ø Low Temp(250 dec)& Low Energy Consumption processing, suitable
for thinner wafer.
Tandem Cell is an update for the thin-film Cell industry：
Equipment land Covering ~3.2%
Equipment invest CAPEX ~13%
Efficiency improvement 5%, Module cost reduction 15.2%
Ø 42.5% Theoretical efficiency, 30%+ Massive production potential;
Ø 15%+ per watt Cost reduction;
Ø Compatible with current HJT production line;
Ø Industrialized in 2025.
A PV Cell Technology Platform

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Wafer
Technology
Roadmap
Cell
Efficiency
Technology & Difficulty
& Compatibility of current
Equipment
Cost of
Equipment
Difficulty
Production
Process
Mass
Production
Status in China
P-type
Upgrade
PERC
24.03
PERC + SE
Compatible, easy to remodel
Low
Monofacial：lower difficulty，
less process
Bifacial：hard
10+
Mass production
in common
N-type
high
efficiency
HJT 26.3 Partially compatible High
Less process,
Two sides are symmetrical.
Thin-film technology
4
1.8GW at present,
plan. Over 29GW
in the plan
IBC 25+ Partially compatible Very high
Difficult, the technology itself
no module equipment
20+
200MW at the
moment
TOPCON 25.21
Compatible with N-PERT
production line if 3~5 processes
are added
High hard 12
More in the
future by
updating PERC
N-PERT 23.5+ Partial compatibility with PERC Low less production process ， 10+
1~2GW at
present
eliminate soon
Tandem
( future )
29.4
Project：HJT+IBC = HBC
HJT + perovskite = layer-built
combination of
two
technologies
Currently very high 25+
Technology Comparison
BRIEF INTRODUCTION OF SILICON HJT CELLS

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Cleaning
texturing
Bifacial
CVD
Bifacial
PVD
Screen
printing
& Sinter
(firing)
Testing
ADVANTAGES OF HJT TECHNOLOGY
Normal cell production has more than 10 processes, HJT cell has only 4 processes.
1-Simple Production Process

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PERC, as a mature cell technology, has
already reached the efficiency limit of 24%
Limited for higher efficiency, and no
clear direction to improve.
Just started the massive industrialization. HJT
initial efficiency is already beyond PERC,
massive production efficiency is over 25%
The follow-up path to improve the
efficiency is clear, huge potential
available.
PERC：
22-23%
HJT
24%-25.5%
2-High Starting Point of Mass Production Efficiency

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Temperature
coefficient:
-0.26%/℃
HJT solar panels
generate about 4%
more electricity than
PERC panels in a hot
climate.
Products
Temperature
coefficient
%/℃
Maximum
power 500W,
the efficiency
loss under 65℃
Efficiency
loss in a hot
climate
Silicon
Normal
-0.45 90.0W 18.0%
Silicon
PERC
-0.35 76.0W 15.2%
HJT -0.26 52.0W 10.4%
3-Stable Electrical Performance, Low Degradation

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HJT power station ground
conditions
Power gain
(Compared to
silicon module A)
Power gain
(Compared to
silicon module B)
Asphalt pavement 13.3% 14.0%
Cement pavement 12.9% 14.4%
Grassland 15.4% 16.7%
White stone ground 20.9% 24.5%
Back reflection(mirror) 33.3% 35.7%
HJT solar cell is a natural bifacial structure, which is much easier to be produced as a bifacial cell.
The bifacial structure also provides a more stable color. Same color of front and rear side.
4- High Bifaciality
In the actual measurement, the rear side output of Huasun HJT bifacial module can reach more than 30%

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Normal Silicon Module
• To ensure the absorption of light, wafer thickness cannot be
thinner than 180um.
• The wafer and Al-BSF(back surface field) with different co-
efficiency thickness can’t be changed, so micro-cracking
can happen.
• Defects happen when produced with thinner wafer under
800-900℃ .
HJT Module
• HJT cell can be produced with thin wafer, to save wafer
cost and reduce module price
• HJT cell processing temperature is lower than 250℃,
resulting in less cracks or defects
• The mature HJT technology is fine with 100um wafer
• Shingled and zero busbar technology can be applied
Application on both
PV projects and
mobile power.
5-Thinner Wafer Ensures Lower Cost，More Applications

