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Advanced Energy^® Solaron^® Inverters Commissioned on Colorado State University’s 2 MW Solar Array

New Solar Plant Expected to Generate 10 Percent of Electricity Used at Foothills Campus

FORT COLLINS, Colo., Dec. 16, 2009—Advanced Energy Industries, Inc. (NasdaqGM: AEIS), today announced that its award-winning Solaron^® photovoltaic inverters were commissioned on Colorado State University’s (CSU) new, two megawatt solar power plant at its Foothills Campus. The Solaron products were selected for the new facility because of their record-setting efficiency rating as well as the company’s reputation for highly reliable products, service and support.

The 15 acre site is expected to be one of the largest solar installations at a U.S. university and is projected to produce more than 10 percent of the electricity required to power the Foothills Campus. The project is the result of a unique, public-private partnership between CSU, Fotowatio Renewable Ventures (FRV), a premier independent power producer, and Xcel Energy, a leading regional utility supplier. AMEC, an international engineering and project management company, is constructing the solar array. The facility started producing power in early December and is expected to be fully commissioned early in 2010.

Dr. Hans Betz, president and CEO of Advanced Energy, noted, “We’re proud to be working with these leading companies developing solar energy solutions to deliver clean, renewable energy to the Foothills Campus. We are confident that by delivering the highest efficiency available, our Solaron inverters will provide the maximum power harvest and the lowest levelized cost of energy (LCOE). CSU’s leadership in renewable energy is a great example for other universities and businesses across the country.”

For more information on Advanced Energy’s Solaron inverter solutions, please visit www.aesolaron.com.

About Advanced Energy

Advanced Energy is a global leader in innovative power and control technologies for high-growth, thin-film manufacturing and solar-power generation. Advanced Energy is headquartered in Fort Collins, Colorado, with dedicated support and service locations around the world. For more information, go to www.advanced-energy.com.

This news release may contain forward-looking statements that involve risks and uncertainties, which may cause actual results to differ materially from the statements made. Please refer to the company’s SEC reports for a listing of such factors.