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National Semiconductor and Suntech Collaborate on SolarMagic Technology for PV Systems

Cooperation Seeks to Increase Efficiency of Solar Arrays

May 27, 2009

May 27, 2009 - National Semiconductor Corp. (NYSE:NSM), of Santa Clara, Calif. (USA), and Suntech Power Holdings Co. Ltd. (NYSE:STP), the world’s largest crystalline silicon photovoltaic (PV) module manufacturer, have signed a memorandum of understanding (MOU) to evaluate National Semiconductor’s SolarMagicTM technology with the intention of jointly promoting the technology and developing future solutions.

National’s SolarMagic power optimizers use distributed electronics throughout a solar installation to recoup energy lost due to real-world conditions such as shade, debris and panel mismatch.

"We are proud to be working with Suntech, the world's leading manufacturer of crystalline silicon photovoltaic modules, a company that shares our vision for what it will take to increase the adoption of solar," said Michael Polacek, Senior VP of Key Market Segments and Business Development for National Semiconductor. “Our strength in analog and power management lends itself well to solar, enabling us to apply unique innovation to the solar market.”

“Innovation in the solar industry is a collaborative process and we are excited about this opportunity to potentially combine National Semiconductor’s SolarMagic technology with Suntech’s high efficiency solar panels,” said Dr. Cai, VP of Systems R&D for Suntech. “This innovative technology has the potential to improve power harvest for solar owners and thereby increase the affordability of solar systems.”

National developed SolarMagic technology to improve the energy harvest of solar arrays. Because of the characteristics of solar modules, real-world conditions—caused by shading from trees, chimneys or power lines; debris such as leaves or dirt, and panel aging—can lead to disproportionate power losses. SolarMagic compensates for these circumstances, creating a more consistent energy supply to the home or business owner.

About National Semiconductor
National Semiconductor is a leader in analog power management technology. Its products include easy-to-use integrated circuits, PowerWise products that enable more energy-efficient systems, and SolarMagic products which improve the energy output of solar arrays. The company celebrates its 50th anniversary this year. Headquartered in Santa Clara, Calif., National reported sales of $1.89 billion for fiscal 2008. Additional information is available at www.national.com.

About Suntech
Suntech Power Holdings Co., Ltd. (NYSE: STP) is the world's leading solar energy company as measured by production output of crystalline silicon solar modules. Suntech designs, develops, manufactures, and markets premium-quality, high-output, cost-effective and environmentally friendly solar products for electric power applications in the residential, commercial, industrial, and public utility sectors. With regional headquarters in China, Switzerland and the United States and sales offices worldwide, Suntech is passionate about improving the environment we live in and dedicated to developing advanced solar solutions that enable sustainable development. For more information, please visit http://www.suntech-power.com.