Longi solar is the largest manufacturer of monocrystalline silicon, including silicon ingot, wafer, cell and module

1. Better LECOTechnology Roadmap
of Longi-solar product
São Paulo, Brazil
25th~30th Aug 2018
By Walter. Jin
+86-18917365151
jindi@longi-silicon.com

2. www.longigroup.comPage 2
CONTENTS 1. About Longi group
2. About Longi solar
3. Hi-MO1: Mono PERC
4. Hi-MO2: Bifacial PERC
5. Hi-MO3: Half-cut PERC

3. Company profile
About Longi group

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Longi milestones
Feb. 2000
Sep. 2007
Nov. 2009
Apr. 2012
Oct. 2013
Nov. 2014
2017
Ningxia Longi established
1000 ton capacity for ingot
Longi Group founded XiAn Longi established
350MW capacity for wafer
Became to the largest mono
supplier for 1GW wafer delivery
Acquired Lerri for PV cell
and PV module business
IPO on stock market
of Shanghai Exchange
Ingot: 15GW
Wafer: 15GW
Cell: 5.5GW
Module: 6.5GW

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Industry chain
Mono-crystalline Silicon Mono cell Mono module System
Total employee > 18,000

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Industry chain
Silicon
Solar
Energy
Mono ingot Mono wafer
Mono cell Mono module
Mono power system
Established in 2007, for high efficiency
mono solar cells and modules. LERRI
Solar was renamed LONGi Solar in 2017
Established in 2014, mainly engaged in
EPC business and investment for all
kinds of solar system and solar stations
Established in 2000, for high quality ingot
and wafer products to semiconductor
and photovoltaic industry

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Global presence
FACTORY
OVERSEAS FACTORY
SALES NETWORK
INDIA (Under Construction)
MALAYSIA
KOREA
GERMANY
AMERICA
JAPAN
AFRICA
AUSTRALIA
MALAYSIASINGAPORE
INDIA
THE MIDDLE EAST SHANGHAI, CHINA
TAIWAN, CHINA
YINCHUAN, CHINA CHUZHOU, CHINA QUZHOU, CHINAHEFEI, CHINA TAIZHOU, CHINAXIAN, CHINA

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Mono manufacturer
2016 2017 2018
0
5
10
15
20
25
30
Mono ingot Mono wafer
Mono cell Mono module
7.5GW 7.5GW
3GW
5GW
5.5GW
8GW
6.5GW
12GW
15GW
28GW
15GW
28GW

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Manufacturing scale
Global output of mono module
16%
48%
Global output of mono wafer
The Largest
Source: Q1 2017 Global PV Market Outlook -Bloomberg New Energy Finance
Mono-crystalline silicon products manufacturer
Based on the 2016 global installed capacity of Bloomberg statistics Feb 17, 2017
Source: Q1 2017 Global PV Market Outlook -Bloomberg New Energy Finance
No.1
Output of mono modules worldwide

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Financial strength
Revenue (Million USD) Debt ratio
50.0%
44.6%
47.4%
56.7%
2014 2015 2016 2017
992
1,623
3,047
5,226
2014 2015 2016 2017
566
945
1,833
2,602
2014 2015 2016 2017
46 80
224
567
96
186
459
840
2014 2015 2016 2017
Total assets (Million USD) Net & gross profit (Million USD)
2017
+42%
+72% +130%
+57%
Market Capital
>US$ 10.9Billion
as of 3/30/2018

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Financial strength
Major PV module manufacturers issued by PHOTON Consulting, LLC (PV Triathlon Report in Nov, 2017)
Financial Health No. 1 among all PV Manufacturers
1st Quartile 2nd Quartile
3rd Quartile 4th Quartile

12. Company profile
About Longi Solar

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Important clients
Silicon Solar
The annual shipment of Longi solar: 1GW in 2015; 2.3GW in 2016; 4.66GW in 2017

