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Advanced Energy^® and SunEdison^® Announce Commercial Agreement for Solaron^® Inverter Solutions

FORT COLLINS, Colo., December 3, 2009—Advanced Energy^® Industries, Inc. (NasdaqGM: AEIS) announced today that it has entered into a commercial agreement with SunEdison^®, a leading solar-energy services provider. The agreement includes Solaron^® grid-tie, photovoltaic (PV) inverters, as well as complete product life-cycle services.

“AE is honored to work with a premier solar-energy company such as SunEdison,” noted Dr. Hans Betz , president and CEO of Advanced Energy. “This commercial agreement is another important milestone for our PV inverter solutions, and demonstrates the value that our expertise brings to leading, utility-scale customers in the solar-energy marketplace.”

SunEdison’s vice president of engineering procurement and construction, Jason Stevens, noted, “SunEdison is proud to be working with Advanced Energy as one of our choice suppliers. Advanced Energy has an outstanding reputation with their high efficiency Solaron PV inverter line and we look forward to working with them under this new supply agreement.”

For more information on Advanced Energy 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 Ft. Collins, CO, with dedicated support and service locations around the world. For more information, go to www.advanced-energy.com