Power-One Introduces New 400kW Modular Inverter System for Commercial Solar Market

"Designed with the specific needs of commercial plant operators and installers in mind, the new AURORA PVI-400.0-TL offers more power than our previous central inverter systems on the same footprint," said Paolo Casini, vice president of product marketing at Power-One.

ORLANDO, Fla., Sept. 11, 2012 -- SOLAR POWER INTERNATIONAL

2012 -- Power-One, Inc. (Nasdaq:PWER), a leading provider of renewable
energy and energy-efficient power conversion and power management solutions,
today announced its new modular inverter system, the AURORA PVI-400.0-TL.

This extremely scalable system is an evolution of Power-One's previous
central inverters, which are based on 55kW modules. By increasing the power
of each inverter to up to 67kW, the AURORA PVI-400.0-TL reaches an output of
up to 400kW. The output voltage has been increased to 380V, thereby further
limiting losses. Like the previous versions, each inverter module can be
configured in multi-master for up to six independent MPPT or in master slave
with a single MPPT. This helps to reduce losses due to array mismatch, thus
improving energy harvesting, and supports short MTTR with field swappable
modules.

"Designed with the specific needs of commercial plant operators and
installers in mind, the new AURORA PVI-400.0-TL offers more power than our
previous central inverter systems on the same footprint," said Paolo Casini,
vice president of product marketing at Power-One.
"Additionally, up to five PVI-400 inverters can be paralleled on a single
transformer secondary winding to achieve a skid size block of 2MW."

Moreover, the inverter system reaches 98 percent of peak energy and offers a
maximum input voltage of up to 1,000V, which reduces the DC distribution
losses for large-scale PV plants. Each inverter is equipped with a number of
system protections, such as DC input, reverse polarity protection,
overvoltage protection devices and AC breakers.

Due to the modular design, installation and maintenance are effortless.
All the DC/AC converters can be accessed from the front, allowing for easy
accessibility to all other critical parts and thereby further simplifying
maintenance procedures. To significantly reduce the on-site wiring and
testing operations, Power-One delivers the AURORA PVI-400.0-TL units
pre-configured and pre-tested.

The inverter system offers two independent RS-485 communication interfaces
for inverter and intelligent string combiner monitoring. The AURORA
PVI-400.0-TL fulfills all the necessary requirements for safety and grid
management which makes it compatible for large scale commercial and utility
markets.

To learn more about Power-One's inverter products for the United States as
well as its global portfolio, please 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.

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