SunPower Corporation
Apr 4, 2006

SunPower Begins Volume Shipments of its New Higher-Power Solar Panels

Company Increases Power Rating of Industry's Highest-Efficiency Panels, Further Extending its Competitive Advantage

SUNNYVALE, Calif., April 4, 2006 /PRNewswire-FirstCall via COMTEX News Network/ -- SunPower Corporation (Nasdaq: SPWR), a Silicon Valley-based manufacturer of the world's highest efficiency, commercially available solar cells and solar panels, today announced volume shipments of its new line of industry-leading solar panels. This next generation line of products comprises panels rated at 220, 215 and 95 watts respectively, and is designed to maximize energy production from a limited solar array footprint in residential, commercial, and remote power applications.

The new line of solar panels, SPR-220, SPR-215 and SPR-95, offers efficiencies of up to 17.7 percent, producing up to 50 percent more power in a given roof area compared to conventional solar panels, while reducing installation costs per unit of power. The SPR-215 panel incorporates the company's uniquely attractive, all-black design that enhances the appearance of roof-mounted solar systems. The SPR-220 was recently listed by Photon Magazine as the highest efficiency panel available worldwide.

"Our solar panels have historically offered a level of performance that far exceeds any other product on the market," said Peter Aschenbrenner, vice president of marketing and sales for SunPower Corp. "SunPower's new panels provide even higher efficiency while retaining the sleek look and feel that our customers highly value."

SunPower's solar panels have no moving parts, creating pollution-free electricity with no noise and virtually no maintenance. In addition, due to SunPower's all back-contact solar cell design, its high-tech, high-performance solar panels perform better than most other solar panels during cloudy or hot weather.

SunPower's SPR-220, SPR-215 and SPR-95 solar panels will replace the company's current offerings: SPR-210, SPR-200 and SPR-90. The new panels are now available in North America through SunPower's dealer network, and in Europe through the company's exclusive channel partner, SunTechnics.

About SunPower

SunPower Corp. designs and manufactures high-efficiency silicon solar cells and solar panels based on an all-back contact cell design. SunPower's solar cells and panels generate up to 50 percent more power per unit area than conventional solar technologies and have a uniquely attractive, all-black appearance. For more information on SunPower or solar technology, please visit the SunPower website at http://www.sunpowercorp.com . SunPower is a majority-owned subsidiary of Cypress Semiconductor Corp. (NYSE: CY).

Forward Looking Statement

Statements made in this release that are not historical in nature and that refer to SunPower's plans and expectations for the future, are forward-looking statements made pursuant to the Private Securities Litigation Reform Act of 1995. We use words such as "estimates," "anticipates," "believes," "expects," "future," "look forward," "planning," "intends" and similar expressions to identify such forward-looking statements. Our actual results may differ materially due a variety of factors, including but not limited to the risks identified in our filings with the Securities and Exchange Commission. All forward-looking statements included in this release are based upon information available to SunPower as of the date of this release, which may change, and we assume no obligation to update any such forward-looking statement.

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

SOURCE SunPower Corporation

Julie Blunden, Vice President External Affairs, +1-408-470-4277, or Helen Kendrick,
Communications Manager, +1-408-470-4285, or hkendrick@sunpowercorp.com, both of
SunPower Corporation
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