SunPower Corporation Unveils New Line of High-Efficiency Inverters

New Products Specifically Engineered to Maximize Solar Energy Production

SUNNYVALE, Calif., June 2, 2005 - SunPower Corp., a Silicon Valley-based subsidiary of Cypress Semiconductor Corp. (NYSE: CY), today announced the introduction of a comprehensive new line of SunPower inverters. The new inverters will be offered to SunPower's North American customers as part of a fully engineered high-performance system solution.

SunPower's new inverters are offered in three power ratings: 2,000 watts (120V), 2,900 watts (208V) and 3,200 watts (240V). Each model is designed specifically to match the electrical characteristics of the company's ultra-high efficiency solar panels, thereby maximizing system energy production every day, all year long. All of SunPower's inverters have received the highest efficiency rating in their class as part of an independent testing program developed by the California Energy Commission. The new product line also carries the best warranty available as a standard feature.

"SunPower's solar panels already produce up to 50 percent more power on a typical residential roof compared with conventional panels," said Tom Werner, SunPower's CEO. "Our new line of high-efficiency inverters further enhances the performance advantage of SunPower's solar systems and allows us to offer our customers an unmatched 10-year standard product warranty on the entire system.

"In addition to producing more power under full sunlight conditions," Werner continued, "SunPower's solar panels perform better than conventional panels in both cloudy and hot weather. By carefully matching the operating characteristics of these new inverters to our solar panels, we ensure that our customers can capture the maximum amount of solar energy from their roof every day of the year."

To learn more about SunPower's solar systems, see

About SunPower

SunPowera Silicon Valley-based majority-owned subsidiary of Cypress Semiconductor Corp. (NYSE: CY)designs and manufactures ultra-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 square foot 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

About Cypress

Cypress solutions are at the heart of any system that is built to perform: consumer, computation, data communications, automotive, industrial, and solar power. Leveraging a strong commitment to customer service and performance-based process and manufacturing expertise, Cypress's product portfolio includes a broad selection of wired and wireless USB devices, CMOS image sensors, timing solutions, network search engines, specialty memories, high-bandwidth synchronous and micropower memory products, optical solutions, and reconfigurable mixed-signal arrays. Cypress stock is traded on the New York Stock Exchange under the ticker symbol CY. More information about the company is available online at

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