Partnership to Deliver Integrated, Best-In-Class UPS-Flywheel Power Protection System

Columbus, OH and Chatsworth, CA - May 24, 2004 - Liebert Corporation, an Emerson Network Power company, and Pentadyne Power Corporation have signed an agreement through which Pentadyne’s Voltage Support Solution (VSS) flywheel power system will be integrated with Liebert UPS systems. Liebert will distribute the Pentadyne flywheel system through its network of representatives and will make the flywheel available as an option for the Liebert Series 610 and Liebert Npower UPS systems.

“This is an exciting opportunity. We are seeing increased interest in flywheel technology from our customers,” said Kevin Stoll, Vice President of Marketing for Liebert North America. “We evaluated the systems on the market and felt Pentadyne had by far the strongest offering. We will be able to offer our customers a reliable, easy-to-apply, best-in-class flywheel storage energy solution for battery-less ride through and battery hardening power quality systems.”

“This agreement brings two best-in-class systems together into a single solution that offers significant value to the marketplace,” said Paul Craig, President and CEO of Pentadyne Power. “We are very pleased to have Liebert, the market leader in large UPS systems, as our partner.”

Pentadyne's VSS flywheel power system provides a stable, reliable, low maintenance, extended-life DC voltage source to either replace or supplement batteries in UPS systems. During a grid disturbance, the VSS 120 can provide sufficient ride-through for an orderly system shutdown or until a standby engine-generator can come on-line. A single Model VSS 120 provides sufficient power 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:
Pentadyne, located in Chatsworth, California, 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. A number of leading venture capital groups and industry players back Pentadyne, 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, visit www.pentadyne.com.

About Liebert Corporation:
Liebert, an Emerson Network Power company, is the world leader in systems that protect the availability of computers and other sensitive electronics. Liebert delivers unparalleled protection of critical systems through a complete range of power, environmental and monitoring systems that are tailored to application requirements by a network of local representatives that average better than 16 years of experience in the industry. Liebert Global Services is the world’s largest service team dedicated to the maintenance and on-site repair of critical computer support systems. For more information on Liebert, visit www.liebert.com.

About Emerson Network Power:
Emerson Network Power is an Emerson business that provides a full spectrum of reliable power solutions, including inbound power, connectivity, power supplies, power systems and precision cooling, backed by the largest global services organization in the power industry. These Emerson companies serve the needs of telecommunications networks, data centers, health care and industrial facilities worldwide. For more information, visit www.emersonnetworkpower.com

Media Contact for Pentadyne

Greg Evans
WelComm, Inc.
(858) 279-2100
Fax: (858) 279-5400
Email: greg@welcomm.com

Media Contact for Liebert

Julie Russo
Fahlgren Mortine Public Relations
(614) 825-1746
Email: julie.russo@fahlgren.com