Exhibit 5


                                    Exhibit 5

May 26, 2005

Enova Systems, Inc.
19850 South Magellan Drive
Torrance, CA 90502

         Re:    Registration Statement on Form S-8
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Ladies and Gentlemen:

We have assisted Enova Systems,  Inc., a California corporation (the "Company"),
in connection with the registration under the Securities Act of 1933, as amended
(the "Act"),  of an additional  20,000,000 shares of the Company's Common Stock,
no par value (the "Shares"), issuable under the Company's 1996 Stock Option Plan
(the "Plan"),  pursuant to the Company's Registration Statement on Form S-8 (the
"Registration   Statement")  to  be  filed  with  the  Securities  and  Exchange
Commission (the "Commission").

         In rendering  the  opinions  hereinafter  expressed,  we have made such
legal and factual  examinations  and  inquiries,  including  an  examination  of
originals or copies  certified or otherwise  identified to our  satisfaction  as
being  true  reproductions  of  originals,  of  all  such  documents,   records,
agreements and other instruments,  including the Registration  Statement,  as we
have deemed necessary and appropriate for the purpose of this opinion.

         Without  limiting the generality of the foregoing,  in our examination,
we have assumed without  independent  verification  that (i) each of the parties
thereto has duly and validly executed and delivered each  instrument,  document,
and  agreement  to which such party is a  signatory,  (ii) each  natural  person
executing any such instrument, document, or agreement is legally competent to do
so,  (iii)  all  documents  submitted  to us as  originals  are  authentic,  the
signatures  on all  documents  that we examined are genuine,  and all  documents
submitted to us as certified, conformed, photostatic or facsimile copies conform
to the original document, and (iv) all corporate records made available to us by
the Company are accurate and complete.

         Based upon the foregoing, and having regard to legal considerations and
other  information that we deem relevant,  we are of the opinion that the Shares
have been duly authorized and, when and to the extent Shares are issued and sold
in accordance with the Plan, such Shares will be validly issued,  fully paid and
non-assessable.

         We  express  no  opinion  herein  as  to  the  laws  of  any  state  or
jurisdiction other that the laws of the State of California and the federal laws
of the United States of America.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement and the  reference to this firm therein.  In giving this
consent, we do not admit that we are in the category of persons whose consent is
required  under  Section  7 of the  Act  or the  rules  and  regulations  of the
Commission promulgated thereunder.

                                                     Very truly yours,

                                                     s/ REED SMITH LLP

                                                     REED SMITH LLP