Advanced Energy® Utility Solar Inverters Selected for 150 MW Solar Power Plant by Zachry Industrial, Inc.

For more information, contact:

Advanced Energy^® Utility Solar Inverters Selected for 150 MW Solar Power Plant by Zachry Industrial, Inc.

FORT COLLINS, Colo., May 02, 2011—Advanced Energy Industries, Inc. (Nasdaq: AEIS), today announced that its Solaron^® PV inverters and SafeGuard^® service program have been selected to power a 150-megawatt project located in Arizona. The project was awarded to Advanced Energy by Zachry Industrial, Inc., a leading U.S. EPC provider. The Solaron PV inverters were selected for this project through a rigorous competitive bidding process.

"After evaluating multiple inverter options, we found Advanced Energy provided the leading product and service offering for the project," said Al Hood with Zachry Industrial, Inc. "We look forward to working with Advanced Energy on this momentous project which reflects Zachry's commitment to the solar market."

The project is slated to begin construction in mid-2011 and be completed in 2013. When completed, we believe the project will be one of the largest photovoltaic solar installations in North America with a planned output capacity that is currently larger than any solar PV project installed worldwide.

The project will utilize the Solaron 500kW inverters configured as 2MW PowerStation™ solutions and will be supported by Advanced Energy's SafeGuard Plus inverter uptime program.

"We are honored to be selected by Zachry for such a landmark utility-scale project," said Gregg Patterson, Executive Vice President and General Manager of Advanced Energy Renewables. "As the solar industry matures, project stakeholders recognize that high-performance, high-reliability products and services from a bankable partner like Advanced Energy provide maximum return on investment."

For more information on Advanced Energy's Solaron inverter solutions, please visit www.advanced-energy.com/renewables.

About Advanced Energy

Advanced Energy (Nasdaq: AEIS) is a global leader in innovative power and control technologies for high-growth, thin-film manufacturing and solar-power generation. Founded in 1981, 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.