National Press Release

NEW YORK, May 4 /PRNewswire-FirstCall/ -- Ener1, Inc. (Nasdaq: HEV), developer and manufacturer of advanced lithium-ion batteries to power the next generation of hybrid and electric vehicles, will release its first quarter results for 2009 on Monday, May 11, 2009 after the market close. Management will conduct a conference call on the same day at 5:00 p.m. Eastern Daylight Savings Time, to discuss the company's results and strategic outlook for 2009.

The call is being webcast by Thomson Financial and can be accessed on the home page of Ener1's website at http://www.ener1.com.

To participate in the conference call, please dial +888.713.4214 from within the United States, or +617.213.4866 from outside the United States. The participant pass code is 69859156.

Participants are urged to dial into the call at least ten minutes prior to the call to register, or may pre-register for the call at: http://tinyurl.com/cut46u

Pre-registrants will be issued a pin number to use when dialing into the live call which will provide quick access to the conference and will bypass the operator upon connection.

A recording of the call will be available until May 18, 2009. To access the recording, please dial +888-286-8010 from within the United States, or +617-801-6888 from outside the United States. The participant pass code is 35493981.

About Ener1, Inc:

Ener1 develops and manufactures compact, high performance lithium-ion batteries to power the next generation of hybrid and electric vehicles. The publicly traded company (Nasdaq: HEV) is led by an experienced team of engineers and energy system experts at its EnerDel subsidiary located in Indiana. EnerDel has developed proprietary battery systems based on technology originally pioneered with the assistance of the Argonne National Lab.

Ener1 is seeking to become the first company to mass-produce a cost-competitive lithium-ion battery for hybrid and electric vehicles. Demand for battery solutions is being driven by a need to reduce dependence on oil as well as growing concern about vehicle emissions. In addition to the automobile market, applications for Ener1 lithium-ion battery technology include medical, military, aerospace, electric utility and other growing markets.

Major shareholders of Ener1 include Ener1 Group, Inc., a privately held, global investment and advisory firm, and ITOCHU Corporation, a Japanese trading company and distributor of manufacturing equipment essential to lithium-ion battery production. ITOCHU has annual revenue of approximately $90 billion and offices in more than 80 countries. Ener1 has also received funding from a growing number of institutional investors.

In addition to battery technology, Ener1 develops commercial fuel cell products through its EnerFuel subsidiary and nanotechnology-based materials and manufacturing processes for batteries and other applications through its NanoEner subsidiary.

    INVESTOR RELATIONS CONTACT
    Rachel Carroll
    VP Corporate Communications
    P: 212 920 3500 x. 105
    E: rcarroll@ener1.com

SOURCE Ener1, Inc.