FORT COLLINS, Colo., June 23, 2009—Advanced Energy Industries, Inc. (NasdaqGM: AEIS) today announced that its expanding portfolio of Solaron^® photovoltaic (PV) inverters has again achieved record-setting ratings in the California Energy Commission (CEC) list of approved inverters. Last month, AE inverters exceeded their own record of 97 percent CEC-weighted efficiency by posting a 97.5 percent CEC efficiency rating—an achievement unmatched by any other line of grid-tie, commercial and utility-scale inverters.

Solaron 333 kW models, which were introduced to the market in 2007, have now surpassed their original CEC-weighted efficiencies of 97 percent to be rated at 97.5 percent, with peak efficiencies of 98.2 percent. In addition, the newly introduced Solaron 500 kW utility-scale inverter has been rated at 97.5 CEC-weighted efficiency, with a recorded peak efficiency of 98.5 percent.

The CEC is the leading North American agency to review, compile and approve inverters for commercial use. The CEC posts specifications for hundreds of inverters that have been approved by certified testing facilities. Commercial and utility-scale inverters with current CEC ratings can be found at: http://www.gosolarcalifornia.org/equipment/inverter.php. When graphed as shown, the data from the above website indicates that Solaron inverters rank highest in both efficiency and power output (graph was generated by AE, using the CEC’s 462 data points posted March 31, 2009).

President and CEO of Advanced Energy Industries, Inc., Dr. Hans Betz, noted, “LCOE (levelized cost of electricity) is a primary measure of PV-system success. The unsurpassed LCOE of AE’s Solaron portfolio is directly driven by its superior efficiency and competitive cost of operation.”

Advanced Energy is a global leader in innovative power and control technologies for high-growth, thin-film manufacturing and solar-power generation. Specifically, AE targets solar grid-tie inverters, solar cells, semiconductors, flat panel displays, data storage products, architectural glass and other advanced applications.

AE’s solutions portfolio includes precise, flexible power systems; reliable gas and liquid flow-management systems; accurate thermal instruments and comprehensive global support services. Leveraging this portfolio and technology leadership, AE creates solutions aimed at maximizing process impact, improving productivity and lowering cost of ownership for its customers, including original equipment manufacturers (OEMs) and end-users around the world.

AE operates in regional centers in North America, Asia and Europe and offers global sales and support through direct offices, representatives and distributors. Founded in 1981, AE is a publicly held company traded on Nasdaq Global Market under the symbol AEIS. For more information, go to www.advanced-energy.com

Advanced Energy^®, RPT™, SafeGuard^SM and Solaron^® are trademarks and service marks of Advanced Energy Industries, Inc.