Capstone Completes Underwriters Laboratories (UL) Scheduled Testing of the C200 Product

CHATSWORTH, Calif., June 1, 2009 (GLOBE NEWSWIRE) -- Capstone Turbine Corporation (www.capstoneturbine.com) (Nasdaq:CPST), the world's leading clean technology manufacturer of microturbine energy systems, today announced that it has completed Underwriters Laboratories (UL) scheduled testing of its C200 MicroTurbine product in accordance with UL 2200 and UL 1741.

Compliance testing for UL 2200 Standard for Stationary Engine Generator Assemblies evaluates the use of stationary engine generator assemblies intended for installation and use in ordinary locations. These requirements are designed to assess risk of fire, electric shock, or injury to persons. Testing covers several National Fire and Protection Agency (NFPA) standards including NFPA-110 Standard for Emergency and Standby Power Systems. In addition to system design and individual component evaluations, the C200 MicroTurbine product was subjected to rain and thermal environment tests including operation in hot and cold temperature extremes.

The C200 product was also tested to UL 1741 Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use with Distributed Energy Resources. UL 1741 requirements cover products intended for use in stand-alone (not grid-connected) or utility-interactive (grid-connected) power systems. Testing evaluates electrical safety and built-in protective relay functions. Products covered by these requirements are intended to be installed in accordance with the NFPA 70 National Electrical Code, IEEE 1547 Standard for Interconnecting Distributed Resources with Electric Power Systems, and IEEE 519 Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems.

Capstone has already received certification for UL 1998 Standard for Safety Software in Programmable Components. These requirements apply to non-networked embedded microprocessor software whose failure is capable of resulting in a risk of fire, electric shock, or injury to persons. Software programs are evaluated for the development process used to capture errors, microelectronic fault detection that prevents the normal execution of the program, and failure of the program to perform its intended function.

"This is an important milestone in the commercialization of the C200 product," said Jim Crouse, Capstone's Executive Vice President of Sales and Marketing. "Testing to the UL standards confirms the robustness of our product and affirms that our product meets many of the local building code requirements that help our customers reduce installation time and cost."

"We are pleased to have completed this final milestone required under the C200 Development and License Agreement with UTC Power Corporation," said Darren Jamison, Capstone's Chief Executive Officer.

About Capstone Turbine

Capstone Turbine Corporation (www.capstoneturbine.com) (Nasdaq:CPST) is the world's leading producer of low-emission microturbine systems and was the first to market commercially viable microturbine energy products. Capstone Turbine has shipped over 4,000 Capstone MicroTurbine(r) systems to customers worldwide. These award-winning systems have logged millions of documented runtime operating hours. Capstone Turbine is a member of the U.S. Environmental Protection Agency's Combined Heat and Power Partnership, which is committed to improving the efficiency of the nation's energy infrastructure and reducing emissions of pollutants and greenhouse gases. A UL-Certified ISO 9001:2000 certified company; Capstone Turbine is headquartered in the Los Angeles area with sales and/or service centers in the New York metro area, Mexico City, Nottingham, Shanghai, Singapore and Tokyo.

"Capstone Turbine Corporation" and "Capstone MicroTurbine" are registered trademarks of Capstone Turbine Corporation. All other trademarks mentioned are the property of their respective owners.

The Capstone Turbine Corporation logo is available at https://www.globenewswire.com/newsroom/prs/?pkgid=6212

This press release contains "forward-looking statements," as that term is used in the federal securities laws, about the advantages of compliance with UL standards. Forward-looking statements may be identified by words such as "expects," "objective," "intend," "targeted," "plan" and similar phrases. These forward-looking statements are subject to numerous assumptions, risks and uncertainties described in Capstone's filings with the Securities and Exchange Commission that may cause Capstone's actual results to be materially different from any future results expressed or implied in such statements. Capstone cautions readers not to place undue reliance on these forward-looking statements, which speak only as of the date of this release. Capstone undertakes no obligation, and specifically disclaims any obligation, to release any revisions to any forward-looking statements to reflect events or circumstances after the date of this release or to reflect the occurrence of unanticipated events.

CONTACT:  Capstone Turbine Corp.
          Investor and investment media inquiries:
          818-407-3628
          ir@capstoneturbine.com

Released June 1, 2009