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Technology strength
5-7% 260 460
5-7% of total revenue is
invested in activities of
research and development
R&D investment
Developed 260 patents
on technology of ingot,
wafer, cell and module
Patents acquisition
More than 460 technical staff
working on ingot, wafer, cell,
and module development
Technical forces

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Investment in R&D
Technology strength is realized through consistent investment in R&D,
to develop products with leading performance at lower cost
Expenses for R&D R&D expenses in revenue
AnnualR&DExpense(US$Mil)
R&Dexpense/Revenueratio(%)

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Strategic Partners
Materials University CustomerEquipment
LONGi Solar has established strong strategic partnership with equipment and material suppliers, leading research
institute and university, as well as customers, to advance development on ingot, wafer, cell and module technology

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World record
2017.10 2017.12 2018.04
Efficiency
23.60％
Dec. 2017
Efficiency
23.26％
Oct. 2017
Efficiency
22.71％
Oct. 2017
Power/Efficiency
333.7W/20.41％
Jan. 2018
Module power
360.3W (Half-cut)
Apr. 2018
Mono PERC Cell Bifacial PERC Cell PERC Module
Efficiency
23.68％
(front)
Dec. 2017
Efficiency
22.41％
(front)
Nov. 2017
Bifaciality
82.15％
Nov. 2017
Hi-MO 3

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Green cyclings
Hydraulic generation Photovoltaic generation
Monocrystalline products

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Products offering
Hi-MO 2
Bifacial PERC
Hi-MO 1
Mono PERC
Hi-MO 3
Half-cut PERC

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Technology roadmap
21.10%
21.80%
22.20%
22.40%
22.60%
21.30%
22.10%
22.50%
22.70%
22.80%
20.00%
20.50%
21.00%
21.50%
22.00%
22.50%
23.00%
23.50%
2017 2018 2019 2020 2021
Mono PERC
Bifacial PERC
Cellefficiency(%) Technology roadmap of Longi cell

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Technology roadmap
295
315
340
345 350
305
325
355
360
365
260
280
300
320
340
360
380
2017 2018 2019 2020 2021
Mono PERC
Bifacial PERC
ModulePmax(W) Technology roadmap of Longi 60C module
Half cut
Shingling

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370
385
405
410
415
360
375
395
400
405
330
340
350
360
370
380
390
400
410
420
430
2017 2018 2019 2020 2021
Technology roadmap
Mono PERC
Bifacial PERC
ModulePmax(W) Technology roadmap of Longi 72C module
Half cut
Shingling

23. Mono products
Hi-MO1: Mono PERC

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PERC technology
Ag Contacts ARC SiNX
P-Si
Al2O3
N++
P++Al-BSF
Al lines Back-sheet foil
 21.5%+ average cell efficiency
 Better temperature coefficient
 Excellent low-light performance
 Outstanding LID performance

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PERC technology
Mono PERC Poly Mono
Comparison of light induced degradation(LID) at 60KWh

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Cell efficiency
PERC production cell efficiency average >21.2%;
Efficiency record 23.60% of PERC cell demonstrated through the development of next generation
22.17% 2017.04
22.43% 2017.08
22.71% 2017.10
23.26% 2017.10
23.60% 2017.12
Efficiency record of PERC CellEfficiency distribution in production of PERC Cell
Cellefficiency

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Power record
Power distribution of Longi 60cells PERC module
Power record of module
325.6W
(20.17%)
2017.04
333.7W
(20.41%)
2017.04
334.0W
(20.66%)
2018.05

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Power record
Power record 334W of 60C module demonstrated through the development of next generation
Current(A)
Power(W)
Voltage (V)

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Higher reliability
2018 DNV-GL Module
Reliability Scorecard:
LONGi Solar modules are
Top Performers (to the left of
green lines) for All extended
reliability tests by DNV-GL
DH2000
DML+TC50+HF10
TC600 HF30
PID96(85C/85RH)

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Yield record
LONGi Solar Hi-MO1 module ranked No. 1 in TÜV Rheinland energy yield simulation(All Quality Matters) in 2016 & 2017

