technology trend of pv module...2021/02/05 · 7 longi confidential technology trend of pv module...

Technology Trend of PV Module

LONGi Solar @ 2020

CONTENTS

1. Technology Trend of PV Module

2. LONGi Product Portfolio

3. Advantages of LONGi Product

LONGi Solar @ 2020

1. Technology Trend of PV Module

LONGi Confidential 4

18%23%

27%

56%

68%

90%

2015 2016 2017 2018 2019 2020E

Market share of monocrystalline-Si modules


MonocrystallineRCz

DW slicing

Wafer quality improve

PERCHigh efficiency &

Low degradation

Bifacial PERCSignificant energy yield

increase to lower LCOE

Half-cutIncreasing of efficiency

and power

M6 standard waferGlobal best sell, full

sense replacement of

M2 module

M10 ultimate sizeDesign for ultra large station,

increasing module efficiency

by smart soldering

⚫ Consistent investment in R&D enables LONGi to develop products with better performance at lower cost, and to

deliver products with better BOS savings and improved energy yield, helping customers to realize lower LCOE

90%


Technology Trend of PV Module ⚫ High efficiency

LONGi started mass production of PERC cells and modules in 2016, which led to industry wide adoption of mono PERC.

LONGi’s research, development and production efficiency of PERC cells has always maintained a leading position, and

currently maintains a 24.06% PERC cell efficiency record.

19.8%

20.8%

21.3%

21.8%

22.2%

22.8%

23.2%

18.0% 19.0% 20.0% 21.0% 22.0% 23.0% 24.0%

2015

2016

2017

2018

2019

2020

2021

Efficiency evolution of LONGi monocrystalline-Si cell

24.06%

PERC efficiency record, 2019.01


• 2 / 2mm glass to avoid excessive

module weight

• Take the lead in using white grid

rear glass, with better module

energy yield capacity

• Dual glass with frame can avoid

the damage during installation

and long-term application

• No C-face design for short-

side frame, reducing shading

problem

⚫ The bifacial PERC cell is to adjust the rear aluminum electrode of PERC cell to localized aluminum bus bar.

⚫ LONGi launched the bifacial and dual glass module based on the bifacial PERC cell in May 2017, well ahead of competition.

Since then, LONGi has continued to promote the bifacial module to increase its global market share. LONGi’s total shipment of

bifacial module has reached 10GW (2017.5-2020.11)

⚫ LONGi’s bifacial module used 2+2 mm dual glass to reduce module weight and POE encapsulation to increase reliability. The

adoption of a frame avoided damage to the module during installation and long-term use, with the design of a short frame

without the C-side reduced shading on the cell’s rear side, enhancing energy yield.

ARC SiNx

Electrode

N+ emitter

Rear passivation

Al fingers

P-type Si

Technology Trend of PV Module Bifacial Technology

LONGi Confidential7

Technology Trend of PV Module 166 Optimal size for existing capacity

⚫ In the second half of 2018，157.4、157.8、158.75、161.7mm spec mono wafer emerged.

⚫ M6 spec is based on the analysis of current cell, module compatibility and reform cost, the supply of glass is

also considered.

⚫ The M6 product is suitable for residential rooftop, C&I, utility-scale power plants.

⚫ The shipment of LONGi’s Hi-MO4 based on M6 wafer is over 10GW.

diffuse/anneal/furnace tube Soldering capacity Assembly line sizeGraphite frame size

The limitation of large wafer at cell and module side.

LONGi Confidential8


⚫ Based on the new build capacity and the entire industry chain, M10 wafer size was introduced to realize the

standardization of the manufacturing system and application system. It also realizes the reduction of module

manufacturing costs and system BOS costs.

⚫ Based on thorough analysis on module manufacturing and deployment processes, optimal module dimension is

determined, and corresponding wafer/cell size of 182mm is deduced.

⚫ Future innovation should focus back on the improvement of efficiency and power generation.

182 Optimal size for new capacity

• Industry chain cost

• Manufacturing yield

• Material supply capacity

• Module efficiency

Production feasibility & cost

• Mechanical load

• Hot spot

• Junction box

Module reliability

• Mountain scene matching

• Design of 120m long array

• Tracking system

• Cable matching

System compatibility

• Container loading and unloading

• Transport reliability

• Security

Module transportation

• Installation efficiency

• Installation damage rate

Manual installation

LONGi Solar @ 2020

2. LONGi Product Portfolio

LONGi Confidentialwww.longi-solar.com LONGi Confidential

Products Offering

10

Product Series Hi-MO4 Hi-MO5

Main Power

60-cell: 380W(20.8%)

66-cell: 415W(20.8%)

72-cell: 450W(20.7%) *

72-cell: 540W(21.1%)

Features• P-PERC with low LID

• 9BB half-cell

• M6 Ga-doped mono wafer

• P-PERC with low LID

• 9BB half-cell

• M10 Ga-doped mono wafer

Product Strategy• Products for residential, C&I rooftop

and utility.• Products for large power plants.

Photo

* 66-cell monofacial Hi-MO4(410/415W) is available in 2021

ResidentialC&IResidential C&IResidential

60c

370~385W

20.3~21.1%

1755×1038mm

(1.8m2)

19.5kg

66c

410~420W

20.5~21.0%

1924×1038mm

(2.0m2)

22.0kg

72c

450~460W

20.7~21.2%

2094×1038mm

(2.2m2)

23.5kg

Suitable for Different Application Scenarios

Standardized width, optional in length

⚫ The length of the module covers the range of 1.75~2.1m

⚫ Module weight covers the range of 19.5~23.5kg

11


Hi-MO5 Series

12

• Ultra high power

Front side power up to 545W (21.3% efficiency) by using

M10 wafer. Best choice for ultra-large power plants

• Insight on size

The optimal module size for power plants. Taking into

account every factors such as manufacturing yield,

transportation, reliability, and BOS cost to the industrial chain.

