Power One Inc (1042825) SEC Filing 10-Q Quarterly report for the period ending Sunday, March 31, 2013

Exhibit 99.1

Investor Contact:

Larry Clark

Investor Relations for Power-One

Investor.Relations@Power-One.com

(310) 478-2700 ext. 29

POWER-ONE ANNOUNCES FOURTH QUARTER 2012 RESULTS

·      Quarterly revenue of $192 million

·      628 megawatts of inverters shipped in the quarter and 3.6 gigawatts, up 23% for the full year

·      Reports fourth quarter net loss per share of $0.14, includes a $0.04 net loss on FX remeasurement

·      Began commercially shipping new ULTRA product in Europe

Camarillo, CA, January 31, 2013

“In the fourth quarter of 2012, Power-One shipped 628 megawatts of inverters, lower than we initially expected and due to weakness in Germany and Italy,” said Richard Thompson, Chief Executive Officer of Power-One, “Despite the difficult current market conditions, our new products continued to be well received in the marketplace as our TRIO family of string inverters posted record sales for the year and our liquid-cooled ULTRA series of central inverters began shipping commercially in Europe in the fourth quarter and is expected to ship in the U.S. in the first quarter.”

“The worldwide PV market is expected grow by approximately 7% in 2013, largely driven by growth in North America and Asia-Pacific,” Mr. Thompson continued.  “We will benefit from this growth through our investment in these key markets and the introduction of industry-leading new product offerings.”

Renewable Energy Solutions

In the fourth quarter of 2012, Renewable Energy Solutions generated sales of $123 million and an operating loss of $8.5 million. The operating loss was primarily due to lower gross margins resulting from the revenue shortfall, new product ramp-up costs, lower pricing and inventory charges. In the quarter, Power-One shipped 628  megawatts of inverters, bringing the 2012 total to 3.6 gigawatts, an increase of  23% over 2011.

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