Power-One to Present at Stephens Inc. Fall Investment Conference

Power-One, Inc. (NASDAQ:PWER), a leading provider of traditional and renewable energy power conversion and power management solutions, today announced that Richard Thompson, Chief Executive Officer, will present at Stephens Inc. Fall Investment Conference on November 18, 2009 at 9:30 AM Eastern Standard Time. This event will be held in New York City.

About Power-One

Power-One designs and manufactures energy-efficient power conversion and power management solutions for alternative/renewable energy, routers, data storage and servers, wireless communications, optical networking, medical diagnostics, military, railway controls, semiconductor test equipment, and custom applications. Power-One, with headquarters in Camarillo, CA, has global sales offices, manufacturing, and R&D operations in Asia, Europe, and the Americas. For information on Power-One and its products, visit the Company’s Web site at www.power-one.com.