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ADVANTAGES OF HJT SOLAR PANEL
Conclusion:
Ø HJT Bifacial yield is 7-8% higher than PERC Bifacial yield.
Ø HJT Bifacial yield is 14-16% higher than PERC glass-backsheet sturcture yield.
0.08
0.088
0.095
0.126
0.074
0.081
0.088
0.113
0.068
0.073
0.081
0.107
0.00%
2.00%
4.00%
6.00%
8.00%
10.00%
12.00%
14.00%
16.00%
18.00%
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
May June July Augest
Power Generation Compared on a Kwh/W Basis
HJT Bifacial PERC Bifacial
PERC Glass-backsheet HJT-PERC bifacial yield
HJT-PERC Glass-backsheet yield
SYSTEM:3.3KW * 3
Location：Zhejiang Province
In order to prove the performance in a real application,
there are HJT installations with PERC solar panels
installed under the same environmental conditions.
Higher Power Generation- Case 1

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Higher Power Generation- Case 2
6PCS of HuaSun 450W HJT bifacial
Versus
6PCS of 450W PERC bifacial
Time of Installation: July, 2021
Temperature of Installation: 45~55℃
Data analysis:
Ø Inverter output Max：2510W vs 2397W（+5.5%）
Ø HJT Bifacial vs Perc Bifacial (during test date)：
Power gain 8~10%, 450W HJT Bifacial module equals to 495W Perc
bifacial
Ø HJT Bifacial vs Perc Monofacial：
Power gain +20%，450W HJT Bifacial equal to 540W Perc monofacial

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Advantages in power production
Bifacial
Efficiency
Temperature
Coeffiecient
Weak Light
Performance
LCOE
Low
Attenuation
NO PID
NO LID
High Reliability
There is no LID caused by the B-O effect and the
use of TCO film is the best anti-PID, ensuring
long-term durability and profitability.
Low attenuation rate
HJT solar cell attenuate 1%-2% in the first year, and then
attenuate 0.375% annually, which is much lower than
PERC's attenuation of 2% in the first year and 0.45% in
subsequent years.
HJT solar cell full life cycle per W is about 1.9%-2.9%
higher than the bifacial PERC solar cell.
Optimal LCOE
The most promising technology
for the reduction of the LCOE.
Weak light generates high power
HJT solar cell uses N-type monocrystalline silicon wafers,
while PERC solar cell uses P-type monocrystalline silicon
wafers.
HJT solar cell generates about 0.5-1.0% more electricity
per W than double-sided PERC cells.
93%-95% Bifacial Efficiency
Considering the 10%-20% backside irradiation and
the difference in the bifacial rate of the cell, the
power generation per watt of the HJT solar cell is
about 2%-4% higher than that of the bifacial PERC
cell.
-0.26%/℃
HJT solar cell temperature coefficient -0.26%/℃,
about 0.13%/℃ advantage;
HJT's power generation per W is about 0.6~3.9%
higher than Bifacial PERC.

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Key Figures Of HuaSun

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Our R&D Team achieved
an HJT solar cell world
record in M6 size wafers of
a 25.26% efficiency in July,
2021.
CELL EFFICIENCY
25.26%
The potential of HJT is the
ability to increase the
efficiency based on HJT with
other technology such as
Perovskite tandem which is
also in our R&D pipeline
TARGET EFFICIENCY
30%
HJT technology development requires
not only investment, but also a high
level of intelligence for R&D
INDUSTRY TOP TALENT
70+
Planning for a much bigger
playing field as the HJT
market will grow significantly
in the next 5 years. Huasun’s
planned capacity will reach
2.5GW in 1 year, and 20GW
in 5 years
IN THE PIPELINE
20GW
Key Figures Of HuaSun
A brief data overview to understand our company

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Better Product
Better Warranty
15 years product warranty.
30 years performance warranty.
(Output Power Reduction ≤12% in 30 years
Output Power Reduction ≤10% in 25 years)
KEY FIGURES OF HUASUN

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HuaSun M6 HJT Record-25.26%
Certified HJT cell efficiency record 25.26% by Institut für
Solarenergieforschung in Hameln ( ISFH ) on 2nd July 2021, with
M6 size cell, Currently the world record.
The R&D team of Huasun in only a few months after the start of
production improved the HJT solar cell efficiency. Including several
major milestone being achieved in the development of N-type
heterojunction cell technology.
The next stage of cell efficiency improvement is to introduce doped
microcrystalline silicon or doped microcrystalline oxidation
(carbonization) silicon instead of the current technology, to improve
the doping density, light performance, meanwhile reducing the
doping layer resistance, and finally increase the current density of
HJT solar cell.

