mediarelease

MERRIMACK, N.H.–(BUSINESS WIRE)–May 6, 2008–GT Solar
Incorporated, a key global provider of a comprehensive range of
equipment, services and technology solutions to the solar power
industry, announced today that it has entered into a contract to
supply Nexolon Co., Ltd. of South Korea with DSS450 furnaces and
accessories worth approximately $8.8 million (US). Deliveries are
expected to be made over the next 5 months.

The DSS450 (Directional Solidification System) model furnace is GT
Solar’s newest and most technically advanced furnace. The furnace
enables solar panel producers to “grow” multi-crystalline silicon
ingots, which are processed into wafers and converted into solar cells
which produce electricity when exposed to sunlight. Multi-crystalline
wafers are a core component used in the production of solar panels
worldwide. GT Solar’s latest technology DSS450 furnace allows
producers to increase their silicon ingot output by approximately 30%
over previous furnace designs. Ingots produced annually from a DSS450
furnace are capable of providing enough electricity to power up to
1,000 average U.S. homes for one year.

GT Solar began shipments of its DSS line of furnaces in 2003.

“This represents GT Solar’s first DSS contract in South Korea, and
we look forward to helping our new customer, Nexolon, develop its
business and become a key player in the production of
multi-crystalline ingots,” said GT Solar CEO and President, Tom
Zarrella. “This contract is yet another example of GT Solar’s key role
in providing technology worldwide to meet the demand for solar
energy.”

Nexolon CEO Woo-Jeong Lee, noted: “We are delighted to have the
opportunity to work with GT Solar as we start to build our business to
meet solar energy demands in South Korea. We believe GT Solar has the
resources and know-how to assist us as we move forward.”

About Nexolon Co., Ltd.

Founded in 2007, Nexolon is based in Seoul, Korea and has
announced its plans to become a major supplier of monocrystalline and
multicrystalline silicon wafers to the solar industry. These silicon
wafers are thin sheets of crystalline silicon material principally
used to produce solar cells. Nexolon intends to form strategic
partnerships with reputable suppliers such as GT Solar and its
customers. Nexolon’s headquarter facility is located in Seoul, Korea,
and its manufacturing plant is currently being constructed in the
Iksan Industrial Complex in Iksan City of JeonBuk Province, Korea. For
more information, visit www.nexolon.com.

About GT Solar Incorporated

GT Solar Incorporated, based in Merrimack, NH (USA), is a wholly
owned subsidiary of GT Solar International, Inc., and is a key global
provider of ingot casting furnaces, polysilicon reactors and turnkey
manufacturing solutions across the photovoltaic supply chain. For more
information, go to www.gtsolar.com.

Forward-Looking Statement

This press release contains forward-looking statements that are
subject to risks and uncertainties. These statements are indicated by
words such as “expect,” “estimate,” “or similar expressions. In
particular, this press release contains forward-looking statements
about the expected future sales of $8.8 million from the contract
executed with Nexolon Co., Ltd. and the expected timing of those
deliveries over the next five months. These statements are based upon
information available to GT Solar’s management as of the date hereof.
Actual results may differ materially from the anticipated results
because of certain risks and uncertainties, including, but not limited
to, the failure by either party to fulfill its obligations under such
contract. GT Solar undertakes no obligation to update or revise
forward-looking statements to reflect changed assumptions, the
occurrence of unanticipated events or changes to future operating
results over time, except as required by law.

–30–DC/bo*

CONTACT: GT Solar
Fred Kocher, 603-498-5221
or
Hill & Knowlton
Jessica Anderson, 212-885-0492

KEYWORD: NEW HAMPSHIRE
INDUSTRY KEYWORD: HARDWARE CHEMICALS/PLASTICS MARKETING AGREEMENTS
SOURCE: GT Solar Incorporated

Copyright Business Wire 2008

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