This presentation provides an introduction to JA Solar, a leading solar company based in Shanghai, China. Some key points: - JA Solar is one of the largest solar cell manufacturers in the world with 2010 shipments of 1.46GW and current annual capacity of 2.1GW. - The company has an optimized vertical integration model from polysilicon to solar wafers, cells, and modules. - JA Solar has an experienced management team and focuses on high efficiency, quality products with world-leading solar cell conversion efficiencies. - In Q3 2010, JA Solar ranked as the #1 supplier of solar cells globally based on megawatt shipments according to Solar

1. JA Solar
Corporate Presentation
March 2011
Protect the one Earth we all share, for this and future generations.

2. Forward-looking Statements
This presentation contains forward-looking statements. These statements relate to future
events or to future financial performance and involve known and unknown risks, uncertainties,
and other factors that may cause our actual results, levels of activity, performance, or
achievements to be materially different from any future results, levels of activity, performance,
or achievements expressed or implied by these forward-looking statements. In some cases,
you can identify forward-looking statements by the use of words such as “may,” “could,”
“expect,” “intend,” “plan,” “seek,” “anticipate,” “believe,” “estimate,” “predict,” “potential,”
or “continue” or the negative of these terms or other comparable terminology. You should not
place undue reliance on forward-looking statements because they involve known and
unknown risks, uncertainties and other factors that are, in some cases, beyond our control
and that could materially affect actual results, levels of activity, performance, or achievements.
Any forward-looking statement you see or hear during this presentation reflects our current
views with respect to future events and is subject to the risks, uncertainties, and assumptions
relating to our operations, results of operations, growth strategy, and liquidity. We assume no
obligation to publicly update or revise these forward-looking statements for any reason,
whether as a result of new information, future events, or otherwise.

3. Introduction to JA Solar

4. Introduction to JA Solar
One of the Leading Solar Companies in the World
Headquarters Shanghai, China
Date Est’d / IPO May 2005 / February 2007
Business Largest dedicated solar cell manufacturer
2010
Shipments 1.46GW
World class quality, conversion efficiency,
Attributes
and cost structure
Annual
Capacity 2.1 GW (Cell)
Conversion 17.8% mono, 16.5% multi; continuous
Efficiency improvement and innovations
Ticker Symbol JASO
Employees ~11,000
4

5. Experienced Management Team
Baofang Jin Dr. Peng Fang Jian Xie
Executive Chairman Chief Executive Officer Chief Operating Officer
 Executive chairman of JA Solar.  Board Director and Chief  Board Director and Chief Operating
 Chairman of the board of Executive Officer of JA Solar. Officer of JA Solar.
directors and chief executive  Former president of Huahong  Mr. Xie has served in such
officer of Jinglong Group. NEC. Winner of the Shanghai capacities as the company's director
 National People's Congress, Magnolia Prize. of corporate finance, director of
vice-chairman of the Chinese  The Board Director of UCGEC investor relations, assistant to the
People's Political Consultative and was chairman of the IEEE chief executive officer, secretary of
Conference of Ningjin County. Electron Devices Society. the board of directors and vice
president of Sales.
Anthea Chung Yong Liu Ming Yang
Chief Financial Officer Chief Technology Officer Vice President of IR & BD
 Chief Financial Officer of JA  Board Director and Chief  Vice president of JA Solar.
Solar. Technology Officer of JA Solar.  More than six years of experience
 More than 16 years of financial  More than 15 years of operation working as a Wall-Street buyside
management experience at management experience at and sellside analyst , specializing
public and private companies. semiconductor wafer and solar in the renewable energy and
 Former Chief Financial Officer cell manufacturing facilities. semiconductor materials sectors.
of Solar Enertech Corp.  Former director of SMIC.  Former vice president of Piper
 Former VP and Corporate Jaffray.
Controller of RAE Systems Inc.,
5

