Beacon Power Receives Certification for Smart Power M5 Inverter

 Beacon Power Receives Certification for Smart Power M5 Inverter System
from Underwriters Laboratories
[SolarDaily.com] WILMINGTON, Mass., Thursday December 11, 2:53 pm ET
Completed Production Units Ready for Immediate Shipment to
Distributors
Beacon Power Corporation (NASDAQ: BCON - News), a leader in
sustainable energy storage and power conversion systems, announced
that the Smart Power M5 system has been approved for listing by
Underwriters Laboratories (UL) in both the U.S. and Canada. Achieving
UL approval is the final step in making a product fully available for
commercial sale.

"Gaining UL approval for the Smart Power M5 is a significant
accomplishment, and one we believe the industry has been waiting for,"
said Bill Capp, Beacon Power president and CEO. "The notice we
received yesterday authorizes us to ship units with the UL label. The
entire Beacon team deserves credit for successfully bringing this
product through UL approval in a professional and timely manner."

The Smart Power M5 is designed for use in grid-connected solar power
applications, and addresses the needs of customers who have concerns
about the stability and reliability of the electrical grid. The Smart
Power M5 immediately converts to an independent battery back-up mode
when the grid fails, continuing to provide power to critical loads. It
is also the most compact, easy to install and efficient product in
this category.

About Underwriters Laboratories

Underwriters Laboratories Inc. (UL) is an independent, not-for-profit
product safety certification organization that has been testing
products for more than a century. UL has an undisputed reputation as
the leader in U.S. product safety and certification.

About Beacon Power Corporation

Beacon Power Corporation (NASDAQ: BCON - News) designs and develops
sustainable energy storage and power conversion solutions that provide
reliable electric power for the renewable energy, telecommunications,
distributed generation and UPS markets. Beacon's latest product is the
Smart Power M5, a 5-kilowatt power conversion system for grid-connect
solar power applications. The Smart Power M5 is a UL-approved,
"all-in-one" power conversion system incorporating multiple
high-performance components in one unit that delivers instantaneous
power in the event of a grid outage. Beacon is also known for its
advanced flywheel-based Smart Energy systems, designed to provide
reliable, environmentally friendly power quality solutions for
electric utility transmission and distribution and other applications.

For more information call 888-938-9112, or visit www.beaconpower.com.

Safe Harbor Statements under the Private Securities Litigation Reform
Act of 1995:

Material contained in this press release may include statements that
are not historical facts and are considered "forward-looking" within
the meaning of the Private Securities Litigation Reform Act of 1995.
These forward-looking statements reflect Beacon Power Corporation's
current views about future events and financial performances. These
forward-looking statements are identified by the use of terms and
phrases such as "believe," "expect," "plan," "anticipate," and similar
expressions identifying forward-looking statements. Investors should
not rely on forward-looking statements because they are subject to a
variety of risks, uncertainties, and other factors that could cause
actual results to differ materially from Beacon Power Corporation's
expectation. These factors include: a short operating history; a
history of losses and anticipated continued losses from operations; a
need to raise additional capital combined with a questionable ability
to do so; conditions in target markets; no experience manufacturing
any product on a commercial basis; the company has only recently
entered into the renewable energy market through its inverter
products, and hence, has only limited experience in this sector; no
commercial contracts for sales to date; the dependence of sales on the
achievement of product development and commercialization milestones;
the uncertainty of the political and economic climate of any foreign
countries into which Beacon hopes to sell, including the uncertainty
of enforcing contracts and the potential substantial fluctuation in
currency exchange rates in those countries; significant technological
challenges to successfully complete product development; dependence on
third-party suppliers; intense competition from companies with greater
financial resources; possible government regulation that would impede
the ability to market products; possible product liability claims and
the negative publicity which could result; any failure to protect
intellectual property; the possible need in the future to hire and
retain key executives, particularly in light of the substantial
workforce reductions during 2001 and 2002; the recent volatility in
the stock price of companies operating in the same sector; the power
of controlling shareholders and the limited ability of others to
influence the outcome of matters put to the vote of shareholders.
These factors are elaborated upon and other factors may be disclosed
from time to time in Beacon Power Corporation's filings with the
Securities and Exchange Commission. Beacon Power Corporation expressly
does not undertake any duty to update forward-looking statements.

Contact:

Beacon Power Corporation

Gene Hunt, 978-661-2825

hunt@beaconpower.com


Source: Beacon Power Corporation