Power-One Announces New Commercial and Utility Scale Products Receive Certification to UL 1741

Power-One Announces New Commercial and Utility Scale Products Receive
Certification to UL 1741

  *TRIO 20.0kW and 27.6kW commercial string inverters
  *ULTRA 780kW, 1.17MW and 1.56MW central inverters

CAMARILLO, Calif., Jan. 24, 2013 (GLOBE NEWSWIRE) -- Power-One, Inc.
(Nasdaq:PWER), a leading provider of renewable energy and energy-efficient
power conversion and power management solutions, today announced that its new
ULTRA 780kW, 1.17MW and 1.56MW central inverters and TRIO 20.0kW and 27.6kW
commercial string inverters have successfully received certification to UL
1741 and IEEE 1547 standards for use in the U.S. market. The ULTRA and TRIO
products are shipping commercially in Europe and will begin shipping in the
first quarter in the U.S.

"We are pleased that our liquid-cooled ULTRA series of central inverters and
the new TRIO string inverters designed for the U.S. commercial market have
received certification to UL 1741, as this validates their safe operation for
commercial and utility scale PV installations," said Alex Levran, President,
Renewable Energy Solutions Group, Power-One. "The ULTRA, with its game
changing technology designed to drive down the levelized cost of energy, began
shipping in the fourth quarter of 2012 and has commissioned sites in Italy,
Germany, Greece and the U.K."

"Our TRIO product family of inverters for the commercial market has been a
great success in Europe, shipping nearly 1.3 GW in 2012, its first full year
in the market," continued Levran. "And, as the first 1000v string inverter in
the U.S., it is set to redefine the commercial segment as we know it today."

Power-One has focused on maximizing the return on investment for PV commercial
and utility plant owners through maximizing energy harvesting, lowering the
total plant investment and minimizing maintenance costs.The Power-One maximum
power point tracking (MPPT) algorithm ensures that the Company's inverters
operate at the absolute maximum power point of the array. The ULTRA and TRIO's
wide input voltage range provides maximum energy harvesting over a wide range
of module temperature and insolation levels.In addition, both inverters are
the only products in their respective class that have NEMA 4x environmental
ratings.

To learn more about Power-One's inverter products for the United States as
well as its global portfolio, please contact Dave Wojciechowski at
dave.wojciechowski@power-one.comor visit
http://www.power-one.com/renewable-energy. 

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
www.Power-One.com.

The Power-One, Inc. logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=7338

CONTACT: Media Contact:
         Chris Lawson
         Power-One, Inc.
         chris.lawson@power-one.com
        
         Sales Contact:
         Dave Wojciechowski
         Power-One, Inc.
         dave.wojciechowski@power-one.com

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