SunEdison Signs 20 MW PPA with the City of Riverside

             SunEdison Signs 20 MW PPA with the City of Riverside

SunEdison Awarded 85 MW in New Contracts with Riverside Public Utilities,
Southern California Edison, San Diego Gas and Electric

PR Newswire

BELMONT, Calif., Nov. 29, 2012

BELMONT, Calif., Nov. 29, 2012 /PRNewswire/ -- SunEdison, a leading worldwide
solar energy services provider and a subsidiary of MEMC Electronic Materials
(NYSE:WFR), today announced a new 25 year Power Purchase Agreement (PPA) to
deliver 20 megawatts (MW) to Riverside Public Utilities (RPU), the municipal
electric utility of the City of Riverside, California. 

SunEdison will construct the 20 MW North Lake I Solar plant on previously
disturbed land owned by the Metropolitan Water District near the Diamond
Valley Lake reservoir in western Riverside County. The project is expected to
deliver renewable energy and reduce the need for costly transmission upgrades
due to its proximity to load centers, including the RPU service territory.


"SunEdison's industry expertise and proven track-record give us great
confidence that the project will be delivered on-time to help meet our
renewable energy targets," said David H. Wright, RPU General Manager. "Our
partnership with SunEdison will enable us to deliver clean energy to our
citizens at cost-effective rates while also enhancing reliability with
peak-producing power. Riverside is an environmental leader among municipal
utilities, and this contract builds upon our environmental stewardship."

Riverside is among the first of California's municipal utilities to enter into
a utility-scale solar contract of this size. Under Senate Bill X 1-2,
California extended its Renewable Portfolio Standards (RPS) program goal to
33% and included publicly-owned utilities (POUs) such as Riverside.

"We are very excited to be working with the City of Riverside on this project
and consider them a progressive leader among municipal utilities in the
adoption of renewable energy," said Tim Derrick, General Manager of North
America for SunEdison. "We are looking forward to a strong relationship with
Riverside as we complete development and delivery of the North Lake solar
project." SunEdison plans to begin construction on the project in 2014 and
begin delivering power in 2015.

In addition to the contract from RPU, SunEdison also was awarded 3 PPAs
totalling 48 MW by Southern California Edison (SCE) and one 18.5 MW PPA by San
Diego Gas and Electric (SDG&E) under the Renewable Auction Mechanism (RAM)
program. The California Public Utilities Commission (CPUC) approved the SCE
contracts effective October 31, 2012 and is currently reviewing the SDG&E
contract. The RAM program requires that projects start operating 24 months
after CPUC approval.

About SunEdison
SunEdison is a global provider of solar-energy services. The company develops
finances, installs and operates distributed power plants using proven
photovoltaic technologies, delivering fully managed, and predictably priced
solar energy services for its commercial, government and utility customers. In
2011 SunEdison interconnected approximately 300 Megawatts of solar throughout
the world. For more information about SunEdison, please visit
http://www.sunedison.com

About MEMC
MEMC is a global leader in semiconductor and solar technology. MEMC has been
a pioneer in the design and development of silicon wafer technologies for over
50 years. With R&D and manufacturing facilities in the U.S., Europe, and
Asia, MEMC enables the next generation of high performance semiconductor
devices and solar cells. Through its SunEdison subsidiary, MEMC is also a
developer of solar power projects and a worldwide leader in solar energy
services. MEMC's common stock is listed on the New York Stock Exchange under
the symbol "WFR." For more information about MEMC, please visit www.memc.com.

About Riverside Public Utilities
Established in 1895, Riverside Public Utilities is a consumer-owned water and
electric utility governed by a board of nine community volunteers that
provides high quality, reliable services to over 106,000 metered electric
customers and up to 64,000 metered water customers throughout the City of
Riverside. The Utility is committed to increased use of renewable energy
resources and sustainable living practices that help reduce environmental
impacts within the City of Riverside and the state of California.
http://www.GreenRiverside.com

Forward-Looking Statements
Certain matters discussed in this press release are forward-looking
statements, including that SunEdison plans to begin construction on the North
Lake solar project in 2014 and begin delivering power thereunder in 2015.
Such statements involve certain risks and uncertainties that could cause
actual results to differ materially from those in the forward-looking
statements. Potential risks and uncertainties include normal commissioning
risks attendant to large scale solar projects, delays or interruptions in
construction, deployment or activation; the timely availability of required
permits and authorizations for projects from governmental entities and third
parties; changes in applicable regulatory requirements and incentives for
production of solar power; and general business and economic conditions,
including seasonality of the industry, and other risks described in the
company's filings with the Securities and Exchange Commission. Additionally,
there can be no assurances that the CPUC approval will be provided for the
SDG&E project or that the SCE project or the SDG&E project will be built
within the CPUC approval timeframe or at all. These forward-looking
statements represent the company's judgment as of the date of this press
release. The company disclaims, however, any intent or obligation to update
these forward-looking statements.

SOURCE SunEdison

Website: http://www.sunedison.com
Contact: Dawn Brister, SunEdison, dbrister@memc.com, +1-407-414-0526; or Aaron
Perlut, Elasticity for SunEdison, +1-314-800-7218, aaron@goelastic.com; or
Michael Bacich, Riverside Public Utilities, +1-951-826-5422,
mbacich@riversideca.gov
 
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