6. Introduction to JA Solar
Optimized Vertical Integration Model
POLYSILICON SILICON WAFERS CELL MODULE SYSTEMS
Solar Wafers Solar Cells PV Modules
Strategy: •High efficiency wafer research Product: High performance mono and Strategy: •High quality product with high
•Lower wafer cost multi-crystalline solar cells quality BOM
•Higher gross margin Location: •Ningjin, Hebei province •Additional channel for product
Location: Lianyungang, Jiangsu province •Yangzhou, Jiangsu province distribution
•Brand building
Capacity: 2.1GW
•OEM & White label module
Capacity: 300MW Efficiency •World leading solar cell Location: Shanghai
and Key company Capacity: 500MW
Timeline: Full production of 300MW by Attributes: •17.8% (mono); 16.5% (multi)
year end 2010 Timeline: OEM production for leading
•18.9% high eff cell (Secium)
global brands
•18.2% high eff cell (Maple)
Full production by year end
•High quality, strong reputation
2010
6

7. Introduction to JA Solar
JA Solar Milestones
May 2005 Apr 2006 Dec 2007 Sept 2008 Q4 2009 Q3 2010
Ningjin Jinglong 1st Commercial JA Corporate HQ New Yangzhou Established Achieved
Zhong’ao Production established in Fab Mass module business cumulative
Established Ningjin 25MW Shanghai ―JA Production in Shanghai and shipment of over
PLAZA achieved wafer business in 1GW
BUILDING” Lianyungang
2005 2006 2007 2008 2009 2010 2011
Nov 2005 Feb 2007 Q1 2010 Q4 2010
Renamed Jing NASDAQ IPO Achieved Achieved
Ao Solar Co. Followed by a shipment run capacity
Limited Secondary rate of over of 2GW
The name JA Offering in Oct. 1GW
SOLAR is born 2007
7

8. JA Solar Differentiation
JA Solar Key Attributes
Protect the one Earth we all share,
for this and future generations.
Large Scale  Superior  Industry Leading  Continue to
 Technology
Execution Financial Execute on
Operations Leadership
Capabilities Performance Growth Strategy
8

9. World’s Largest Solar Cell Supplier in Q3 2010
 JA Solar ranked #1 in megawatt shipments in 3Q 2010 based on Solarbuzz Quarterly
 #1 solar cell supplier with substantial market share – Scale, Quality, Technology, and Cost Structure leadership
Q2 2010 Solar Cell & Module Shipments（MW）
Source: Solarbuzz Quarterly
9

10. Substantial Shipment Growth & Market Share
Gain - CAGR over 90%
500 463 465~475
450 418
400
350
311
300 272
250 231
200 177
150
99.1
100 77
65.7 61
43.8 50.2 51.4
50 14.4 24 24
0
1Q07 2Q07 3Q07 4Q07 1Q08 2Q08 3Q08 4Q08 1Q09 2Q09 3Q09 4Q09 1Q10 2Q10 3Q10 4Q10 1Q11 2Q11 3Q11 4Q11
FY11(E)= 2.2GW
FY10= 1.46GW
FY09 =509MW
FY08 = 277MW
FY07 = 132MW
10

11. Customer Base

12. Substantial Geographic & Customer Diversification
Q1 2010 Q2 2010 Q3 2010 Q4 2010
• 36% of Sales Abroad • 46% of Sales Abroad • 53% of Sales Abroad • 53% of Sales Abroad
• 64% of Sales in China • 54% of Sales in China • 47% of Sales in China • 47% of Sales in China
1. China 64% 1. China 54% 1. China 47% 1. China 47%
2. Europe 15% 2. Europe 24% 2. Europe 33% 2. Europe 35%
3. R.O.W 14% 3. R.O.W. 18% 3. R.O.W. 11% 3. R.O.W. 12%
4. U.S.A. 7% 4. U.S.A . 4% 4. U.S.A. 9% 4. U.S.A. 6%
12

13. Substantial Geographic & Customer Diversification
Added substantial number of new
customers over past two years,
including BP Solar, Solar-Fabrik,
MEMC/SunEdison, leading
European Tier-1 solar OEMs; as
well as new customers in
Germany, Italy, France, Korea,
Japan, India, and U.S.
13

14. Manufacturing and Technology

15. Large Scale Operations
World-class PV Manufacturing Facility over Multiple Locations
Lianyungang Wafer Facility
Ningjin Cell Facility
 Lianyungang, Jiangsu province
 Ningjin, Hebei province
 300MW capacity
 850MW capacity
Yangzhou Cell Facility
Shanghai Module Facility
 Yangzhou, Jiangsu province
 1250MW capacity  Fengxian , Shanghai
 State-of-the-art PV R&D Center  500MW capacity
___________________________
Note: Capacity refers to end of ’10 capacity.
15