• Smart Soldering Technology

Integrated segmented ribbons maximize front side light

capturing and connect cells with reduced gap. A combination

of high efficiency and high reliability

Hi-MO5m (72c) Hi-MO5 (72c)

2256×1133mm

27.2kg

2256×1133mm

32.3kg

Optimal module size for large power plants

LONGi Solar @ 202013

Smart Soldering Technology

⚫ Micro-gap

The best combination of high efficiency,

reliability and cost

⚫ Flat section

achieve dense soldering with low stress⚫ Triangular section

maximize the use of sunlight

Using integrated segmented ribbons.

Module efficiency increasing by 0.3% compared to conventional MBB product.


R&D Focus

14

Peter Dold. CPVC 2017

• LONGi continues to develop and evaluate advanced technologies.

• We will introduce the right technology into production when it makes

economic sense for customers.

Technology Efficiency (vs PERC) Challenges

Passivated Contact + 0.8~1.0% Reduce Cost

Heterojunction + 0.8~1.0%(Mass production)

HVM* feasibility

Reduce Cost

Back Contact + 1.5~2.5%HVM feasibility

Reduce Cost

Tandem /Suitable top cell

HVM feasibility

*High Volume Manufacturing

PERC

LONGi Solar @ 2020

3. Advantages of LONGi Product


10.9% - white gravel

Pahrump, USA11.1% - Gravel

Livermore,

USA

(1P Tracker)10.1% - grass

14.5% - concrete

15.8% - sand

20.6% - white coating

Hainan, China

19.3% - white gravel

Chennai, India

11.4% - sand

Thuwal, Saudi Arabia

4.4% - black fabric

10.6% - gray asphalt

15.7% - white fabric

Fremont, USA

Ding’an, HainanChennai, IndiaThuwal, Saudi Arabia

Baseline：Monofacial PERC module

Fremont, USA Pahrump, USALivermore, USA

Albedo: 21.4% Albedo: 37.9%Albedo: 24.0%

16.0%

43.1%

40.5%

67.2%Albedo:

LONGi Confidential

8.3% - Gravel

Livermore,

USA

(2P Tracker)

14.5%-concrete,

China

Building the bifacial module with best bankability

Advantage of LONGi Product


Manufacturer Manufacturer A Manufacturer B Manufacturer C- Manufacturer D

Grass Albedo 21% 5.57% 6.57% 7.46% 7.23%

White Albedo 45% 8.28% 8.78% 11.44% 10.73%

0%

3%

6%

9%

12%

15%

18%

0

1

2

3

4

5

6

10/2019 11/2019 12/2019 1/2020 2/2020 3/2020

PVEL outdoor test results of LONGi bifacial module(average daily power generation Wh/kWp)

Grass Monofacial Yield White Monofacial Yield

Grass Bifacial Yield White Bifacial Yield

Grass Bifacial Gain White Bifacial Gain

PVEL bifacial module test

17Source: Bifacial bake off: comparing technologies and manufacturers, PVEL at BiFi Workshop, July 2020

⚫ PVEL studied the reliability and

bifacial energy gain of modules

from different manufacturers,

and found obvious differences

⚫ The results shows that energy

gain of LONGi bifacial module

is higher than other

manufacturers

⚫ The pilot project site is located

in Davis, California, USA

Advantage of LONGi Product


⚫ Test organized by German PV magazine, together with CEA and Zhongsen. Mass-produced products sampling test by CEA

⚫ The energy yield of LONGi module is significantly better than other products

Advantage of LONGi ProductHigh Energy Yield

75 80 85 90 95 100

LONGi LR6-60BP-300M

A/310Wp

B/285Wp

LONGi LR6-60PE-310M

Sample 2

A/310Wp

G/280Wp

C/275Wp

E/280Wp

F/270Wp

D/300Wp

G/265Wp

Monthly energy yield 2018.11~2020.5(Wh/Wp)

Mono biPERC N-PERT Mono PERC Mono Multi MWTMulti


Advantage of LONGi ProductHigh Reliable

2020

⚫ LONGi is the only manufacture that has performed well in all 8 indicators in the RETC’s PV module index report 2020

Brand DML DH2000 PID Pan file PTC to STC Thresher LID Efficiency Overall

LONGi

A

B

C

D

E

DH2000（1/2）

PL<2%

DML（1/1）

PL<1%

PID 196h（1/2）

PL<1%

TC600,HF30,DH2000,UV,DML（1/4）PL<2%

LONGi Solar @ 202020

Mounts and foundation

-2.3%

Combiner box /

Cables -1.3%

Labor /

Land -0.6%

Hi-MO5

595W 540W

210,60CMideast; 2P fix mounts

Hi-MO5 can save BOS cost 0.15￠/W

Cost saving ratio

Advantage of LONGi ProductEconomic:

BOS is lower than 595W modules in ultra-large flat scenario (120m rack).

Inverter /

LONGi Confidential21

Summary

⚫ LONGi insists on providing high value product to customer.

⚫ Technology trend should be: High efficiency, high reliable and high energy yield.

⚫ There is optimal module size for residential, C&I, utility scenarios, big is not always better.

BOS

Technology Trend

High energy yield High Efficiency Reliable

technology trend of pv module...2021/02/05 · 7 longi confidential technology trend of pv module...

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