FuelCell Energy Announces Sale of a Stationary Fuel Cell Power Plant to Cleanly and Efficiently Power a London Office Tower

20 Fenchurch Fuel Cell Installation Supports City of London Low Carbon Zone Program

DANBURY, Conn., Dec. 4, 2012 -- FuelCell Energy, Inc.

(Nasdaq:FCEL), a global leader in the design, manufacture, operation
and service of ultra-clean, efficient and reliable fuel cell power
plants, today announced that FuelCell Energy Solutions, GmbH has sold a
stationary fuel cell power plant for installation at the 20 Fenchurch
office development in London, England. The ultra-clean and efficient
power generation profile of the fuel cells will facilitate clean air
permitting and support London's carbon reduction targets. FuelCell
Energy Solutions (FCES) will manufacture the power plant. Under a
service contract, FCES will also operate and maintain the power plant
from a European-based operations center that is staffed 24 hours a day,
seven days a week.

The 38 story, 690,000 square foot office building is being developed by
Canary Wharf Group, PLC and Land Securities PLC. The building utilizes
a distinctive design that widens as the height increases, providing a
smaller footprint and correspondingly larger public space at street
level and additional floor space for lease on the upper floors. The
Direct FuelCell(R) (DFC(R)) power plant will provide electricity and
heat in a combined heat and power (CHP) configuration with high
temperature heat provided to an absorption chiller for cooling and
lower temperature heat for facility and hot water heating. The fuel
cell will provide an electrical output of 300 kilowatts (kW), which is
adequate to power almost 800 average sized UK households and thermal
output of more than 300 kW.

"The high efficiency of the stationary fuel cell power plant is very
important for this building, from both an economical as well as
sustainability viewpoint," said Paul Mutti Executive Director Canary
Wharf Contractors Ltd. "The design and construction of the building
incorporates the latest advances in efficiency and conservation to
minimize the building's environmental impact, including re-use of the
demolition material from the prior building, utilization of solar
shading and window glazing that conserves energy, and the fuel cell
power plant that economically generates both electricity and heat with
virtually no emissions."

"The fuel cell power plant is at the heart of the building's
sustainability strategy and will be the first installation of its type
in the City of London's Square Mile," commented

Neil Pennell, Head of
Sustainability and Engineering, Land Securities. "Having the
opportunity to run the plant on a day-to-day basis in this landmark
building will provide us with a great insight into the future potential
of this technology to reduce carbon emissions and virtually eliminate
the emission of pollutants in commercial office building applications."

The DFC power plant supports the targets established by the Mayor of
London to supply one quarter of London's energy from decentralized
sources and reduce carbon dioxide (CO2) emissions by 60 percent by
2025, supporting the Mayor's vision for London to be the greenest, big
city in the world. Over one year of power production, the fuel cell
power plant will prevent the emission of more than 40,000 pounds of
pollutants including nitrogen oxide (NOx), sulfur dioxide (SOx) and
particulate matter (PM) compared to conventional combustion-based power
generation, which is equivalent to removing 340 cars from the road. The
high efficiency of the fuel cell power generation process reduces CO2
emissions compared to combustion-based power generation and the
combined heat and power (CHP) configuration further drives efficiency.

The power plant will prevent the emission of 1,800 tons of CO2 over the
course of one year when compared to conventional combustion-based power
generation, which is equivalent to removing 325 cars from the road.

"This marquee location in central London illustrates the advantages of
on-site fuel cell power generation that efficiently generates power in
an environmentally friendly process," said Chip Bottone, President and
Chief Executive Officer FuelCell Energy, Inc. and Managing Director,
FuelCell Energy Solutions, GmbH. "This power plant is a European
solution for providing ultra-clean distributed power generation as it
utilizes European design and content along with a European based service organization."

FCES, with its German manufacturing base, is the sales, manufacturing and
service business for the European Served Area for FuelCell Energy,
Inc. FCES is a joint venture between Fraunhofer IKTS and FuelCell Energy, Inc.

The DFC300-EU will be installed within the office building as the quiet
operation and virtual lack of pollutants from fuel cells is well-suited
for populated areas. The power generation process of the fuel cell uses
an electrochemical reaction rather than combustion, which very
efficiently converts fuel into clean electricity and heat suitable for
generating steam. Due to the lack of combustion, the fuel cells
generate power that is virtually absent of pollutants. This
electrochemical power generation process is quiet and free of
vibrations, allowing for a normal conversational tone next to an
operating fuel cell.

Generating both electricity and heat from the same unit of fuel reduces
fuel costs and drives efficiency. Fuel cells can achieve up to 90
percent efficiency when the heat is utilized in a CHP configuration.
The heat for this fuel cell installation will be used for facility
heating and cooling, resulting in maximum fuel efficiency and cost
savings with an estimated overall efficiency above 85 percent. The fuel
cell power plant will be installed in 2013 and commissioned for the
building completion in 2014.

About FuelCell Energy Solutions, GmbH

FuelCell Energy Solutions develops, manufactures, sells, installs,
services and operate stationary fuel cell power plants that efficiently
and economically generate electricity and usable high quality heat.
Administrative offices are located in Dresden, Germany and
manufacturing operations are located in Ottobrunn, Germany. Continuous
power

generated at the point of use with the virtual absence of
pollutants supports energy security and power reliability as well as
sustainability initiatives. Ultra-Clean baseload distributed generation
is attractive to electric utilities, universities, hospitals,
government facilities, industrial operations and other locations with
significant power needs. Direct FuelCell(R) (DFC(R)) power plants are
fuel flexible, capable of operating on clean natural gas or renewable
biogas. For more information please visit our website at www.fces.de

About FuelCell Energy, Inc.

Direct FuelCell(R) power plants are generating ultra-clean, efficient
and reliable power at more than 50 locations worldwide. With
approximately 300 megawatts of power generation capacity installed or
in backlog, FuelCell Energy is a global leader in providing ultra-clean
baseload distributed generation to utilities, industrial operations,
universities, municipal water treatment facilities, government
installations and other customers around the world. The Company's power
plants have generated more than one billion kilowatt hours of
ultra-clean power using a variety of fuels including renewable biogas
from wastewater treatment and food processing, as well as clean natural
gas. For more information please visit our website at
www.fuelcellenergy.com

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