Renewable Energy Stocks Trading Alert; American Superconductor (NASDAQ:AMSC)
Trading up on News of Korea Electric Power Deal

Point Roberts WA-, 2011 (Investorideas.com renewable energy/green newswire)
Investorideas.com, a leader in cleantech investor research, issues a trading alert for American
Superconductor Corporation (NASDAQ:AMSC).The stocks is trading at $4.33, up 0.45 (11.60%)
2:16PM EDT, with a high on the day of $4.70.

Korea Electric Power Corporation (KEPCO), LS Cable & System and American Superconductor
Corporation (NASDAQ:AMSC) announced that the world’s longest distribution-voltage
superconductor cable system has been energized at the I’cheon substation located near the city
of Seoul. Powered by AMSC’s Amperium™ superconductor wire and installed in Korea Electric
Power Company’s (KEPCO) electricity grid, the 22.9 kV alternating current (AC) cable system
is capable of carrying approximately 50 megawatts of power. This is longest HTS cable in the
world to be energized in the grid utilizing second generation (2G) superconductor wire and is also
currently the longest distribution voltage superconductor power cable in operation.

“The energizing of the I’cheon substation has great historical significance and demonstrates
that Korean power electric technology is at a world-class level,” said Yup Heo, Executive Vice
President of KEPCO’s construction division. “Based on the technology and the know-how from
this installation, KEPCO will continue to develop transmission voltage superconductor power
cables and is securing the world’s top superconductor technology and market position.”

About American Superconductor (NASDAQ:AMSC )
AMSC offers an array of proprietary technologies and solutions spanning the electric power
infrastructure – from generation to delivery to end use. The company is a leader in renewable
energy, providing proven, megawatt-scale wind turbine designs and electrical control systems.
The company also offers a host of Smart Grid technologies for power grid operators that enhance
the reliability, efficiency and capacity of the grid, and seamlessly integrate renewable energy
sources into the power infrastructure. These include superconductor power cable systems,
grid-level surge protectors and power electronics-based voltage stabilization systems. AMSC’s
technologies are protected by a broad and deep intellectual property portfolio consisting of
hundreds of patents and licenses worldwide. More information is available at www.amsc.com.

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