Exhibit 31.2
 CERTIFICATION OF CHIEF FINANCIAL
OFFICER
 PURSUANT TO RULE 13A-14 AND
15D-14
 OF THE SECURITIES EXCHANGE ACT OF
1934
 
 I, Gerard Herlihy,certify that:
  1) I have reviewed this annual report on
Form 10-K of Ener1, Inc.;
 
 2) Based on my knowledge, this
reportdoes not contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by
thisreport;
 
 4) The registrant’s other certifying officer and I
areresponsible for
establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial
reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))for the
registrant and have:
 
 a) Designed such disclosure controls and
procedures, or caused such disclosure controls and procedures to be designed
under our supervision, to ensure that material information relating to the
registrant, including its consolidated subsidiaries, is made known to us by others
within those entities, particularly during the period in which this report is
being prepared;
 
 b)Designed such
internal control over financial reporting, or caused such internal control over
financial reporting to be designed under our supervision, to provide reasonable
assurance regarding the reliability of financial reporting and the preparation
of financial statements for external purposes in accordance with generally
accepted accounting principles;
 
 c) Evaluated the effectiveness of the
registrant’s disclosure controls and procedures and
presented in this report our conclusions about the effectiveness of the
disclosure controls and procedures, as of the end of the period covered by this
report based on such evaluation; and
 
 d) Disclosed in this report any change
in the registrant’s internal control over financial
reporting that occurred during the registrant’s most recent fiscal quarter (the
registrant’s fourth fiscal quarter in the case of
an annual report) that has
materially affected, or is reasonably likely to materially affect, the
registrant’s internal control over financial
reporting; and
 
 5) The registrant’s other certifying officer and I have
disclosed, based on our most recent evaluation of internal controlover financial reporting, to the
registrant’s auditors and the audit committee of
registrant’s board of directors (or persons
performing the equivalent functions):
 
 a) All significant deficiencies and
material weaknesses in the design or operation of internal control over financial reporting
which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize
and report financial information; and
 
 b) Any fraud, whether or not material,
that involves management or other employees who have a significant role in
the registrant’s internal control over financial
reporting.
 
 Date:June23, 2009
                
                /s/ Gerard
      HerlihyBy: Gerard
      Herlihy
                Title: Chief Financial
      Officer
                (Duly Authorized Principal
      Financial and
                Accounting Officer and Duly
      Authorized Officer)