SunPower Corporation
Oct 26, 2009

SunPower Announces World-Record Solar Panel With a 20.4 Percent Total Area Efficiency

Prototype Developed Using Funding From the DOE Solar America Initiative

SAN JOSE, Calif., Oct 26, 2009 /PRNewswire-FirstCall via COMTEX News Network/ -- SunPower Corp. (Nasdaq: SPWRA, SPWRB), a Silicon Valley-based manufacturer of high-efficiency solar cells, solar panels and solar systems, announced today that it has produced a world-record, full-sized solar panel with a 20.4 percent total area efficiency. The prototype was successfully developed using funds provided by the U.S. Department of Energy (DOE) under its Solar America Initiative (SAI), which was awarded to SunPower approximately two years ago.

The new 96-cell, 333-watt solar panel is comprised of SunPower's third generation solar cell technology that offers a minimum cell efficiency of 23 percent. In addition, the larger area cells are cut from a 165 mm diameter ingot and include an anti-reflective coating for maximum power generation. With a total panel area of 1.6 square meters, including the frame, SunPower's 20.4 percent panel achieved the highest efficiency rating of a full sized solar panel and this rating was confirmed by the National Renewable Energy Lab (NREL), an independent testing facility.

"SunPower has the engineering expertise and proven technology to accomplish this remarkable milestone in such a short period of time," said Larry Kazmerski, executive director, science and technology partnerships, located at NREL. "My colleagues at the DOE and NREL had cautioned me that reaching a 20 percent solar panel was a stretch, but this did not dampen my optimism that it would happen. I congratulate SunPower and its team of talented engineers on realizing this accomplishment."

SunPower expects to make the 20.4 percent efficiency solar panel commercially available within the next 24 months. The company plans to begin operating a U.S. panel manufacturing facility in 2010 using automated equipment designed and commercialized with SAI funding. SunPower recently announced the availability of the SunPower T5 Solar Roof Tile (T5), the first photovoltaic roof product to combine solar panel, frame and mounting system into a single pre-engineered unit. The T5 was also developed using research and development funds from the SAI.

"We are excited with the rapid pace in which we've been able to develop these advanced technologies," said Bill Mulligan, SunPower's vice president of technology and development. "Without the funding from the SAI, it would have taken us much longer to deliver both the world-record 96-cell solar panel and the innovative T5 Solar Roof Tile. We appreciate the DOE's continued support of the solar energy industry."

The Solar America Initiative is focused on accelerating widespread commercialization of clean solar energy technologies by 2015 and to provide the U.S. additional electricity supply options while reducing dependence on fossil fuels and improving the environment. It aims to achieve market competitiveness for solar electric power through government partnerships with industry, universities, national laboratories, states, and other public entities by funding new research and development activities.

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.

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 company uses words and phrases such as "expects" and "plans" to identify forward-looking statements in this press release, including forward-looking statements regarding: (a) commercial availability of the 20.4 percent efficiency solar panel; and (b) operating a U.S. panel manufacturing facility in 2010. Such forward-looking statements are based on information available to the company as of the date of this release and involve a number of risks and uncertainties, some beyond the company's control, that could cause actual results to differ materially from those anticipated by these forward-looking statements, including risks and uncertainties such as: (i) the company's ability to obtain and maintain an adequate supply of raw materials and components, as well as the price it pays for such items; (ii) the continuation of governmental and related economic incentives promoting the use of solar power; (iii) construction difficulties or potential delays; (iv) the company's ability to ramp new production lines; (v) manufacturing difficulties that could arise; (vi) the success of the company's ongoing research and development efforts; and (vii) other risks described in the company'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 company's views as of any subsequent date, and the company is under no obligation to, and expressly disclaims any responsibility to, update or alter its forward-looking statements, whether as a result of new information, future events or otherwise.

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

SOURCE SunPower Corp.

http://www.sunpowercorp.com

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