WOOD DALE, Ill., March 13, 2013 (GLOBE NEWSWIRE) -- Power Solutions International, Inc. (OTCBB:PSIX), a leader in the design, engineering and manufacture of emissions-certified alternative-fuel and conventional power systems, today announced that Chief Executive Officer Gary Winemaster, Chief Operating Officer Eric Cohen, and Chief Financial Officer Daniel Gorey will present at the 25^th Annual ROTH Conference at the Ritz-Carlton Hotel in Laguna Niguel, California. The formal presentation will take place on March 18^th at 2:30 PM PDT. The conference is invitation-only for ROTH clients, but a simultaneous live webcast of the presentation will be available on the Investor Relations section of the Company's website at http://www.psiengines.com. The webcast will be archived on the Company's website for 90 days. Please contact your ROTH representative for registration information and to schedule a meeting with the company.

About Power Solutions International, Inc.

Power Solutions International, Inc. (PSI) is a leader in the design, engineering and manufacture of emissions-certified, alternative-fuel power systems. PSI provides integrated turnkey solutions to leading global original equipment manufacturers in the industrial, off- and on-road markets. The company's unique in-house design, prototyping, engineering and testing capacities allows PSI to customize clean, high-performance engines that run on a wide variety of fuels including natural gas, propane, biogas, diesel, gasoline, or hybrid systems.

PSI develops and delivers complete .97 to 22 liter power systems, including the new 8.8 liter engine aimed at the industrial and on-highway markets including; medium duty fleets, delivery trucks, school buses and garbage/refuse trucks. PSI power systems are currently used worldwide in power generators, forklifts, aerial lifts, and industrial sweepers, as well as in oil and gas, aircraft ground support, agricultural and construction equipment.

About ROTH Capital Partners, LLC

ROTH Capital Partners, LLC (ROTH), is a relationship-driven investment bank focused on serving emerging growth companies and their investors. As a full-service investment bank, ROTH provides capital raising, M&A advisory, analytical research, trading, market-making services and corporate access. Headquartered in Newport Beach, CA, ROTH is privately-held and employee owned, and maintains offices throughout the U.S. and Hong Kong. For more information on ROTH, please visit www.roth.com.

CONTACT: Power Solutions International, Inc.Dan Gorey

         Chief Financial Officer

         +1 (630) 451-2290

         dan.gorey@psiengines.com



         ICR, LLCGary Dvorchak

         Senior Vice President

         +1 (310) 954-1123

         gary.dvorchak@icrinc.com

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