Hanwha SolarOne Enhances Production with New
Cell Technology

New technology improves production capabilities and cuts costs

Hanwha SolarOne Enhances Production with New Cell Technology

[Shanghai, China, 22 November, 2013] Hanwha SolarOne Co. Ltd. (the “Company”, or “Hanwha SolarOne”), a global photovoltaic provider of cost-competitive, high-quality solar photovoltaic modules, today announced the completed integration of new cell technology into its production processes. Through the implementation of this innovative new technology, known internally as ‘Project EStarII,’ Hanwha SolarOne is able to reduce silver paste consumption and optimize production processes
to enhance efficiency and cost saving.

“This is truly a production milestone for Hanwha SolarOne. With this new technology, we are now able to produce world-class solar cells at competitive costs,” said Jeong Eui Hong, Chief Technology Officer at Hanwha SolarOne. “We plan to leverage this technology to gradually increase the cell efficiency
of our multi-crystalline silicon wafers to more than 18.5 percent by the end of 2015.”

According to Hanwha SolarOne’s internal assessments, the new cell technology dramatically improves production capabilities. Products manufactured with the new technology are on average 0.2 to 0.25 percent more efficient, with module power gains of 3W to 5W on average. Moreover, this new technology reduces silver paste consumption by approximately 45 percent during production.

All products made with this cutting-edge technology meet Hanwha SolarOne’s stringent cell requirements as well as those for a number of international certifications.

For more information:

John Xi, Hanwha SolarOne
Senior Marketing Communication Manager
Tel: (Corporate) +86 21 38521521
Email: john.xi@hanwha-solarone.com

Hanwha SolarOne

Hanwha SolarOne Co., Ltd. (NASDAQ: HSOL) is one of the top 10 photovoltaic module manufacturers in the world, providing cost-competitive, high quality PV modules. It is a flagship company of Hanwha Group, one of the largest business enterprises in South Korea. Hanwha SolarOne serves the utility, commercial, government and residential markets through a growing network of third-party distributors, OEM manufacturers and system integrators. The company maintains a strong presence worldwide, with a global business network spanning Europe, North America, Asia, South America, Africa and the Middle East. As a responsible company committed to sustainability, Hanwha SolarOne is an active member of the PV Cycle take-back and recycling program.

For more information, visit: investors.hanwha-solarone.com

Hanwha Group

Hanwha Group, founded in 1952, is one of the Top-Ten business enterprises in South Korea
and a “FORTUNE Global 500” company. Hanwha Group has 56 domestic affiliates and 226 global networks in three major sectors: manufacturing and construction, finance, and services and leisure.
With more than 60 years track record of industrial leadership, Hanwha’s manufacturing and construction businesses encompass a broad range of fields from chemicals & materials, aerospace & mechatronics, total solar energy solutions, and global construction. The finance network, covering insurance, asset management and securities, is the second largest non-bank financial group in South Korea. The services and leisure sector offers premium lifestyle services with retail and resort businesses.

For more information, visit: www.hanwha.com

Safe-Harbor Statement

This press release contains forward-looking statements. These statements constitute “forward-looking” statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and as defined in the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as “will,” “expects,” “anticipates,” “future,” “intends,” “plans,” “believes,” “estimates” and similar statements. Among other things, the quotations from management in this press release and the Company’s operations and business outlook, contain forward-looking statements. Such statements involve certain risks and uncertainties that could cause actual results to differ materially from those in the forward-looking statements. Further information regarding these and other risks is included in Hanwha SolarOne’s filings with the U.S. Securities and Exchange Commission, including its annual report on Form
20-F. Except as required by law, the Company does not undertake any obligation to update any
forward-looking statements, whether as a result of new information, future events or otherwise.

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