Photo Release -- Exchange Testing Program Strengthens Cooperation Between Power-One and Phono Solar

Photo Release -- Exchange Testing Program Strengthens Cooperation Between
Power-One and Phono Solar

Program Designed to Ensure Optimal Compatibility, Quality, and Performance of
the Companies' Products

CAMARILLO, Calif., April 16, 2013 (GLOBE NEWSWIRE) -- Power-One, Inc.
(Nasdaq:PWER), a leading global manufacturer of renewable energy,
energy-efficient power conversion and management solutions and Phono Solar, a
global renewable energy solutions manufacturer, today announced the beginning
of an Exchange Testing Program.

Exchange Testing Program
 Mr. Jibo Cai Chairman of Phono Solar
 and Mr. Alex Levran President of
 Power-One's Renewable Energy Solutions
 at Phono Solar's "Discovery 2013"
 annual meeting.

A photo accompanying this release is available at

The program was finalized at Phono Solar's "Discovery 2013" annual meeting
earlier this year, and will involve both parties exchanging products for
review and inspection in their respective testing facilities. Last November,
Power-One signed a 'Global Strategic Cooperation Agreement' with Phono Solar
for the development of new photovoltaic (PV) systems worldwide using Power-One
inverters and monitoring systems exclusively. The agreement ensures
cooperation between the two brands in their product lines, sales and marketing
channels, research and development capabilities and project resources.

Power-One will exchange three types of inverters in the program and Phono
Solar will exchange its 5kW PV modules. The two parties will test each other's
products in their own indoor labs and outdoor testing facilities. The program
is expected to help improve product reliability, compatibility and

Mr. Alex Levran, President of Power-One's Renewable Energy Solutions Division,
said: "This program is designed to ensure our products work together to
optimize their compatibility, quality and performance. Having established our
strategic alliance last year, this exchange testing program is the next step
in the evolution of our partnership to ensure we provide our customers with
the best performing products in the industry."

Mr. Jibo Cai, Chairman of Phono Solar, said: "This new program is an evolution
of our agreement with Power-One, demonstrating our mutual trust and desire to
work together. Our package solution, including Phono Solar modules and
Power-One inverters, has been welcomed by our customers. We are confident of
the future of this cooperation and through the Exchange Testing Program we
expect to continue ensuring our commitment to the market as a key component

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

About Phono Solar

Phono Solar Inc. is a global renewable energy solutions manufacturer. Phono
Solar designs, manufactures and delivers solar and wind products for both on
and off-grid use. With operations in North America, Asia Pacific and Europe,
Phono Solar provides its partners with high-quality, competitively priced PV
modules that are among the industry leaders in terms of efficiency and

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 or through the SEC's ElectronicData Gathering and
Analysis Retrieval System (EDGAR) at Power-One undertakes no
obligation to publicly update or revise any forward-looking statement.

CONTACT: Power-One Contacts:
         For Press Inquiries, please contact
         Chris Lawson, Global Director, Marketing Communications
         Tel.: +1 480 643 1758
         For Investor Relations, please contact
         Larry Clark - Investor Relations for Power-One
         Tel.: +1 310 478 2700 ext. 29
         Phono Solar Contacts:
         For Press Inquiries, please contact:
         Matthew Herring
         +33 1 550 21515
         Christina Green
         +33 1 550 21467

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