Casino Group Signs 14-Megawatt Solar Panels Supply Agreement With SunPower

Casino Group to Develop PV Systems on its Properties

SAN JOSE, Calif. and GENEVA, Sept. 8 /PRNewswire-FirstCall/ -- The French
retailer Casino Group and SunPower Corp. (Nasdaq: SPWRA, SPWRB) today
announced that SunPower will supply 14 megawatts of high-efficiency solar
photovoltaic panels to the supermarket conglomerate by the end of this year.
Casino Group will use the panels to install solar power systems ranging from
900 kilowatts to 5 megawatts on rooftops and parking structures on supermarket
locations in mainland France and the islands of Mayotte and La Reunion.

"This is the first step of a major new renewable energy initiative for Casino,
which includes a pipeline of projects to be developed over the next several
months," said Casino Chief Real Estate and Development Officer Jacques
Ehrmann. "SunPower's proven high-efficiency technology generates the most
power in space constrained areas. This will allow us to maximize the amount of
clean, renewable solar power that will be produced at our facilities, and
reinforces our commitment to sustainable development."

"As a successful business leader with one of the largest retail networks in
France, Casino understands that solar power today offers a great return on
investment. We are delighted to partner with Casino in significantly expanding
the rooftop solar market in France," said SunPower Senior Director Jorn
Jurgens.

SunPower will supply Casino with its SunPower(R) 315 Solar Panel and
SunPower(R) 305 Solar Panel, offering 315-watts and 305-watts per panel,
respectively. These panels are comprised of 96 SunPower solar cells that
deliver more energy production per square meter than conventional panels. The
315-watt SunPower solar panel currently offers the industry's highest
conversion efficiency of 19.3 percent. Some of the systems will be considered
building-integrated photovoltaic systems under the French feed-in-tariff
program.

With its European headquarters in Geneva, SunPower systems have been installed
on facilities operated by the Bon Preu Esclat supermarket chain in Spain, and
on multiple rooftops for US-based retailers such as Target, Wal-Mart Stores,
Macy's and Lowe's.

About SunPower
Founded in 1985, SunPower Corp. (Nasdaq: SPWRA, SPWRB) designs, manufactures
and delivers the planet's most powerful solar technology broadly available
today. Residential, business, government and utility customers rely on the
company's experience and proven results to maximize return on investment. With
headquarters in San Jose, Calif., SunPower has offices in North America,
Europe, Australia and Asia. For more information, visit www.sunpowercorp.com.

About Casino
Founded in 1898, the Casino Group is one of the world's leading food
retailers, active in multiple retail formats. Its operating performance, which
has grown steadily over the past several years and now exceeds the industry
average, is the result of the Group's unique position in the market and its
ability to anticipate changing lifestyles and consumer practices. The Group is
present in 11 countries around the world: Casino has chosen to focus its
efforts on emerging countries with high growth potential, primarily in South
America and Southeast Asia where its subsidiaries are industry leaders and
firmly anchored in their communities. For more information, visit
www.groupe-casino.com.

Forward-Looking Statements
This press release contains forward-looking statements within the meaning of
the Private Securities Litigation Reform Act of 1995. Forward-looking
statements are statements that do not represent historical facts and may be
based on underlying assumptions. The companies use words and phrases such as
"to develop," "will," "pipeline" and "offers" to identify forward-looking
statements in this press release, including forward-looking statements
regarding: (a) Casino Group developing PV systems on its properties; (b)
SunPower supplying 14 megawatts of high-efficiency solar photovoltaic panels
by the end of 2009; (c) Casino Group developing a pipeline of projects over
the next several months; and (d) SunPower's panels allowing Casino Group to
maximize the amount of clean, renewable solar power that will be produced at
its facilities and offering a great return on investment. Such forward-looking
statements are based on information available to the companies as of the date
of this release and involve a number of risks and uncertainties, some beyond
their control, that could cause actual results to differ materially from those
anticipated by these forward-looking statements, including risks and
uncertainties such as: (i) construction difficulties or potential delays in
the project implementation process; (ii) unanticipated delays or difficulties
securing necessary permits, licenses or other governmental approvals; (iii)
the risk of continuation of supply of products and components from suppliers;
(iv) unanticipated problems with deploying the system on the sites; (v) actual
electricity generation; (vi) the actual energy consumption rate; (vii)
unexpected changes in utility service rates; (viii) exercise of early
termination rights under the supply agreement; and (ix) other risks described
in SunPower's Annual Report on Form 10-K for the year ended December 28, 2008,
its Quarterly Report on Form 10-Q for the quarter ended June 28, 2009, and
other filings with the Securities and Exchange Commission. These
forward-looking statements should not be relied upon as representing the
companies' views as of any subsequent date, and the companies are under no
obligation to, and expressly disclaim any responsibility to, update or alter
their forward-looking statements, whether as a result of new information,
future events or otherwise.

SunPower is a registered trademark of SunPower Corp. All other trademarks are
the property of their respective owners.

SOURCE SunPower Corp.

Elodie Van Doan of Ogilvy Public Relations, +33 1 53 67 12 50,
Elodie.DoanVan@ogilvy.com, for SunPower Corporation; or Ingrid Ekstrom of
SunPower Corporation, +1-510-260-8368, iekstrom@sunpowercorp.com