Power-One Surpasses One Million Mark for PV Inverters Sold

Power-One Surpasses One Million Mark for PV Inverters Sold

Global Installed Base Exceeds 10 GW

CAMARILLO, Calif., March 19, 2013 (GLOBE NEWSWIRE) -- Power-One, Inc.
(Nasdaq:PWER), a leading global manufacturer of renewable energy and
energy-efficient power conversion and management solutions, announced today it
has surpassed the one million mark for photovoltaic inverters sold worldwide.

This milestone can be attributed to the significant growth Power-One has
experienced over the past several years. In 2010, Power-One took over the
number two spot in global market share for solar inverters, with an installed
base of 3.2 GW. Today, the Company has an installed base of more than 10 GW,
representing a better than three-fold increase in just over two years.

"We are extremely proud of reaching this important milestone of one million
inverters sold, and are even more pleased with our impressive global installed
base of 10 GW," said Alex Levran, President, Renewable Energy Solutions at
Power-One, "This truly speaks to our technology leadership, our steady stream
of new and innovative product introductions, our geographic expansion strategy
and our strong distribution and post-sales network. We continue to respond to
the evolving needs of our customers, by delivering comprehensive solutions
across all market sectors and major geographies."

As a leading technology company in the solar inverter category, Power-One has
leveraged its innovation to introduce products which are highly regarded in
the PV industry, based on their flexibility and performance.

Power-One has launched a steady stream of innovative products over the years,
including most recently the ULTRA series of central inverters that deliver the
lowest LCOE in the utility-scale segment, the TRIO family of three-phase
string inverters designed for commercial rooftop applications that is
redefining the way people think about commercial applications, and the Aurora
MICRO, a feature-packed alternative for the residential market.

Geographically, the Company has expanded its presence in many countries around
the world, including North America, India, Australia, Latin America, Japan,
China, the Middle East and Africa and is ideally positioned to serve the
global PV market with a full complement of products.

About Power-One

Power-One is a leading provider of renewable energy and energy-efficient power
conversion and power management solutions and is the world's second largest
designer and manufacturer of photovoltaic inverters. Its renewable energy
products enable the industry's highest yielding conversion of power from solar
arrays for use by utilities, commercial enterprises and homes. Power-One has
a 40 year history as the leader in high efficiency and high density power
supply products for a variety of industries including Renewable Energy, Data
Storage & Networking, Industrial and Network Power Systems. The company is
headquartered in Camarillo, CA and has global sales offices, manufacturing,
and R&D operations in Asia, Europe, and the Americas. Power-One is traded on
NASDAQ under the ticker symbol PWER. For more information, please visit

The Power-One, Inc. logo is available at

Safe Harbor Statement

Statements made in this press release which state the Company's or
management's intentions, beliefs, expectations or predictions for the future
are forward-looking statements within the meaning of the Private Securities
Litigation Reform Act of 1995, and may include statements regarding
anticipated future productivity. It is important to note that future
performance and actual results could differ materially from those discussed in
or underlying such forward-looking statements as a result of risks and
uncertainties that cannot be predicted or quantified and that are beyond the
Company's control. Important factors that could cause actual results to differ
materially include, but are not limited to: economic conditions in general and
business conditions in the power supplies and renewable energy markets;
foreign exchange rates; the Company's ability to improve its operational and
supply chain efficiencies; competitive factors such as pricing and technology;
the timing and results achieved in completing product manufacturing
transitions to Company facilities in China or other low-cost locations; the
threat of a prolonged economic slowdown or a lengthy or severe recession;
continued volatility of the financial markets, including fluctuations in
interest rates and trading prices of the Company's equity securities; the
results of pending legal proceedings; the Company's ability to secure market
share in higher margin, high-growth markets; the market growth of product
sectors targeted by the Company as sectors of focus; and the Company's ability
to increase working capital. Additional information concerning factors that
could cause actual results to differ materially from expectations expressed in
this press release are describedin the Company's reports filed with the
Securities and Exchange Commission pursuant to the Securities Exchange Act of
1934 from time to time, whichare also available through the Company's Website
at www.power-one.com or through the SEC's ElectronicData Gathering and
Analysis Retrieval System (EDGAR) at www.sec.gov. Power-One undertakes no
obligation to publicly update or revise any forward-looking statement.

CONTACT: For Press Inquiries, please contact
         Chris Lawson, Global Director, Marketing Communications
         Tel.: +1 480-643-1758
         Email: Chris.Lawson@power-one.com
         For Investor Relations, please contact
         Larry Clark - Investor Relations for Power-One
         Tel.: +1 (310) 478-2700 ext. 29
         Email: Investor.Relations@Power-One.com

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