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Yield record
Mono PERC Poly winner Simulated yield
1535
989
1924
1752
1617
1513
971
1888
1724
1583
1.45%
1.85%
1.91%
1.62%
2.15%
1.0%
1.5%
2.0%
2.5%
500
1000
1500
2000
Simulatedpoweryield(KWh/KWp/year)
Datong China Cologne Germany Kumamoto Japan Los Angeles USA Chennai India
Simulated yield test by TÜV Rheinland in five cities globally

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Project reference
Project case study 1
Capacity: 3KW
Location: Sanya city, China
Project type: Ground-mounted
Poly design: 8pcs, 260W rated power
Hi-MO1 design: 8pcs, 290W rated power
Data Collected period: Oct. 2016 to Aug. 2017
Sanya city is located in South
of China, near to sea area,
which is quite hot and humid

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Project reference
0
1
2
3
4
5
6
0
1
2
3
4
5
6
10 11 12 1 2 3 4 5 6 7 8 AVG
Mono PERC Poly Increased yield
Monthlyenergyyield(KWh/KWp)
Yieldincreaseratio(%)
 Better temperature coefficient: Mono PERC: -0.38%/C lower than Poly: -0.42%/C
 Lower operation temperature: temperature of Mono PERC is averagely 3% lower
 Better performance at low irradiance: over 40% yield from irradiance blow 600 lux
Average yield +3.93%↑

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Project reference
Mono PERC Poly Rate of increase
Poweroutput(KWh/KWp)
Irradiance (W/m2)
Output comparison under different irradiance in Sanya

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Project referenceTemperatureonsurfaceofmodule(Co)
Data monitoring on temperature of modules
Poly
Mono PERC
Ambient temp.
Average temp. difference 3oC

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Project reference
Project case study 2
Capacity: 4KW
Location: Taizhou city, China
Project type: Ground-mounted
Poly design: 10pcs, 270W rated power
Hi-MO1 design: 4pcs, 355W rated power
Data Collected period: Sep. 2017 to Apr. 2018

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Project reference
Yield comparison between Mono PERC and Poly module in a day
0%
1%
2%
3%
4%
5%
6%
7%
8%
9%
300
400
500
600
700
800
8:00 8:30 9:00 9:30 10:00 10:30 11:00 11:30 12:00 12:30 13:00 13:30 14:00 14:30 15:00 15:30
Poweroutput(Wh/KWp)

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Project reference
0%
1%
2%
3%
4%
5%
6%
7%
0
1
2
3
4
Sep. Oct. Nov. Dec. Jan. Feb. Mar. Apr. AVG
.
Mono PERC Poly Increased yield
Monthlyenergyyield(KWh/KWp)
Yield comparison between Mono PERC and Poly module in a year

39. Mono products
Hi-MO2: Bifacial PERC

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Hi-MO1 & Hi-MO2
Electrode
ARC SiNX
N+Emitter
Rear passivation
Rear Al-BSF
Electrode
ARC SiNX
N+Emitter
Rear passivation
Al fingers
Hi-MO1:
MonoPERC
Hi-MO2:
BifacialPERC

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Bifacial technology
P-type Si
 Bifaciality of Hi-MO2 module >75%
 Significant increase on energy yield
 Degradation warranty up to 30years
Innovation from monofacial to bifacial

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Bifacial features
 Front side efficiency equivalent to conventional PERC
 Manufacturing cost comparable to conventional PERC
 8%-25% more power yield can be gained from back side
 Bifacial is suitable for commercial rooftop, carport, BIPV
Structure of conventional PERC cell Structure of bifacial PERC cell

