Chatsworth, Calif. - October 7, 2004 - Pentadyne Power Corporation announced today that it earned an Underwriters Laboratories Inc. (UL) listing for its new Pentadyne Voltage Support Solution™ (VSS) flywheel power system.

UL, an internationally recognized leader in safety testing of products, has determined that the Pentadyne Voltage Support Solution™, VSS 120, meets the requirements for a UL Listing. The VSS 120 was evaluated and tested to the applicable requirements of: UL Standard for Safety for Industrial Control Equipment, UL 508; UL Standard for Safety for Electric Motors, UL 1004; and UL Standard for Safety for Engine-Generator Assemblies for Use in Recreational Vehicles, UL 1248. The unit will bear the label “UL Listed” and “Flywheel Power System.” The product can be found on UL’s online Certifications Directory (available through www.ul.com) by using the search keywords: VSS120; Pentadyne; Flywheel, or motor generator sets.

“We are very pleased to have our VSS 120 system tested, evaluated, and certified by such a prestigious safety organization,” said Paul Craig, CEO of Pentadyne Power Corporation. “This UL listing will strengthen our product’s acceptance both domestically and internationally, as many customers require such third-party recognition as a critical factor in making a purchasing decision.”

Pentadyne’s flywheel system provides a stable, reliable, low maintenance, extended-life DC voltage source to either replace or supplement batteries in UPS systems. The VSS 120 can completely eliminate the need for UPS batteries in many applications by providing sufficient ride-through for an orderly system shutdown or until a standby engine-generator can come on-line. To help protect batteries, the Model VSS 120 minimizes battery discharge “whiplash” effects commonly experienced with each use, thus improving battery reliability and preserving battery capacity for occasions that demand a longer back-up time. When connected to most North American UPS models, a single Model VSS 120 provides sufficient energy to support loads up to 150 kVA. Multiple VSS units in parallel provide economic ride-through for power levels up to 2 MW.

About Pentadyne Power Corporation (www.pentadyne.com)
Pentadyne designs, manufactures and markets advanced flywheel power systems that provide high quality, reliable power for power quality sensitive customers, urban rail power recycling, and urban transportation. Whether integrated into other products or used alone, Pentadyne's flywheel systems provide an economic, long lasting, low maintenance, lightweight and environmentally sound power solution for a range of applications. Pentadyne is backed by leading venture capital groups and industry players including Nth Power, DTE Energy, MVV Innovations, Sempra Energy, Electricité de France and Ben Rosen (co-founder of Sevin Rosen and Chairman emeritus of Compaq Computer).

For More Information Contact:

David Townley
Senior Vice President Marketing and Sales
Pentadyne Power Corporation
20750 Lassen Street
Chatsworth, CA 91311
(818) 350-0370 x 206
Fax (818) 350-0382
Email: DavidTownley@pentadyne.com

Greg Evans (Agency Support)
President, Account Executive
WelComm, Inc.
7975 Raytheon Rd., Ste 340
San Diego, CA 92111
(858) 279-2100
Fax: (858) 279-5400
Email: Greg@welcomm.com