ENER1's EnerDel Subsidiary to Deliver Technical Presentation on Lithium Ion Batteries for HEV at Advanced Automotive Battery Conference

Market Wire, March, 2007

Ener1, Inc. (OTCBB: ENEI), an alternative energy company, announced that its EnerDel subsidiary will be making a technical presentation on lithium ion battery development at the Advanced Automotive Battery Conference (AABC) in Long Beach, California taking place from May 15 - 18 this year. EnerDel is a Gold Level conference sponsor and is also exhibiting at the conference. Hiroyuki Yumoto, Director of Cell Development for EnerDel, will be making a presentation at the conference on "Li-Ion Battery Pack Systems for Hybrid Electric Vehicle (HEV) Applications." The AABC conference is attended by over 600 participants from all over the world, representing a strong cross section of the industry, including automotive customers, Tier 1 suppliers, battery developers and manufacturers, as well as leading academic and research institutions. To visit the AABC web site, go to: http://www.advancedautobat.com/AABC/index.html .

In a separate development, EnerDel announced that it delivered lithium ion battery cells for the next phase of testing by an independent laboratory. The batteries will be tested for high hybrid pulse power characterization, cold cranking, efficiency and lifetime performance. EnerDel expects that the test results will be available in late April 2007. EnerDel stated that the company expects that the performance of these cells will further improve on the results that were recently announced in February. In that announcement, EnerDel reported excellent test results for power-assist goal performance, including tests for static capacity, hybrid pulse power, self-discharge and thermal performance at various temperatures. EnerDel said the initial tests results show that its cells met and exceeded all established performance goals.

About Ener1, Inc.

Ener1, Inc. (OTCBB: ENEI) is an alternative energy technology company that is developing 1) lithium ion batteries for hybrid electric vehicles (HEV) at its 80.5% owned EnerDel subsidiary through corporate ventures and strategic partnerships with Delphi, ITOCHU and EnerStruct, 2) commercial fuel cell products through its EnerFuel subsidiary, and 3) nanotechnology-based materials and manufacturing processes for batteries and other applications at its NanoEner subsidiary. For more information, visit http://www.ener1.com and http://www.enerdel.com or call 954-556-4020.

Safe Harbor Statement

This release contains forward-looking statements within the meaning of the Federal Private Securities Litigation Reform Act of 1995 conveying management expectations as to the future based on plans, estimates and projections at the time the statements are made. The forward-looking statements contained in this press release involve risks and uncertainties, including, but not necessarily limited to: EnerDel's ability to succeed as a supplier of batteries to the hybrid electric vehicle and other markets; Ener1's ability to successfully develop and market proposed lithium battery, fuel cell and nanotechnology-based products and services; the degree of competition in the markets for lithium battery, fuel cell and nanotechnology-based products and services; Ener1's history of operating losses; the lack of operating history for the development stage Ener1 businesses; the need for additional capital; the dependency upon key personnel; and other risks detailed in filings made from time to time with the Securities and Exchange Commission. These risks and uncertainties could cause actual results or performance to differ materially from any future results or performance expressed or implied in the forward-looking statements included in this release. Ener1 undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise.

For further details contact: Jerry Herlihy Ener1, Inc. T: (954) 556-4020 e-mail: jherlihy@ener1.com Mercantile Ascendency NewsWire John Bryant 214-461-3417 jbryant@mercantileascendency.com For media inquiries: Victor Webb/Madlene Olson Marston Webb International T: (212) 684-6601 e-mail: marwebint@cs.com