SunPower Announces First U.S. Commercial-Scale Solar System

New Los Altos Hills Town Hall Powered by Ultra-High Efficiency Solar Panels

SUNNYVALE, Calif., June 15, 2005 - SunPower Corp., a Silicon Valley-based subsidiary of Cypress Semiconductor Corp. (NYSE: CY), today announced that its high-performance solar electric panels are being used to generate electricity for the new Town Hall in Los Altos Hills, Calif. This is the first North American commercial-scale installation of SunPower's industry-leading solar panels.


The new $4.5 million City of Los Altos Hills' Town Hall is now open for business and the city will host a dedication ceremony on Thursday, June 16, 2005. The building has been recognized for its innovative design features, including its SunPower solar system and use of energy-saving design and technologies. The 37,000-watt Town Hall solar system uses 176 SunPower solar panels, with a Xantrex PV series inverter and was installed by EcoEnergies, Inc. of Sunnyvale, Calif.

SunPower's ultra-high efficiency solar panels generate up to 50 percent more power per square foot than conventional solar technologies, reducing system costs. SunPower's panels are offered with a unique all-black appearance that is particularly attractive to homeowners and architects.

"With our limited unshaded roof area, we wanted to use solar panels that would maximize energy production per square foot," said Breene Kerr, mayor of Los Altos Hills, Calif. "Solar energy provides a sustainable solution to the Town Hall's energy needs while blending into the design. We are offering the public an example that we hope they will follow."

Tom Werner, SunPower's CEO said, "We are delighted that the town of Los Altos Hills has selected SunPower's ultra-high efficiency solar panels for its Town Hall, a distinguished, environmentally sensitive building. Projects like these demonstrate the excellent progress being made toward California's 'million solar roofs' goal."

SunPower's solar panels have no moving parts and create pollution-free, no-cost electricity with virtually no maintenance. Due to SunPower's patented all-back contact cell design, its high-tech, high-performance solar panels perform better than comparable systems in both cloudy and hot weather.

For more information about SunPower's solar panels, visit the SunPower website at http://www.sunpowercorp.com/html/Products/Solar/modules.html.

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 modules based on an all-back-contact design. SunPower's solar cells and modules 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 http://www.sunpowercorp.com.

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 www.cypress.com.

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