16. Solar Cell Capacity Ramp 2008-2011
YangZhou 2100
2200
1900
2000 1800
1800
1600 1400
1400
1100
1200
1000 YangZhou
750 800
800
675
600 600
600
425
400
275
200
200
0
1Q08 2Q08 3Q08 4Q08 1Q09 2Q09 3Q09 4Q09 1Q10 2Q10 3Q10 4Q10 1Q11
YangZhou 50 50 125 200 250 500 700 1100 1200 1250
 Significant solar cell capacity ramps up with proven execution
 New state-of-the-art fab in Yangzhou implementing new process and technologies
16

17. Yangzhou Solar Cell Facility Overview
 1250MW solar cell fab incorporating next-generation technologies
 State-of-the-art R&D center – successfully developed SECIUM technology
 Implementing multiple new process with state-of-the-art tool set
 New process roll-outs: SECIUM, Hercules Process (+0.2% Eff); Dual-SP (+0.2-0.4% Eff)
 New process automation tools
17

18. Continuous Process Innovation Leads to
Higher Efficiency
Solar Cell Efficiency Trend with New Process Implementation
Multi-pronged
Secium Technology approach to
19.0%
R3 Process
efficiency
18.5%
improvement:
18.0%
R2 Process
17.5%
17.0% R1 Process  Emitter
Conventional Mono
16.5% Secium Cell
optimization
16.0%
15.5%
Optimized
15.0%
diffusion profile
1Q08 2Q08 3Q08 4Q08 1Q09 2Q09 3Q09 4Q09 1Q10 2Q10 3Q104Q10 1Q11 2Q11 3Q11 4Q11
18.0%
Optimize sheet
Maple
resistance
17.5%
17.0%
R3 Process Improved surface
16.5% passivation
R2 Process
16.0% Multi-crystalline
15.5% R1 Process Maple New process
15.0%
materials
14.5%
Advanced device
14.0%
1Q08 2Q08 3Q08 4Q08 1Q09 2Q09 3Q09 4Q09 1Q10 2Q10 3Q104Q10 1Q11 2Q11 3Q11 4Q11
architecture
18

19. New SECIUM High Efficiency Solar Cell
 Spectral response at short wavelengths region is  18.9% conversion efficiency solar cell certified
significantly enhanced compared to conventional cells by Germany’s Fraunhofer Institute
 Reduced recombination losses
 Increased Short Circuit Current and Open Circuit
Voltage leads to higher power output per cell
 Higher fill factor
。
Voc (mV) Isc (A) FF (%) Eff (%)
639.9±1.9 5.53±0.10 79.42±0.50 18.92±0.36
Quantum Efficiency Comparison
19

20. Technology Leadership – Volume Production at
18.6%
Recent Volume Production Results: Average Conversion Efficiency of 18.6%
Conversion Efficiency Distribution Over 13,800 Cells
Concentrating on Manufacturability of the High-efficiency Cells in 10Q2
Median: 18.60% 75% quartile: 18.75%
25% quartile: 18.42%
Min: 17.00% Max: 19.11%
20

21. Technology Leadership at 18.2% Efficiency
Maple technology, developed by JA Solar's
R&D team, enables significantly enhanced power
output from poly-crystalline silicon solar cells, which
exceed 17.5% in high volume average, and over
18.2% at highest.
Cells Datasheet—Maple 156MP
Maple cells feature silicon crystals that Efficiency (%) Pmpp (W) Umpp (V) Impp (A) Uco (V) Isc (A) FF (%)
are broader, flatter and have fewer grain 18.0-18.2 4.40 0.531 8.290 0.625 8.711 80.21
boundaries than traditional poly- 17.8-18.0 4.36 0.529 8.235 0.624 8.734 79.98
crystalline silicon, resulting in reducing
17.6-17.8 4.32 0.526 8.182 0.621 8.685 79.78
energy wastage and improving
conversion efficiency. Maple cells can be 17.4-17.6 4.26 0.524 8.123 0.619 8.642 79.56
produced using lower-cost poly- 17.2-17.4 4.21 0.522 8.064 0.617 8.598 79.36
crystalline silicon production
17.0-17.2 4.17 0.520 8.013 0.615 8.551 79.25
techniques, while the cells are closer to
mono-crystalline silicon solar cells in 16.8-17.0 4.12 0.517 7.960 0.613 8.493 79.11
terms of conversion efficiency. 16.6-16.8 4.07 0.515 7.898 0.612 8.430 78.96
21

