UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934
                              (Amendment No: 5)*



                                 Enova Systems, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   29355M200
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                December 31, 2010
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
[ ] Rule 13d-1(b)
[X] Rule 13d-1(c)
[ ] Rule 13d-1(d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures  provided  in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).



CUSIP No. 29355M200

     1.   Names of Reporting Persons.
          I.R.S. Identification Nos. of above persons (entities only).

            GAM Holding Ltd
          -------------------
--------------------------------------------------------------------------------
     2.   Check the Appropriate Box if a Member of a Group (See Instructions)
          (a)      .............................................................
          (b)      .............................................................

     3.   SEC Use Only


     4.   Citizenship or Place of Organization

          Switzerland
          -----------

Number of            5.    Sole Voting Power
Shares                      1,514,275
Beneficially                ---------
Owned by             6.    Shared Voting Power
Each Reporting
Person With*         7.    Sole Dispositive Power
                            1,514,275
                            ---------
                     8.    Shared Dispositive Power

     9.   Aggregate Amount Beneficially Owned by Each Reporting Person

          1,514,275
          ---------

     10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares
          (See Instructions)

     11.  Percent of Class Represented by Amount in Row (9) 7.13%
                                                            -----
          (based on the total of 21,245,238 outstanding shares of common stock)

     12.  Type of Reporting Person (See Instructions)  HC
                                                       --

*GAM Holding Ltd. disclaims beneficial ownership of such securities.

Item 1.
          (a)  Name of Issuer  Enova Systems, Inc.
                               --------------

          (b)  Address of Issuer's Principal Executive Offices
               1560 West 190th Street, Torrance, California 90501




Item 2.
          (a)  Name of Person Filing
               GAM Holding Ltd
               --------------
          (b)  Address of Principal Business Office or, if none, Residence
               Klaustrasse 10, 8008 Zurich, Switzerland
               ----------------------------------------

          (c)  Citizenship
               Switzerland
               ------------

          (d)  Title of Class of Securities
               Common Stock
               ------------

          (e)  CUSIP Number
               29355M200
               ---------

Item  3.  If  this  statement  is  filed  pursuant  to   ss.ss.240.13d-1(b)   or
          240.13d-2(b) or (c), check whether the person filing is a:

          [ ] (a)  Broker or dealer  registered  under  section  15 of the Act
                   (15 U.S.C. 78o).

          [ ] (b) Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

          [ ] (c) Insurance  company as defined in section 3(a)(19) of the Act
                  (15 U.S.C. 78c).

          [ ] (d) Investment  company registered under section 8 of the
                  Investment Company Act of 1940 (15 U.S.C 80a-8).

          [ ] (e) An investment adviser in accordance
                  withss.240.13d-1(b)(1)(ii)(E);

          [ ] (f) An employee benefit plan or endowment fund in accordance
                  withss.240.13d-1(b)(1)(ii)(F);

          [X] (g) A parent holding company or control person in accordance
                  withss.240.13d-1(b)(1)(ii)(G);

          [ ] (h) A savings associations as defined in Section 3(b) of the
                  Federal Deposit Insurance Act (12 U.S.C. 1813);

          [ ] (i) A church plan that is excluded from the definition of an
                  investment company under section 3(c)(14) of the Investment
                  Company Act of 1940 (15 U.S.C. 80a-3);

          [ ] (j) Group, in accordance withss.240.13d-1(b)(1)(ii)(J).




Item 4.       Ownership.

Provide the following  information regarding the aggregate number and percentage
of the class of securities of the issuer identified in Item 1.


                                                                    

              (a)    Amount beneficially owned: 1,514,275
                                                ---------
              (b)    Percent of class: 7.13%  (based on the total of 21,245,238 outstanding shares of common stock)
                                       -----
              (c)    Number of shares as to which the person has:

                     (i)   Sole power to vote or to direct the vote             1,514,275
                                                                                ---------
                     (ii)  Shared power to vote or to direct the vote
                                                                                ---------
                     (iii) Sole power to dispose or to direct the
                           disposition of                                       1,514,275
                                                                                ---------
                     (iv)  Shared power to dispose or to direct the
                           disposition of
                                                                                ---------


Item 5.  Ownership of Five Percent or Less of a Class

If this  statement  is being filed to report the fact that as of the date hereof
the  reporting  person has ceased to be the  beneficial  owner of more than five
percent of the class of securities, check the following [ ].

Item 6.  Ownership of More than Five Percent on Behalf of Another Person.

Not applicable

Item 7.  Identification  and Classification of the Subsidiary Which Acquired the
Security Being Reported on By the Parent Holding Company or Control Person.

GAM International Management Limited
GAM London Ltd.

This  report  is  filed  by  GAM  Holding  Ltd,  a holding company registered in
Switzerland.  GAM  International  Management  Limited  ("GIML")  and  GAM London
Limited ("GAM London") are wholly-owned subsidiaries of GAM Holding Ltd. GIML is
the  investment  adviser  of  GAM  Global  Diversified  and  GAM  London  is the
investment  adviser  of  SJP GAM Managed - Life, SJP GAM Managed - Pension, SJPI
GAM Sterling Managed Fund and SJPI GAM US Dollar Managed Fund (collectively, the
"Funds")  and  therefore  indirectly own the 1,514,275 shares of Common Stock in
Enova Systems, Inc. of which the Funds hold.

Item 8.  Identification and Classification of Members of the Group

Not Applicable

Item 9.  Notice of Dissolution of Group

Not Applicable






Item 10. Certification

           The following certification shall be included if the statement is
           filed pursuant to ss.240.13d-1(c): By signing below I certify that,
           to the best of my knowledge and belief, the securities referred to
           above were not acquired and are not held for the purpose of or with
           the effect of changing or influencing the control of the issuer of
           the securities and were not acquired and are not held in connection
           with or as a participant in any transaction having that purpose or
           effect.

                                    SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

                                        February 10, 2011
                                     --------------------------------
                                                   Date

                                        /s/ Scott Sullivan
                                     --------------------------------
                                                Signature

                                    Scott Sullivan, Group General Counsel




JOINT FILING AGREEMENT

In  accordance  with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934,
as  amended,  the  undersigned  hereby  agree  to  joint  filing of the attached
Schedule  13G,  and  any and all amendments thereto, and expressly authorize GAM
Holding  Ltd,  as  the  ultimate  parent  company  of  each  of  its undersigned
subsidiaries,  to file such Schedule 13G, and any and all amendments thereto, on
behalf of each of them.


Date: February 10, 2011



GAM Holding Ltd

By: /s/ Scott Sullivan
Name: Scott Sullivan
Title: Group General Counsel


GAM International Management Limited

By: /s/ Scott Sullivan
Name: Scott Sullivan
Title: Group General Counsel


GAM London Limited

By: /s/ Scott Sullivan
Name: Scott Sullivan
Title: Group General Counsel