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2025
Solar
panel
technology
roadmap
Cell
technology
roadmap
Annealing process
Amorphous composite
film technology
TCO optimization
process technology
High-precision printing
technology with low
silver consumption
2021 2022 2023 2024
HJT + Perovskite
High-reliability
encapsulation
technology
Curved encapsulation
technology
Flexible encapsulation
technology
Super MBB and zero busbar
soldering technology
475W
Cell efficiency:
24.5%
Cell efficiency:
24.7-24.9%
Cell efficiency:
25.2%
Cell efficiency:
25.5%
Cell efficiency: 28%
Solar panel：800W+
Perovskite
700W
720W
730W
Roadmap

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5 Years Development Program
2021
• 500MW production capacity
reaches 100%
• 24.3~24.5% average efficiency of
the mass production;
• Start second 2 GW factory in Q2
2025
• 10.5GW production reaches full
capacity
• 25.5+% average efficiency of the
mass production;
• 100 MW laminated cell pilot line into
mass production, and the average
cell efficiency reaches 28%;
2024
• 8GW production capacity reaches
70%
• 25.5% average efficiency of the
mass production;
• The process verification of the
210mm laminated cell is completed;
2022
• 2GW production capacity reaches 90%
• 24.9% average efficiency of the mass
production;25.5% efficiency of HJT cell
R&D;
• Manufacturing cost reaches PERC
Over 10GW capacity planning, 1.5+ billion USD of revenue, market value of 3.1 billion USD.
2020
• 500MW HJT cell and
panel factory starts
• Established Solar Energy
Research Institute;

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20GW HJT Solar Park in XuanCheng Anhui

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2 3
1
There is still potential for huge
efficiency improvements and cost
reduction by HJT.
Efficiency & Cost Potentials
HJT is the best platform for other
Solar technologies, like big wafer
Smartwire, perovskite cell, as more
innovation takes place
A Platform
Higher power generation performance and
better LCOE makes HJT the trend of
photovoltaic power generation.
Better LCOE/Performance
Ø HJT is superior to the existing PERC in terms of efficiency, performance, and will currently be a breakthrough
trend in the solar energy industry. Huasun will strive to become a pioneer in the HJT industry, and work with
the industrial partners to bring higher efficiency HJT solar modules. Huasun will soon mass-produce to
reduce the total cost of HJT products, equipment and materials.
Ø We believe HJT is a platform based on which we are able to combine with other technologies that help to
continuously improve the solar cell efficiency and bring down the cost of solar products.
The Next Era in PV Industry
How HJT can be the Mainstream Technology in the Solar Industry

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Portfolio of Products

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Industry rooftop installation for a high energy
consumption Semi-conductive product factory,
2.5MW installed with 465W HuaSun HJT
solar module.
China
2.5MW C&I Rooftop Installation
Part of 100MW coastal installation PV project,
used 14MW with HuaSun Bifacial HJT solar
module 465W.
ShanDong China
14MW Mounted Coastal Installation
Applied with Huasun Himalaya Hi-Bifi Black
375W Black HJT module for a rooftop
installation in Germany
Germany
Residential Rooftop
Projects list 2021
HuaSun HJT in all applications

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The Himalaya
Series
HJT PV Module

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Himalaya Bifi
Himalaya Hi-Bifi
·M6-72 cells reach 470W
·The highest module efficiency can reach 21.62%
·Cell bifaciality of Himalaya Hi-Bifi series reaches 90%
·15 years of workmanship，30 years output reach 88%

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Himalaya Standard
·Maximum power of M6-78 cells reaches 510W
·Max module efficiency reaches 21. 95%
·Industry-leading temperture coefficient -0.26%/°C
·Combines the best of crystalline and thin-film
technologies, excellent low light performance

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Himalaya Bifi Black
· Maximum power of M6-60 cells reaches 390W
· Max module efficiency reaches 21. 4%
· Suitable for rooftop projects
· Rear side provides additional output, there is no
color difference with backsheet

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CONTACT US
WWW.HUASUN.NET
No.411-C3 Greenland Building,
Yuhuatai District, Nanjing City,
Jiangsu, China.
MARKETING CENTER OFFICE
No.99 Qingliu Road, Xuancheng
Economic Development Zone,
Xuancheng, Anhui, China
FACTORY
0086-025-8621 6170
0086-13921109287
Sales@huasun.net

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