22. Technology Roadmap
Clear roadmap to
20% solar cell
efficiency
22

23. Fengxian (Shanghai) Module Facility Overview
 500MW Module capacity
 World-class quality system
 High quality materials
 Module reliability lab
 Successful ramp-up with strong demand from diverse customer base
 Significantly increase shipment and revenue opportunity with direct access to end customers
23

24. World Class QA System
Quality Reliability Assurance
Custom Quality Quality/Reliability
QA/Certification Quality Control Center Management Lab
QA DCC Product SQM OQA CS RMA Reliability FA
Quality Document Supplier Quality Outgoing Quality Customer Return Material Failure
System Control
Certification Management Support
Lab Analysis
Assurance Approval
IQC 2nd IPQC OQC
Incoming In-Process Outgoing
Quality Source
Quality Control Quality Control
Control
QA: Quality system control and ISO 2nd Source: 2nd Source guide, Overall CS: 1.Customer Complaint Handling RL: Reliability Analysis
quality system maintenance, management of the responsible 2.Coordinate various functions to FA: Failure Analysis &
internal and external customer supplier(s) provide containment, corrective and Calibration
audit preventive actions to customer management &
IQC: Incoming material inspection and
3.Customer various functions to drive MSA
DCC: Document Control& EC quality control quality improve activities to achieve
Control OQC: Shipping Inspection customer quality expectation
4.Contact windows with customer on
IPQC: In-process Quality Control quality
RMA: Return Materiel Repair center
24

25. Financial Performance

26. Industry Leading Financial Performance
Shipment (MW) Revenue (US$ mn)
463 584
418 541
311
272 351
231 279
177 238
193
3Q09 4Q09 1Q10 2Q10 3Q10 4Q10 3Q09 4Q09 1Q10 2Q10 3Q10 4Q10
Gross Margin (%) Net Profit (US$ mn)
22.9% 23.1% 22.5% 118.7
20.5%
19.2%
16.7%
76.8
38.4
28.9
15.6 21.0
3Q09 4Q09 1Q10 2Q10 3Q10 4Q10 3Q09 4Q09 1Q10 2Q10 3Q10 4Q10
 Achieved record shipment, sales and net profit in 4Q10.
26

27. Industry Leading Financial Performance
Solid Revenue Growth and Profitability
Q3 2010 shipment 418MW; Q4 2010 shipment 463 MW 11% Q/Q growth
54.5% Q/Q net income growth from Q3 to Q4 2010
Strong financial performance
Review of 4Q 2010 Results
($ in millions) 1Q2010 2Q 2010 3Q 2010 4Q 2010
Shipment 272MW 311MW 418MW 463MW
Q/Q growth 18% 14% 34% 11%
Revenue 279 356 541 584
Q/Q growth 17.1% 27.5% 52.0% 7.9%
Gross Profit 64 81 122 112
Gross Margin 22.9% 23.1% 22.5% 19.2%
Operating Profit* 51.7 62.9 99.9 89.5
Operating Margin* 18.5% 17.9% 18.5% 15.3%
Net Income 38.4 28.9 76.8 118.7
EPS 0.24 0.18 0.47 0.59
* Q2 2010 Core Operating profit excludes impact of one-time Shunda prepayment provision
27

28. Industry Leading Financial Performance
Strong Balance Sheet
 $346.9M in cash at the end of 4Q 2010
 $1.76B in total assets, $1.01B in shareholder’s equity
 Strong operating cash flow: $193.9 million for full year 2010
 >US$250 million of credit facilities available through banks
 Signed a RMB 30 billion credit agreement with China's Development Bank
 Strong capital position to fund growth
 Target ROIC >30%
Guidance
 Q1 2011 Shipment 465~475MW
 Full year 2011 Shipments to exceed 2.2GW
Strong balance sheet to support company’s growth initiatives
28

29. JA Solar: Investment Thesis Summary
Growing customer base and geographic
diversification
Strong financial performance with cash
generation
Strong management team with proven
execution
Technology and cost leadership
Strong balance sheet to fund growth
Clear R&D Roadmap to increase
efficiency >20%
29

30. Thank you!