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Bifacial specialty
Electrical Properties(STC*)—P-PERC Bifacial—predicted data
Item Units Bifacial Gain (72 Type)
0% 5% 10% 15% 20%
Maximum Power(Pmax) [W] 360 378 396 414 432
MPP Voltage(Vmpp) [V] 39.3 39.3 39.3 39.2 39.2
MPP Current(Impp) [A] 9.16 9.62 10.08 10.53 10.99
Open Circuit Voltage(Voc) [V] 48.2 48.2 48.2 48.3 48.3
Short Circuit Current(Isc) [A] 9.72 10.21 10.69 11.18 11.66
Module Efficiency [%] 18.25 19.17 20.08 20.99 21.91

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Better warranty
30 years warranty for extra lineal power output

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Bifacial specialty
Mono-facial module Bi-facial module
Direct sunlight Direct sunlight + Reflection + Scattered light

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Bifacial specialty
NO. Ground Reflection
1 Reflect material 85%
2 Snow land 70%
3 Concrete or sand 30%
4 Grass or clay 15%
Reflection ratio on various lands
1
2
3 4

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Project reference
Project case study 3
Capacity: 18KW
Location: Pucheng city, China
Project type: Ground fixed (15 degree)
Std. mono design: 18.25KW
Hi-MO2 design: 18.90KW
Data Collected period: May. 2017 to Aug. 2017

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Project reference
• Data collected from the project with capacity of 18.9kw in Pucheng, Shaanxi, China
• Configuration of fixed tilt: slope angle is 15 degree and distance to ground is 1.6m
• Power yield on fixed tilt from HiMO2 is 11.27% higher than standard mono module
+11.27%
Hi-MO2 Std. Mono Energy yield Average
Comparison of energy yield with fixed mounting system
Dailyenergyyield(KWh/KWp)

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Project reference
Project case study 4
Capacity: 336KW
Location: Kubuqi Desert, China
Project type: Single axis tracker
Poly design: 336kw on tracker
Hi-MO2 design: 336kw on tracker
Data Collected period: July. 2017 to Nov. 2017

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Project reference
Comparison of energy yield with tracking mounting system
• Data collected from the demo project with HiMO2 (336kw on single axis tracker) in Inner Mongolia, China
• Power yield from HiMO2+tracker is 27.3% higher than poly+fixed tilt and 14.3% higher than poly+tracker
Dailyenergyyield(KWh/KWp)
GainofBifacialmodule(%)
Bifacial+tracker Poly+tracker Poly+fixed Bifacial gain

51. Mono products
Hi-MO3: Half-cut PERC

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Higher power
+5~10W
 1
The half cut cell reduces the working
current by half, and thus reduces the
resistive loss of the module effectively
 1
The power of the module increases 5-
10W; Front side power is 320W for 60C
type of module and 380W for type 72C

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When there is shading
 1
The module with half-cut cells always
shows greater energy efficiency than the
module with whole cells under shading

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Lower temperature
Temperature
of module 2
Temperature
of module 1
Temperature
of ambience
 1
Under the same irradiance, the
current in Hi-MO3 is only half of
the whole cell module, thus the
temperature of module is lower
 1
The lower module temperature
can improve performance also
can slow aging of the material,
so it will reduce risk of failures

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Lower hot-spot impact
 1
Comparing with the whole cell module,
the half-cut cell module shows higher
power and the temperature of hot-spot
will be relatively much lower (10-12 ℃)
 1
Under the same irradiation, on the
semi-cut cells, the power density will
be lower with a better heat dissipation
Module1 of
whole cells
Module2 of
whole cells
Module of
Hi-MO3
Temperature of hot-spot

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Higher energy yield
1200
1300
1400
1500
1600
1700
1800
1900
2000
10-15%
Improvement
10-15%
Improvement
2-4%
Improvement
The tracker +
Bifacial PERC
The tracker +
MONO PERC
MONO PERCPoly
Annualenergyyield(KWh/KWp)
Higher energy yield with Mono PERC and Bifacial PERC

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Reliability creates value
Mono PERC (including Bifacial PERC)
is the best solution to realize lower LCOE

58. THANKS!
By Walter. Jin
+86-18917365151
jindi@longi-silicon.com