About Pattern Development

October 7, 2015

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© 2015

Company Overview

4

About Pattern Development

Pattern Energy Group LP (Pattern Development) is a leading independent wind, solar and transmission development company

We develop and construct renewable energy and transmission assets in the United States, Canada, Mexico, Chile, and Japan

Our current development pipeline includes 5,900 MW of wind and solar power projects in addition to transmission projects

By combining creativity, focus, and a scientific approach, we have advanced our position as an industry leader and shown consistent, groundbreaking work

Our experience includes many industry firsts, such as the first to successfully develop utility-scale wind energy projects on the Gulf Coast of Texas, within the State of Nevada, and within the Commonwealth of Puerto Rico

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About Pattern Development

Our highly-experienced team has brought more than 4,000 MW of wind power to market

We have expertise in all project stages: resource analysis, site development, finance, construction, and asset management

Pattern Development’s affiliate company, Pattern Energy Group Inc. (Pattern Energy), is an independent power company listed on the NASDAQ (“PEGI”) and Toronto Stock Exchange (“PEG”)

– Pattern Energy has a portfolio of 16 wind power facilities with a total owned interest of 2,282 MW in the United States, Puerto Rico, Canada, and Chile

We have a strong commitment to delivering the highest value for our partners and the communities where we work while promoting environmental stewardship and corporate responsibility

Offices in San Francisco, Houston, San Diego, New York, Toronto, Mexico City, Santiago, and Tokyo

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Our Values

Commitment to Innovation

– Utilize the latest science and technology in our development, construction, and operations processes

– Deploy new technology to mitigate environmental impacts

Commitment to Quality

– Focus on quality at every step of the development process to build projects that maximize production and last for the long-term

– Use sophisticated engineering techniques, hire industry leading contractors, and procure state-of-the-art equipment from vendors

Commitment to Safety

– Implement industry leading safety protocols that strive to ensure safe work environments and project sites

– Incorporate safety into our decision making processes and consider it throughout all stages of our projects’ lifecycles

Cohesive Management Team Since 2002

Financed and managed

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Cumulative Megawatts (financed and managed by Pattern Development management)

4,500 MW+of capacity

30+wind projects completed

$12 billion+energy infrastructure assets financed

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000

PATTERN DEVELOPMENT

34%Compounded annual growth rate

2003–2015

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

Core Competencies

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Finance & Permitting Contract negotiation Project finance Permits / Real estate finalization Insurance Third party verification Hedging

Origination & Development Greenfield / Acquisition Meteorology and analytics Community relations Utility and supplier relationships Transmission /

Interconnection planning

Construction Engineering Construction management Project administration Site Biological and Archeological

monitoring and mitigation Environmental, Health and

Safety management

Ownership in Pattern Energy Group Inc.

Publicly traded company

Public Shareholders

Ownership

(1) Represents shares held by the public shareholders as well as certain directors and certain members of management

~77%(1)

~23%

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NASDAQ listing: PEGI

TSX listing: PEG

IPO on October 2, 2013

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International Portfolio of Developed Projects

Chile

KS

JapanCanada / United States / Mexico

FS

EAW

MW

SJW

AWGRWK2W

SKW

AWF

SIW

GW

LGW

PW1PW2

OW

HRWSVW

CS

Pattern Development Pattern Energy

Conejo Solar

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Chile Vision: Conejo Solar

Pattern Chile Development Holdings SpA, a subsidiary of Pattern Energy Group LP, is constructing the first phase of its Conejo Solar PV project (Conejo Solar)

Located approximately 30 kilometers east of Taltal in the Atacama Desert

The 122 megawatts (MW) Conejo Solar project is one of the largest solar projects in Latin America

Funded with an investment of USD $205 million in project financing

Conejo Solar is located on public lands owned by the government of Chile, under a long-term concession by the National Assets Ministry

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Chile Vision: Conejo Solar

Construction of the project is expected to be complete during the summer of 2016

The project  will connect to the Sistema Interconectado Central (SIC) transmission system

Conejo Solar has a 22-year power purchase agreement with Minera Los Pelambres, an affiliate of Antofagasta Minerals, for approximately 65% of the project’s output over the term of the agreement

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Chile Vision: El Arrayán Wind

Pattern Development built Chile’s largest wind power facility: 115 MW El Arrayán Wind

Located 400 km north of Santiago on the Chilean coast

Completed in the summer of 2014

Generates clean, renewable power equal to the needs of approximately 200,000 Chilean homes each year

El Arrayán Wind is owned and operated by Pattern Development’s affiliate company, Pattern Energy Group Inc. (Pattern Energy)

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Chile Vision: Moving Forward

Chilean market has shown the potential for development without subsidies

Distribution companies have now become a new area for energy offtakes

Mining industry continues to incorporate renewable energy as part of their energy supply

Grid is in the process of being upgraded in order to support the development of the market

Robust economy, a dollar denominated energy market, and ability to sign long term power supply agreements will continue to support investments in wind and solar

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Chile Vision: Moving Forward

Important that market participants have a long term view

Need of sustainable market development

Awareness of market size and current limitations on transmission

Combination of the latter will allow for a robust, increasing share of renewable energy in Chile’s energy mix

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Chile Vision: Moving Forward

Pattern Development is proud to lead the way to broaden deployment of renewable energy for the Chilean mining industry

Our projects with AMSA demonstrate that a global mining company and a leading renewable energy developer can succesfully work together

We were able to create a successful partnership through understanding the needs of our mining partner and being flexible in how we meet those needs

We aim to enhance our position as one of the leading contributors to Chile´s renewable energy market by continuing to establish partnerships with the mining industry